In addition to the one-year free warranty, we further offer extended warranties for most of our products under the same term listed above. The approximate cost is listed below

3 years – add 28%

5 years – add 39%

7 years – add 79%

9 years – add 95%

Agiltron brand fiber optical products are designed for longevity with up to 20 years in field operation. Each product is tested, meeting the performance specifications listed on the datasheet prior to shipping. If a customer has difficulty achieving the same result as the test report, please check the following possibilities:

            1. Connectors – Al our optical loss test results are without connectors. Higher optical losses may result from connector issues. In general, 0.3dB extra loss for each connector should be expected due to center miss-matching. The connector must be thoroughly cleaned after each mating. Otherwise, the loss will increase due to surface scratching by dust in the air which prevents physical contact between the two fibers. The loss will continue to increase after each use once the surface is scratched.

             2. Test Instruments – The devices should be tested using standard test instruments to obtain the same results. We use mainly Agilent optical testing equipment, using dB as a relative optical intensity and dBm as absolute optical intensity metrics. This needs several years of practical experience in handling fiber optics, in addition to a good understanding of optics, especially involving polarization, single-mode fiber or multimode transmission, and high-speed measurement. A good practice is to use a bare fiber cable to make sure the instrument works properly and zero the instrument in dB. It is not encouraged to learn basic optics using our products. Please do not contact us if a customer uses different measurement instruments with different metrics.

            3. PCBS – Many of our products have naked PCB for lower-cost OEM applications. This requires trained personnel to handle it. If you cannot make it work, most likely, the PCB is damaged. Hand touching can damage the PCB due to static, especially in dry winter. Water and metal surfaces can short the circuits. They are easily damaged by new graduates without working experience. Please treat our OEM products as if they were your cell phone without the cover. For lab applications, please order with a metal protecting box as an instrument-grade product.

            4. Optical Fiber – Optical fiber is made of glass that is easy to be damaged by pulling, twisting, bending, or squeezing, although it looks like an electrical wire. The device is especially vulnerable to twists at the end since it has no protection for such motion.

            5. Retest – We offer to retest the product. If it is found defective within one year, we will repair or replace it. However, if they meet the specification on the datasheet, customers are required to pay the USA labor cost and re-connector cost (we cut the connectors off). In almost all the cases for released products (some products are in the optimization phase), the products meet the specification in the retesting, except for shipping damages. This procedure is costly since many products are mass-produced in automated assembly lines.

UNLESS OTHERWISE EXPRESSLY AGREED IN WRITING, ALL SALES ARE SUBJECT TO THE FOLLOWING TERMS AND CONDITIONS:

1. GENERAL. Agiltron Inc. (“Seller”) hereby offers for sale to the buyer named on the face hereof (“Buyer”) the products listed on the face hereof (the “Products”) on the express condition that Buyer agrees to accept and be bound by the terms and conditions set forth herein. Any provisions contained in any document issued by Buyer are expressly rejected, and if the terms and conditions in this Agreement differ from the terms of Buyer’s offer, this document shall be construed as a counter offer and shall not be effective as an acceptance of Buyer’s document. Buyer’s receipt of Products or Seller’s commencement of the services provided hereunder will constitute Buyer’s acceptance of this Agreement. This is the complete and exclusive statement of the contract between Seller and Buyer with respect to Buyer’s purchase of the Products. No waiver, consent, modification, amendment, or change of the terms contained herein shall be binding unless in writing and signed by Seller and Buyer. Seller’s failure to object to terms contained in any subsequent communication from Buyer will not be a waiver or modification of the terms set forth herein. All orders are subject to acceptance in writing by an authorized representative of the Seller.

2. PRICE. All prices published by Seller or quoted by Seller’s representatives may be changed at any time without notice. All prices for the Products will be as specified by Seller or, if no price has been specified or quoted, will be Seller’s price in effect at the time of shipment. All prices are subject to adjustment as a result of specifications, quantities, shipment arrangements, or other terms and conditions which are not part of the Seller’s original price quotation.

3. TAXES AND OTHER CHARGES Prices for the Products exclude all sales, value-added, and other taxes and duties imposed with respect to the sale, delivery, or use of any Products covered hereby, all of which taxes and duties must be paid by Buyer. If the Buyer claims any exemption, the Buyer must provide a valid, signed certificate or letter of exemption for each respective jurisdiction.

4. TERMS OF PAYMENT. Seller may invoice Buyer upon shipment for the price and all other charges payable by Buyer in accordance with the terms hereof. Upon Seller approval of credit review on trade references provided by the Buyer, payment shall be net thirty (30) days from the date of invoice. If Buyer fails to pay any amounts when due, Buyer shall pay Seller interest thereon at a periodic rate of one and one‐half percent (1.5%) per month (or, if lower, the highest rate permitted by law), together with all costs and expenses (including without limitation reasonable attorneys’ fees and disbursements and court costs) incurred by Seller in collecting such overdue amounts or otherwise enforcing Seller’s rights hereunder. Seller reserves the right to require from Buyer full or partial payment in advance, or other security that is satisfactory to Seller, at any time that Seller believes in good faith that Buyer’s financial condition does not justify the terms of payment specified. All payments shall be made in U.S. Dollars (USD). For orders invoiced or shipped outside of the United States, the Seller will require cash in advance via bank wire transfer, credit card, or irrevocable letter of credit payable at sight in USD and must be confirmed by a United States bank. All bank charges incurred either inside or outside the applicant’s country must be applied to the applicant’s account.

5. DELIVERY; CANCELLATION OR CHANGES BY BUYER. The Products will be shipped to the destination specified by Buyer, F.O.B. Seller’s facility. The Seller will have the right, at its election, to make partial shipments of the Products and to invoice each shipment separately. Unless otherwise agreed to in writing by the parties, the freight and handling are prepaid by the Seller and added to the invoice. Seller reserves the right to stop delivery of Products in transit and to withhold shipments in whole or in part if Buyer fails to make any payment to Seller when due or otherwise fails to perform its obligations hereunder. All shipping dates are approximate only, and Seller will not be liable for any loss or damage resulting from any delay in delivery or failure to deliver which is due to any cause beyond Seller’s reasonable control. In the event of a delay due to any cause beyond Seller’s reasonable control, Seller reserves the right to terminate the order or to reschedule the shipment within a reasonable period of time, and Buyer will not be entitled to refuse delivery or otherwise be relieved of any obligations as the result of such delay. Products as to whose delivery is delayed due to any cause within Buyer’s control may be placed in storage by the Seller at Buyer’s risk and expense and for the Buyer’s account. Orders in process may be canceled only with Seller’s written consent and upon payment of Seller’s cancellation charges. Orders in process may not be changed except with Seller’s written consent and upon agreement by the parties as to an appropriate adjustment in the purchase price thereof. Credit will not be allowed for Products returned without the prior written consent of the Seller.

6. RETURN OF PRODUCTS/RESTOCKING CHARGE. Buyer must obtain permission from Seller prior to returning Products. Old items, service parts, and discontinued items cannot be returned for credit. In order to obtain an RMA number, the Buyer must contact the Seller’s customer support. Seller, at its discretion, may impose a twenty-five percent (25%) restocking charge of the price paid for any item authorized for return for credit. For custom-made or made to order products, all sales are final with no returns accepted.

7. TITLE AND RISK OF LOSS. Notwithstanding the trade terms indicated above and subject to the provisions of Section 8 below and to Seller’s right to stop delivery of Products in transit, title to and risk of loss of the Products will pass to Buyer upon delivery of possession of the Products by Seller to the carrier; provided; however, that title to any software incorporated within or forming a part of the Products shall at all times remain with Seller or the licensor(s) thereof, as the case may be.

8. WARRANTY. Seller warrants that the Products will operate substantially in conformance with Seller’s published specifications when subjected to normal, proper, and intended usage by properly trained personnel for a period of one (1) year from the date of shipment to Buyer (the “Warranty Period”). Seller agrees during the Warranty Period, provided it is promptly notified in writing upon the discovery of any defect and further provided that all costs of returning the defective Products to Seller are pre‐paid by Buyer, to repair or replace, at Seller’s option, defective Products so as to cause the same to operate in substantial conformance with said specifications. Replacement parts may be new or refurbished at the election of the Seller. All replaced parts shall become the property of the Seller. Shipment to Buyer of repaired or replacement Products shall be made in accordance with the provisions of Section 5 above. Lamps, fuses, bulbs, and other expendable items are expressly excluded from the warranty under this Section 9. Seller’s sole liability with respect to equipment, materials, parts, or software furnished to Seller by third-party suppliers shall be limited to the assignment by Seller to Buyer of any such third-party supplier’s warranty, to the extent the same is assignable. In no event shall Seller have any obligation to make repairs, replacements, or corrections required, in whole or in part, as the result of (i) normal wear and tear, (ii) accident, disaster, or event of force majeure, (iii) misuse, fault or negligence of or by Buyer, (iv) use of the
Products in a manner for which they were not designed, (v) causes external to the Products such as, but not limited to, power failure or electrical power surges, (vi) improper storage of the Products or (vii) use of the Products in combination with equipment or software not supplied by Seller. If Seller determines that Products for which Buyer has requested warranty services are not covered by the warranty hereunder, Buyer shall pay or reimburse Seller for all costs of investigating and responding to such request at Seller’s then prevailing time and materials rates. If Seller provides repair services or replacement parts that are not covered by the warranty provided in this Section 9, Buyer shall pay Seller, therefore, at Seller’s then prevailing time and materials rates. With respect to spare parts, the above‐referenced warranty applies; however, such warranty is limited to ninety (90) days from the date of shipment.
ANY INSTALLATION, MAINTENANCE, REPAIR, SERVICE, RELOCATION, OR ALTERATION TO OR OF, OR OTHER TAMPERING WITH, THE PRODUCTS PERFORMED BY ANY PERSON OR ENTITY OTHER THAN THE SELLER WITHOUT THE SELLER’S PRIOR WRITTEN APPROVAL OR ANY USE OF REPLACEMENT PARTS NOT SUPPLIED BY SELLER, SHALL IMMEDIATELY VOID AND CANCEL ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS. THE OBLIGATIONS CREATED BY THIS SECTION TO REPAIR OR REPLACE A DEFECTIVE PRODUCT SHALL BE THE SOLE REMEDY OF THE BUYER IN THE EVENT OF A DEFECTIVE PRODUCT. EXCEPT AS EXPRESSLY PROVIDED IN THIS SECTION 9, THE SELLER DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED, ORAL OR WRITTEN, WITH RESPECT TO THE PRODUCTS, INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THE SELLER DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR‐FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT.

9. INDEMNIFICATION.
9.1 By Seller. Seller agrees to indemnify, defend and save Buyer, its officer, directors, and employees from and against any and all damages, liabilities, actions, causes of action, suits, claims, demands, losses, costs and expenses (including without limitation reasonable attorney’s fees) ( Indemnified Items!) for (i) injury to or death of persons or damage to property to the extent caused by the negligence or willful misconduct of Seller, its employees, agents or representatives or contractors in connection with the performance of services at Buyers premises under this Agreement and (ii) claims that a Product infringes any valid United States patent, copyright or trade secret; provided, however, Seller shall have no liability under this Section to the extent any such Indemnified Items are caused by either (i) the negligence or willful misconduct of Buyer, its employees, agents or representatives or contractors, (ii) by any third party, (iii) use of a Product in combination with equipment or software not supplied by Seller where the Product would not itself be infringing, (iv) compliance with Buyer’s designs, specifications or instructions, (v) use of the Product in an application or environment for which it was not designed or (vi) modifications of the Product by anyone other than Seller without Seller’s prior written approval. Buyer shall provide Seller prompt written notice of any third-party claim covered by Seller’s indemnification obligations hereunder. Seller shall have the right to assume exclusive control of the defense of the such claim or, at the option of the Seller, to settle the same. Buyer agrees to cooperate reasonably with Seller in connection with the performance by Seller of its obligations in this Section. Notwithstanding the above, Sellers infringement related indemnification obligations shall be extinguished and relieved if Seller, at its discretion and at its own expense, (a) procures for Buyer the right, at no additional expense to Buyer, to continue using the Product; (b) replaces or modifies the Product so that it becomes non‐infringing, provided the modification or replacement does not adversely affect the specifications of the Product; or (c) in the event (a) and (b) are not practical, refund to Buyer the amortized amounts paid by Buyer with respect thereto, based on a five (5) year amortization schedule. THE FOREGOING INDEMNIFICATION PROVISION STATES THE SELLER’S ENTIRE LIABILITY TO THE BUYER FOR THE CLAIMS DESCRIBED HEREIN.
9.2 By Buyer. Buyer shall indemnify, defend with competent and experienced counsel and hold harmless Seller, its parent, subsidiaries, affiliates and divisions, and their respective officers, directors, shareholders, and employees, from and against any and all damages, liabilities, actions, causes of action, suits, claims, demands, losses, costs and expenses (including without limitation reasonable attorneys’ fees and disbursements and court costs) to the extent arising from or in connection with (i) the
negligence or willful misconduct of Buyer, its agents, employees, representatives, or contractors; (ii) use of a Product in combination with equipment or software not supplied by Seller where the Product itself would not be infringing; (iii) Seller’s compliance with designs, specifications or instructions supplied to Seller by Buyer; (iv) use of a Product in an application or environment for which it was not designed; or (v) modifications of a Product by anyone other than Seller without Seller’s prior written approval.

10. SOFTWARE. With respect to any software products incorporated in or forming a part of the Products hereunder, Seller and Buyer intend and agree that such software products are being licensed and not sold and that the words “purchase”, “sell”, or similar or derivative words are understood and agreed to mean “license”, and that the word “Buyer” or similar or derivative words are understood and agreed to mean “licensee”. Notwithstanding anything to the contrary contained herein, Seller or its licensor, as the case may be, retains all rights and interest in software products provided hereunder.
Seller hereby grants to Buyer a royalty‐free, non‐exclusive, non-transferable license, without power to sublicense, to use the software provided hereunder solely for Buyer’s own internal business purposes on the hardware products provided hereunder and to use the related documentation solely for Buyer’s own internal business purposes. This license terminates when the Buyer’s lawful possession of the hardware products provided hereunder ceases unless earlier terminated as provided herein. Buyer agrees to hold in confidence and not to sell, transfer, license, loan, or otherwise make available in any form to third parties the software products and related documentation provided hereunder. Buyer may not disassemble, decompile or reverse engineer, copy, modify, enhance or otherwise change or supplement the software products provided hereunder without Seller’s prior written consent. Seller will be entitled to terminate this license if Buyer fails to comply with any term or condition herein. Buyer agrees, upon the termination of this license, immediately to return to Seller all software products and related documentation provided hereunder and all copies and portions thereof. Certain of the software products provided by Seller may be owned by one or more third parties and licensed to Seller. Accordingly, Seller and Buyer agree that such third parties retain ownership of and title to such software products. The warranty and indemnification provisions set forth herein shall not apply to software products owned by third parties and provided hereunder.

11. LIMITATION OF LIABILITY. NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED HEREIN, THE LIABILITY OF THE SELLER UNDER THESE TERMS AND CONDITIONS (WHETHER BY REASON OF BREACH OF CONTRACT, TORT, INDEMNIFICATION, OR OTHERWISE, BUT EXCLUDING LIABILITY OF THE SELLER FOR BREACH OF WARRANTY (THE SOLE REMEDY FOR WHICH SHALL BE AS PROVIDED UNDER SECTION 9 ABOVE)) SHALL NOT EXCEED AN AMOUNT EQUAL TO THE TOTAL PURCHASE PRICE THERETOFORE PAID BY BUYER TO SELLER WITH RESPECT TO THE PRODUCT(s) GIVING RISE TO SUCH LIABILITY. NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED HEREIN, IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES (INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF USE OF FACILITIES OR EQUIPMENT, LOSS OF REVENUE, LOSS OF DATA, LOSS OF PROFITS OR LOSS OF GOODWILL), REGARDLESS OF WHETHER SELLER (a) HAS BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES OR (b) IS NEGLIGENT.

12. INDUSTRIAL PROPERTY RIGHTS. All copyrights, patents, trademarks, designs, and other intellectual property rights belonging to Seller or used by the Seller under license from third parties in or in connection with the Product(s) that are the subject matter of the Contract (including drawings, specifications or instruction manuals supplied therewith) are reserved to the Seller. The Buyer, in purchasing the Product(s), obtains no rights to copy, reproduce, or otherwise exploit the products (or such drawings, specifications, or instruction manuals), the Buyer’s rights being limited to using the Products for the normal purpose for which they are intended.

13. PATENTS. Unless otherwise agreed in writing by both Seller and Buyer before placement of Buyer’s first order with Seller, Seller shall not be liable for the indemnification of Buyer for damages resulting from the infringement of any Domestic or foreign country patent rights arising out of or in connection with any of Seller’s products. In the event that any product supplied hereunder gives rise to any such patent infringement or allegation thereof, Seller expressly retains the right to refer complaining parties to Buyer for settlement. Buyer shall indemnify and hold Seller harmless from any and all claims, loss, damage, liability, and expense (including, without limitation, reasonable attorney’s fees and disbursements and other litigation and settlement costs, regardless of outcome) arising out of any claims that any product supplied infringes any third‐party patent rights.

14. EXPORT RESTRICTIONS. Buyer acknowledges that each Product and any related software and technology, including technical information supplied by Seller or contained in documents (collectively Items), is subject to export controls of the U.S. government. The export controls may include, but are not limited to, those of the Export Administration Regulations of the U.S. Department of Commerce (the EAR), which may restrict or require licenses for the export of Items from the United States and their re‐export from other countries. Buyer shall comply with the EAR and all other applicable laws, regulations, laws, treaties, and agreements relating to the export, re‐export, and import of any Item. Buyer shall not, without first obtaining the required license to do so from the appropriate U.S. government agency; (i) export or re‐export any Item, or (ii) export, re‐export, distribute or supply any Item to any restricted or embargoed country or to a person or entity whose privilege to participate in exports have been denied or restricted by the U.S. government. Buyer shall cooperate fully with Seller in any official or unofficial audit or inspection related to applicable export or import control laws or regulations and shall indemnify and hold Seller harmless from, or in connection with, any violation of this Section by Buyer or its employees, consultants, agents, or customers.

15. FORCE MAJEURE. The Seller shall be entitled at any time, on notice to the Buyer, without prejudicing its rights in respect of deliveries already made and without incurring any liability whatsoever to the Buyer for any failure to perform hereunder where such failure shall be caused or occasioned by acts of God (including fire, flood, earthquake, storm, hurricane or another natural disaster), war, invasion, acts of foreign combatants, terrorists acts, government actions, labor disputes of third parties, failure in whole or in part of Seller’s suppliers or any subcontractor to deliver or schedule materials, equipment or machinery to Seller, interruption of transportation, shortage of fuel, energy or utilities, or by any other event or circumstance of similar or different nature beyond the reasonable control of the Seller.

16. HAZARDOUS MATERIALS. Some Products may require special labeling and handling. Carriers may add additional freight charges for the handling or transporting of these materials. The consolidating of such material with other Products may be prohibited. Additional freight charges will be billed per the Seller’s shipping terms. Be sure to advise the Seller of shipping instructions for these hazardous materials to reduce your freight costs.

17. LASER WARNING. Products contain Class IIIb lasers. It is safe to operate when users follow all safety instructions as noted in product documentation; (a) post warnings in the area around the spectrometer; (b) keep all unauthorized personnel out of the area where the laser is operated; (c) when the indicator light on the probe is “ON”; (d) DO NOT look into the path of the beam; (e) safety goggles provided with the system should be worn at ALL times; (f) NEVER LOOK DIRECTLY at the laser source.

18. MISCELLANEOUS. (a) Buyer may not delegate any duties nor assign any rights or claims hereunder without Seller’s prior written consent, and any such attempted delegation or assignment shall be void. (b) The rights and obligations of the parties hereunder shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts without reference to its choice of law provisions. Each party hereby irrevocably consents to the exclusive jurisdiction of the state and federal courts located in Middlesex County, Massachusetts, in any action arising out of or relating to this Agreement and waives any other venue to which it may be entitled by domicile or otherwise. (c) In the event of any legal proceeding between the Seller and Buyer relating to this Agreement, neither party may claim the right to a trial by jury, and both parties waive any right they may have under applicable law or otherwise to a right to a trial by jury. Any action arising under this Agreement must be brought within one (1) year from the date that the cause of action arose. (d) The application to this Agreement of the U.N. Convention on Contracts for the International Sale of Goods is hereby expressly excluded. (e) In the event that any one or more provisions contained herein shall be held by a court of competent jurisdiction to be invalid, illegal, or unenforceable in any respect, the validity, legality, and enforceability of the remaining provisions contained herein shall remain in full force and effect unless the revision materially changes the bargain. (f) Seller’s failure to enforce, or Seller’s waiver of a breach of, any provision contained herein shall not constitute a waiver of any other breach or of such provision. (g) Any notice or communication required or permitted hereunder shall be in writing and shall be deemed received when personally delivered or three (3) business days after being sent by certified mail, postage prepaid, to a party at the address specified herein or at such other address as either party may from time to time designate to the other.

To measure the insertion loss of a single-mode fiber optical device, follow these steps to ensure accuracy and reliability:

1.     Preparation

• Fiber Optical Jumper Cable: Create a fiber optical jumper cable that matches the fiber type and connectors used in the device under test. This jumper will be used for calibration purposes.

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2.     Laser Source Preparation

• Laser Type: Use a stabilized laser that matches the specifications outlined in the purchase order (PO) or datasheet. The laser should have a feedback controller to ensure stable output.
• Optical Isolator: Employ an optical isolator to prevent instability caused by back reflections.
• Laser Characteristics: Be aware that different types of lasers (single-mode with sharp peaks or broadband) and multimode lasers can affect measurements differently, particularly impacting return loss and effective reflection.
• Polarization Maintenance: For devices requiring polarization maintenance, use a fiber laser-based polarization-maintaining (PM) light source with both power and extinction ratio (ER) stabilized for optimal accuracy.
• Optical Power Meter: Use a benchtop optical power meter, such as those from Agilent. Ensure it has large area detector heads (silicon for shortwave, germanium for IR) for accurate measurements.

3.     Calibration

• With Optical Connectors: Connect the fiber jumper cable in place of the device to be tested. Zero the optical power meter. It should read 0.00 dB. This ensures that the meter is properly calibrated for connector losses.
• With Bare Fibers: If testing a device with bare fibers, insert the bare fiber end of the laser into the large area detector head using an Agilent bare fiber adapter. Zero the meter, ensuring it reads 0.00 dB. This step calibrates the meter to account for the bare fiber’s characteristics.

4.     Measurement

• For Devices with Connectors: Replace the fiber jumper cable with the device to be measured. The optical power meter will display the insertion loss. Note that this method may introduce errors due to connector variations.
• For Devices with Bare Fibers: Perform a splice between one end of the device and the laser, then insert the other end into the large area detector head using the Agilent bare fiber adapter. The optical power meter will display the insertion loss, offering a more accurate measurement by eliminating connector losses.

Additional Tips

• Consistency: Ensure that all connections are clean and properly aligned to minimize measurement errors.
• Documentation: Record the measurement conditions, including laser type, wavelength, and any deviations observed during testing.
• Repeat Measurements: For greater accuracy, consider performing multiple measurements and averaging the results.

By carefully following these steps, you can achieve reliable and accurate measurements of insertion loss for single-mode fiber optical devices.

        Agiltron offers a limited warranty, up to one year for products that involve mechanical movement and two years for other devices, effective from the date of delivery to the receiver of Agiltron’s products so delivered, pursuant to the receiver’s original purchase order issued to Agiltron, against defects in material or (and) workmanship caused by failure to meet Agiltron’s published specifications of the shipped products referenced herein, if such defects are properly reported to Agiltron, in the written notice, and the defective products are returned to Agiltron, in compliance to Agiltron’s Return Material Authorization (RMA) procedure, during the applicable warranty period.

        Within the Applicable warranty period so stated herein, at Agiltron’s sole discretion, upon review of the defective products returned and confirmation of the reported defects, Agiltron’s entire liability and the receiver’s exclusive remedy shall be limited to one of the two options specified henceforth: (a) refund or credit back of the payment applicable to the defective products, or (b) replacement of the products with proven defects.

        This Limited Warranty shall be deemed void, at Agiltron’s sole discretion, upon review of the returned products if the product defects are found to have been caused by any abuse, misuse, mishandling, misapplication, or accidents beyond Agiltron’s control. Any suggestions offered by Agiltron in customer care efforts for the application of Agiltron’s products do not assume any liability for any damages that may result from the use of its products.

        This Limited Warranty supersedes all other warranties, if any, whether verbal or written, express or implied, including, but not limited to, with respect of the products referenced herein, any warranties of merchantability, infringement, or fitness for a particular purpose.

The filter only works in the specific range, beyond this range extra peaks may show. These peaks can be block with special order.

Please follow these instructions to do an optical insertion loss test:

1. Connect a broadband fiber-coupled laser source to OSA, sweep one time over the specified range of the tunable filter, then fix the curve in Trace A as reference.
2. Connect the broadband laser source to the fiberoptic tunable filter fiber as input, then connect the other fiber port of the tunable filter as the output to the OSA.
3. Set OSA Trace B as ‘write,’ Trace C as ‘Calculate: B-A.’  Auto sweep Trace C from the specific range. Tune the micrometer to shift the peak at a different wavelength. Use ‘Peak search’ to record IL at a different wavelength.”

   Unlike single-mode laser, multimode light tends to spatially spread out in which each mode has its own distribution pattern and propagates light path. Therefore, without knowing the modal distribution, the measurement results can be drastically different using a different light source.  For example, a collimator that focuses a single-mode laser to a small spot of 0.1 mm may only achieve a spot size of 8 mm for a LED source.  Another common example is a multimode fiber optical device measured with 1 dB loss by the manufacturer can have 5 dB loss using a different laser at the customer site.

   The solution is to use the same light source to design, fabricate, and test the device. This will result in accurate and reproducing performance. A more convenient way is to use light sources with the same quantitively measured modal field number. There is a simple way to characterize the light source that everyone can perform using regular tools. Coupled Power Ratio (CPR) power ratio is an easier metric to understand and to do the test, although it has many deficits (a better way is available but more complex to do). It simply measures the propagating loss difference between a multimode fiber and a single-mode fiber. The following lists the measurement steps.

1.     Preparation

Make two patch cords (jumper cables).  One patch cord uses the same MM fiber as in your applications.   Another patch cord uses SM28 single mode (SM) fiber.

2.     First measurement (MM)

Connect the MM cable to a power meter as in Figure 1, and zero the meter.
(Note: Keep the patch-lead as straight as possible, as could affect the modal power distribution and hence the measurement accuracy).

3.     Second measurement (SM)

Leave the MM lead connected to the light source, connect the MM cable to the SM cable on one end and connect the other end of the SM to a power meter, as in Figure 2. Make a 30 mm diameter loop, which acts as a mode filter. Measure & record the power output (L2) of the MM to SM pigtail combination.

1.     CPR coefficient calculation

As meter was zeroed the CPR = – L2 (dB)
(Note: Otherwise, the CPR coefficient is calculated as CPR = L1 – L2)

For reference, an FP laser with 50/125 fiber has a CPR of about 10-14; and a LED with 50/125 fiber has a CPR of about 20-26