DC-100kHz Driver for NanoSpeed™ Variable Optic Attenuator

(we make custom electronic circuits for all application scenarios)

This NS series of fast-speed driver is designed to control NS series of solid state variable optic attenuators (VOA). The push-pull output design is especially suitable for driving capacitive VOA loads, assuring the fast response time both on rising and falling of attenuation. The driver can be operated by 0-5V signal to control the attenuation of VOA.

The standard driver controls one individual VOA. Drivers controlling multiple VOAs are also available, please call Sales at (781) 935-1200 for more information.

DC-100kHz Driver for NanoSpeed™ Variable Optic Attenuator

This NS series of fast-speed driver is designed to control NS series of solid state variable optic attenuators (VOA). The push-pull output design is especially suitable for driving capacitive VOA loads, assuring the fast response time both on rising and falling of attenuation. The driver can be operated by 0-5V signal to control the attenuation of VOA. The standard driver controls one individual VOA. Drivers controlling multiple VOAs are also available, please call Sales at (781) 935-1200 for more information.
  Technical Specs Min Typical Max Unit
Response time (Rise) (Sr) [1] 250 850 ns
Response time (Fall) (Sf) [2] 250 850 ns
Repetition Rate DC 100 kHz
Control signal for attenuation 0 5[3] V
Power Consumption [4] 8 W
Power Supply 12 24 V
Operating Temperature -5 70 ºC
Storage Temperature -40 80 ºC
Electrical Connector SMA
Board Size 3.94(L)x2.36(W)x0.6(H) Inch

Note:

[1]: Response time (Rise): Begin of electronic signal to the completion of optic intensity change.

[2]: Response time (Fall): Begin of electronic signal to the completion of optic intensity change.

[3]: For full attenuation in VOA

[4]: Dependent on repetition frequency. Measured for the attenuation > 20dB at 100 kHz.


Q: Does NS device drift over time and temperature?
A: NS devices are based on electro-optical crystal materials that can be influenced to a certain range by the environmental variations.  The insertion loss of the device is only affected by the thermal expansion induced miss-alignment.  For extended temperature operation, we offer special packaging to -40 -100 0C.   The extinction or cross-talk value is affected by many EO material characters, including temperature-dependent birefringence,  Vp, temperature gradient, optical power, at resonance points (electronic).  However, the devices are designed to meet the minimum extinction/cross-talk stated on the spec sheets.  It is important to avoid a temperature gradient along the device length.

Q: What is the actual applying voltage on the device?
A: 100 to 400V depending on the version.

Q: How does the device work?
A: NS devices are not based on Mach-Zander Interference, rather birefringence crystal’s nature beam displacement,  in which the crystal creates two different paths for beams with different polarization orientations.

Q: What is the limitation for faster operation?
A: NS devices have been tested to have an optical response of about 300 ps.  However, practical implementation limits the response speeds.    It is possible to achieve a much faster response when operated at partial extinction value.  We also offer resonance devices over 20MHz with low electrical power consumption.