Fiber Direct Coupled Power Monitor

(350nm to 2300nm, all fiber types, single fiber input)
  • Low Cost
  • All Wavelength
  • All Fiber Type
  • Compact Design



The Fiber Coupled Optical Power Monitor is a component that directly integrates a fiber with a high sensitivity photodiode for power measurement applications. Our Power Monitor design minimizes component assembly costs and module footprint while increasing stability over a wide temperature and wavelength ranges.

The Fiber Coupled Optical Power Monitor comes with all wavelength and fiber types.  Associated sensor electronic amplifier is also available.


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Fiber Coupled Power Monitor Min Typical Max Unit
Wavelength                                          350                     2300 nm
Light Collection Efficiency 80 95 100 %
Responsivity2 8 25 45 mA/W
Input Power -45 27 dBm
WDL 0.02 dB/nm
PDL3 0.03 0.05 dB
Polarization extinction ratio4 18 23 dB
Tensile load 5 N
Return Loss       45 dB
Dark Current at 23°C 0.4 1.0 nA
Directivity5 None or >25 dB
Capacitance 0.7 0.9 pF
Reverse Voltage 5 20 V
Rise/Fall Time 0.3 ns
Cut-Off Frequency 2 GHz
Operating Temperature -5 75 oC
Storage Temperature -40 85 oC
Reliability Telcordia 1209 and 1221
Package Dimension               6.0 x L 18               mm



  1. Insertion Loss excluding connectors.
  2. The net responsivity is defined as the ratio of the PD current output and optical power measured at output fiber
  3. Single Mode Fiber version only.
  4. PM Fiber version only.
  5. Directivity defines the responsivity contrast between the case that light power comes from input fiber port and the case that light power comes from output fiber port. From 1260 to 1620nm.