Single Mode/PM Tap Power Monitor (Reflect Version)

  • Integrated
  • Low Loss Device
  • Custom Tap Ratios Available
  • Compact Design

Click 'Spec Sheet' for available configurations/part#


The Tap Optical Power Monitor is a hybrid fiber optical passive component that integrates a thin-film tap of flat spectral response with a high sensitivity PIN photodiode for power monitoring applications. The Power Monitor minimizes component assembly costs and module footprint while increasing module design efficiency by facilitating fiber Management. The Power Monitor combines the functionality of an optical coupler and a photodiode while delivering low insertion loss and low dark current with high-temperature stability over a wide wavelength range. Our directional version works well from 1260nm to 1620nm band.


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Tap Power Monitor Min Typical Max  Unit
 Operation Wavelength 1260 1620 nm
Rap Ratio 1 3 5 %
Insertion Loss1 0.5 0.7 0.9 dB
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 23oC 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
Opereating Temperature -5 75 oC
Storage Temperature -40 85 oC
Reliability Telcordia 1209 and 1221
Package Dimension 6.0 x 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