etMEMS™ Variable Optical Attenuator Integrated With Input Tap (Voltage & Current control)


The etMEMSTM Series VOA with input tap is based on a micro-electro-mechanical mechanism featuring integrated compact design, simple construction, easy direct drive, excellent optical performance of ultra low insertion loss, low PDL, and broad wavelength operation range. The etMEMSTM Series VOA is compliant with the Telcordia 1209 and 1221 reliability standards. The etMEMSTM Series VOA is available in either normally-open or normally-closed configurations and with an integrated input tap option. The VOA is driven with an electrical current at low voltage or a converted voltage, and the attenuation can be continuously adjusted with the applied current.


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  • VOA + Tap
  • Compact Size
  • Low Cost
  • High Reliability
  • Low IL, PDL, WDL and TDL
  • Direct Low Voltage Drive


  • Power Control
  • Power Regulation
  • Channel Balance
  • Instrumentation


etMEMSTM  TVOA Min Typical Max Unit
 Wavelength                                    1260~1360 and/or 1510~1620 nm
 Insertion Loss1 0.3 0.5 0.8 dB
 Polarization Dependent Loss2 0.15 0.4 dB
 Wavelength Dependence Loss3,4 0.2 dB
 Temperature Dependence Loss3 0.05 0.2 dB
 Attenuation Range 25 35 dB
 Attenuation Resolution Continuous
 Polarization Mode Dispersion2 0.005 0.01 0.05 ps
 Return Loss 45 dB
 Response Time 5 ms
 Tap Response @ 1550nm 12 15 40 mA/W
 Wavelength Dependence Response 0.010 0.020 0.025 dB/nm
 Polarization Dependence Response2 0.02 0.10 0.25 dB
 Temperature Dependence Response 0.01 dB/°C
 Dark Current at 5V bias @ 23°C 1 nA
 Dark Current at 5V bias @ 70°C 30 70 nA
 3dB Bandwidth (cutoff frequency) 10 MHz
 Capacitance 12 pF
 Power Consumption 30 100 mW
 Optical Power 300 500 mW
 Operating Temperature -5 75 oC
 Storage Temperature -40 85 oC
Reliability Telcordia 1209 and 1221
Fiber Type                Corning SMF28
Package Dimension5 F6.1 X 35.2 mm



  1. Without connector and in room temperature
  2. At attenuation equal or less than 20dB
  3. At 0dB attenuation and in whole temperature range
  4. Within 30nm Bandwidth
  5. Length can be shorter (minimum=25mm)