etMEMS™ Straight Multimode Variable Optical Attenuator

The etMEMS™ Series variable optical attenuator (VOA) is based on a proprietary MEMS design, offering many desirable features.  The MEMS shutter is capable of totally blocking the light, providing exceptionally large extinction.  It has no optical coating or lens, enabling broad wavelength operation, as well as high power capability.  This device is also low cost.

The VOA is driven with an electrical current at low voltage, and the attenuation can be continuously adjusted with the applied current or voltage. The silicon MEMS device is highly reliable with longevity.  However, it can be damaged by applying voltage over the threshold.

  • Compact
  • Broad-Band
  • Low Cost
  • High Reliability
  • Low IL, PDL, WDL & TDL
  • Low Power Consumption


  • Power Control
  • Power Regulate
  • Channel Balance
  • Instrumentation


etMEMSTM MM Series VOA Min Typical Max Unit
 Operation Wavelength 350 2050 nm
 Insertion Loss[1] 1.5 1.8 dB
 Wavelength Dependent Loss[2] 0.6 dB
  Temperature Dependent Loss[3] 0.2 dB
Attenuation Range 35 dB
Attenuation Resolution Continuous
Return Loss >20 dB
Response Time        10 ms
Driving Voltage 4.5 5.2 [4] V
Device Electrical Resistance 100 ohm
Optical Power Handling[5] 500 mW
Operating Temperature -10 75 oC
Storage Temperature -40 85 oC
Fiber Type 50/125, 62.5/125 MM fiber
Package Dimension 22×5.6×6 mm


[1]. CPR<15, wavelength of 1550 nm, at room temperature, without connectors

[2]. At attenuation of 20dB or less

[3]. At 0 attenuation and at whole temperature range

[4]. Over this value will damage the device

[5]. High power version also available

[6]. Current control version is available