etMEMS™ Straight Polarization-Maintaining Variable Optical Attenuator

The SM Series PM variable attenuator (VOA) is based on proprietary MEMS design, offering many desirable features.  The MEMS shutter is cable of totally blocking the light providing exceptionally large extinction. This device is low cost, as we as high power capability.  The device features ceramic packaging providing exceptional temperature stability.

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


SM Series VOAMinTypicalMaxUnit
 Operation Wavelength3502050nm
 Insertion Loss [1]
 Wavelength Dependent Loss[2]0.3dB
  Temperature Dependent Loss[3]0.2dB
Extinction Ratio1822dB
Attenuation Range2535dB
Attenuation ResolutionContinuous
Return Loss55dB
Response Time       10ms
Driving Voltage[4]5[5]V
Device Electrical Resistance100ohm
Optical Power Handling[6]500mW
Operating Temperature-1075oC
Storage Temperature-4085oC
Fiber TypeSee order information
Package Dimension22×5.6×6mm


  • Without connector and at room temperature
  • At attenuation of 20dB or less
  • At 0 attenuation and at whole temperature range
  • The order of terminals does not matter
  • Over this value will damage the device

[6]. High power version also available


P/N: N/A