Optical Variable Attenuators

  • SM, Multi-Mode, Polarization Maintaining (PM)
  • All Types: MEMS, Electro-Optical, Optomechanical
  • Ultra-Low Loss  (0.2 dB)
  • High Attenuation (> 65 dB)
  • All Wavelengths (200 nm to 3000 nm)
  • All Fiber Types (3 μm to 900 μm core, double cladding)
  • Ultra-High-Speed (100 ns)
  • High Optical Power (up to 20 W CW)
  • Low Drive Voltage < 5 V
  • Wide Operation Temperature (-40°C to 85°C)
  • Ultra-High Reliability (full space, mill-spec qualifications)
  • Smallest Size
  • Vibration Insensitive
  • Competitive Price
  • Turn-Key Modules and Unsurpassed Customer Solutions
  • Large Core (up to 1mm ф)
  • USB/RS232 Programmable

We produce the largest selections of fiber optic variable attenuators for most application scenarios, leading the market in performance and value. These VOAs have corresponding control electronics for ease of use. To guide the selection among the many types, please click this link. HOW TO SELECT VOA TYPES

Electrical Fiber Attenuator Selection Guide
Type Broadband
400-2400nm		 Vibration Insensitive
 Large Attenuation >70dB
 Ultra-Fast
10-100ns		 High Power
up to 20W		 Compact Array
 Ultra-Low
Loss <0.3dB		 Large Core
up to ø1mm
 High Precision
Fiber-Fiber™
MEMS    
NanoSpeed™      
Precision      

How To Select Variable Optical Attenuator (VOA) Type?

Feedback or Calibration
Electrically variable attenuators are used to control optical power.  It is generally used in a feedback scheme by incorporating an optical tap monitor in a fiber optical system to achieve precision power control that is independent of environmental changes.  Although calibration schemes are also used to compensate for temperature-induced variations, the calibrations often become less accurate over time.  We uniquely produce Precision VOAs with integrated feedback in a compact form factor.

Special Wavelengths
If your operation wavelengths are out of the common communication band and use special fibers, it is often costly to make new VOA components with special anti-reflection coatings.  We have overcome this hurdle with our unique Fiber-Fiber direct coupling technology, offering the lowest cost and the fastest delivery in the industry.

Low Optical Loss
If your operation requires VOA with optical loss as small as possible,  our Fiber-Fiber VOA is nearly lossless.   0.005 dB insertion loss version is available for purchase.

Large Attenuation
For applications that require large attenuations, we uniquely produce MEMS VOA and Fiber-Fiber VOAs that can reach 80dB light blocking level.

Fast Response
We lead the market in high-speed VOAs.  Compact integrated modules that take out optical power spike or regulate the optical power are available.

High Optical Power
For high optical power applications, we uniquely produce High Power VOA up to 20 W.

Small Size
We produce the smallest VOA on the market, with a diameter of only 3.2 mm.