Variable Optical Attenuators
This all-fiber variable optical attenuator (VOA) provides near-lossless transmission in its open (transparent) state while enabling electrically controlled attenuation up to 10 dB and handling optical power levels as high as 10 W. It operates by applying precise bending stress to the fiber using a motorized mechanism, allowing controlled attenuation without significantly degrading signal quality, and is designed to maintain a high polarization extinction ratio even under stress. The device offers ultra-broadband performance that preserves the fiber’s intrinsic transmission characteristics and is compatible with various fiber types. It is typically used in feedback control systems with an output tap monitor for precise power regulation, and because generated heat is transferred to the metal base, it must be mounted on an appropriate heat sink for safe and stable operation.
Configuration options
Configure the options below and add your exact build to the enquiry — we confirm the part number and availability.
We confirm the exact part number for your configuration on enquiry.
Type: Normally Open · Test Wavelength: 450 · Fiber Type: SMF-28 · Fiber Cover: 900um tube · Fiber Length: 1.0m · Connector: None
Application context
Application guidance is tied to the configured wavelength, fiber interface and optical-budget fields for this family.
High Power Inline Variable Fiber Attenuator up to 20W USB/RS232: Optical power control depends on preserving the optical budget through the complete path. The 450, 532, 630, 780, 850, 980, 1060, 1310, 1550, 2000 wavelength specification sets source and detector compatibility. The fiber/interface entry (SMF-28, PM1550, 50/125, 62.5/125, 105/125) must match the connected components.
High Power Inline Variable Fiber Attenuator up to 20W USB/RS232: Receiver calibration depends on preserving the optical budget through the complete path. The 450, 532, 630, 780, 850, 980, 1060, 1310, 1550, 2000 wavelength specification sets source and detector compatibility. The fiber/interface entry (SMF-28, PM1550, 50/125, 62.5/125, 105/125) must match the connected components.
System integration
Use these checks to connect High Power Inline Variable Fiber Attenuator up to 20W USB/RS232 to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Fiber Type: SMF-28, PM1550, 50/125, 62.5/125, 105/125 · Fiber Cover: 900um tube. Specify connector polish and fiber architecture together. FC/PC, FC/APC and SMA interfaces, and single-mode, multimode and polarization-maintaining fibers, impose different return-loss, mode-field and alignment requirements.
Test Wavelength: 450, 532, 630, 780, 850, 980, 1060, 1310, 1550, 2000. Check the Variable Optical Attenuators passband, insertion loss, return loss and power handling at the actual source wavelength; a nominal telecom-band label is not a substitute for the configured range.
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Compare High Power Inline Variable Fiber Attenuator up to 20W USB/RS232 with the closest available models in the Variable Optical Attenuators family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | High Power Inline Variable Fiber Attenuator up to 20W USB/RS232 (current) | Fiber Optical Power Regulator / Protector / Noise Reduction | High Speed Premium Variable Fiber Optical Attenuator 350-2400nm, 18dB |
|---|---|---|---|
| Wavelength range | 450, 532, 630, 780, 850, 980, 1060, 1310, 1550, 2000 | Confirm for this model | 1550 nm, 780nm, 850nm, 1310 nm, 1060 nm |
| Optical performance | Confirm for this model | Confirm for this model | Confirm for this model |
| Fiber type | SMF-28, PM1550, 50/125, 62.5/125, 105/125 | Confirm for this model | SMF-28, HI1060, HI780, PM850, PM1550, PM980 |
| Connector / control | None, FC/PC, FC/APC, Special | Confirm for this model | None, FC/APC, Special |
