Variable Optical Attenuators
The HPLA Series VOA is based on moving fiber technology with a precision motor featuring low optical loss. This broad spectral band is only limited by fiber intrinsic properties and precision/repeatability for fibers with large core sizes up to 2mm in diameter. It is designed for high precision and high fidelity measurements with little optical mode dependence. Conventional light deflections and blockings affect light transmission characteristics, but fiber-fiber technology overcomes this by eliminating coating and Lens. The HPLA has two built-in optical position sensors so that once the VOA attenuation value is set, it will remain at the value regardless of the environment variations. It has a high repeatability of 0.1dB and a high resolution. Once powered, it is a latching device that can be operated in vibration environments.
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: Standard · Controller: USB · Test Wavelength: 1240-1620 · Fiber Type: 105/NA.22 · 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.
Large Core Fiber Variable Attenuator USB/RS232: Optical power control depends on preserving the optical budget through the complete path. The 1240-1620, 1310, 1550, 850 wavelength specification sets source and detector compatibility. The fiber/interface entry (105/NA.22, 200/NA.22, 300/NA.22, 400/NA.22, 600/NA.22, 800/NA.22) must match the connected components.
Large Core Fiber Variable Attenuator USB/RS232: Receiver calibration depends on preserving the optical budget through the complete path. The 1240-1620, 1310, 1550, 850 wavelength specification sets source and detector compatibility. The fiber/interface entry (105/NA.22, 200/NA.22, 300/NA.22, 400/NA.22, 600/NA.22, 800/NA.22) must match the connected components.
System integration
Use these checks to connect Large Core Fiber Variable Attenuator 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: 105/NA.22, 200/NA.22, 300/NA.22, 400/NA.22, 600/NA.22, 800/NA.22 · Fiber Cover: 900um tube, 2 mm Jacket. 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: 1240-1620, 1310, 1550, 850. 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.
Controller: USB, RS232. Match supply voltage, analog or digital command range, connector pinout and default optical state to the instrument interlock. Confirm the unpowered state explicitly — it decides what happens to the link on a power failure.
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Compare Large Core Fiber Variable Attenuator 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 | Large Core Fiber Variable Attenuator USB/RS232 (current) | In-Line Fixed Fiber Attenuator | Linear Digitally Control MEMS Variable Attenuators |
|---|---|---|---|
| Wavelength range | 1240-1620, 1310, 1550, 850 | 780nm, 830nm, 980nm, 1060nm, 1310nm, 1410nm, 1550nm, 1990nm, 2000nm | 1260~1650nm, 460nm, 630nm, 780nm, 850nm, 1060nm, 2000nm |
| Optical performance | Confirm for this model | 1dB, 2dB, 3dB, 5dB, 10dB, 15dB, 20dB | >45dB, >65dB, High Linear >45dB, High Linear >65dB |
| Fiber type | 105/NA.22, 200/NA.22, 300/NA.22, 400/NA.22, 600/NA.22, 800/NA.22 | SMF-28, SM1950, 780HP, SM800, SM980, Hi1060, PM1550, PM1950, PM1310, PM850, PM980, PM780, MM 50/125μm, MM 62.5μm, 105/125μm, PLMA 10/125 | SM 28, 50/125, 62.5/125, SM460, SM600, Hi1060, PM1550, 780HP, PM460, PM630, PM780, PM980, SM2000 |
| Connector / control | USB, RS232 | FC/APC, FC/PC | USB, RS232 |
