Features- Bi-Directional, Inline, Variable Fiber Optical Attenuators (VOA)
- Collimator-Based Manually Variable Attenuation
- 1 m Long Single Mode Fiber Pigtail on Each Side
Thorlabs' Polarization-Maintaining Variable Optical Attenuator (PM VOA) allows the user to manually vary the attenuation of a signal for precise power balancing in fiber circuits or evaluation of the dynamic range of measurement systems. Adjustment of the attenuation is achieved using the thumbscrew on the top of the housing. The attenuator is comprised of an input fiber, collimating lens, blocking device, focusing lens, and output fiber. By turning the thumbscrew, the blocking device is shifted into the beam path, blocking part of the free-space beam (refer to the schematic to the right). Then, a second lens is used to couple light into the output fiber. Therefore, by turning the screw, one can manually alter the coupling efficiency until the desired attenuation is obtained. Specifications- Thermination: FC/PC
- Operating Wavelength: 1310 ± 40 nm and 1550 ± 40 nm
- Attenuation Range: 0.9 – 50 dB
- Attenuation Resolution: 0.15 dB
- Return Loss: 50 dB
- Max Power: 300 mW
- Insertion Loss: <0.9 dB
- Extinction Ratio: >18 dB
- Operating Temperature: -5 to 70 °C
- Storage Temperature: -40 to 85 °C
- Fiber: SM15-PS-U25A
- Fiber Length: 1 m Per Side
- Housing Dimensions: 26 mm x 18 mm x 8 mm
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