670nm Polarization Maintaining In-Line Manual Variable Optical Attenuator

670nm Polarization Maintaining In-Line Manual Variable Optical Attenuator

The 670nm Polarization Maintaining In-Line Manual Variable Optical Attenuator provides adjustable optical attenuation at 670nm while maintaining polarization state using a screw-driven mechanism for continuous and repeatable control. It is built with PM630 polarization maintaining fiber and features a maximum insertion loss of ≤1.5 dB, an attenuation range of 1.5–40 dB, and a minimum return loss of ≥50 dB for stable signal performance. The extinction ratio is ≥18 dB. The all-fiber in-line design requires no external power, allowing direct integration into polarization-sensitive fiber optic systems. The slow axis is aligned to the key by default, with fast axis or both axis options available. It supports a maximum continuous optical power of 100 mW and is suitable for laboratory testing, optical measurement, and polarization-sensitive applications.