Frequently Asked Questions
Phosphorus doped fiber PDF-5/125PM
It uses a PANDA-type stress-rod design, giving a polarization extinction ratio greater than 20 dB after just 30 m of fiber.
Yes, PDF-5/125PM maintains strong Raman gain (> 5.0 dB/(km·W)), consistent with the standard series, while adding polarization-maintaining performance.
Core diameter is 5 ± 1 µm and cladding diameter is 125 ± 1 µm, matching the standard (non-PM) PDF-5/125 geometry for compatibility.
It's intended for polarization-sensitive Raman lasers and amplifiers, single-frequency Raman-shifted sources, coherent-combining architectures, and PM pump sources for Er-doped fiber amplifiers.
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