偏振相关损耗(Polarization Dependent Loss，PDL)是衡量器件性能对于传输光信 号的偏振态的敏感程度的参量。
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该产品结构紧凑，体积小，具有工作波长范围宽，响应速度快，插损低，偏振相关损耗低等特点。
It's small, can work in the wide area of the wave length, also it react fast, low insertion lose, polarized low lose est.
该器件结构简单、易于制备、响应速度快、偏振相关损耗低且波长可在较大范围内连续可调，具有一定的实用价值。
With the advantage of simple structure, easy to fabricate, quick responding time, low PLD (Polarization Depended Loss) and wide continuous tunable range, the device has certain practical value.
通过如上性能的分析和测试，提出了降低啁啾光纤光栅器件时延波动、相位波动，优化其偏振模色散与偏振相关损耗的方法。
Through these measurement and analyse, bring forward the method to reduce the chirp FBG device's group delay ripple, phase ripple and optimize it's PMD and PDL.
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