A multichannel filter formed by the piezoelectric transducer (PZT)-induced phase shift in a phase-only sampled fiber Bragg grating (FBG) is experimentally demonstrated. The PZT-induced phase shift is stable and the magnitude of the induced phase shift is controllable. As an important application of this multichannel filter, a semiconductor optical amplifier (SOA)-based multiwavelength fiber ring laser is successfully demonstrated.
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Chen et al. (2011) studied this question.
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