Abstract
We present a novel configuration of multiwavelength erbium-doped fiber ring laser (MW-EDFL) using a LiNbO3 multifunction chip for fiber gyros at room temperature. The polarizer incorporating a piece of high-birefringence fiber in the input port of the Y-type chip forms the Lyot periodic filter at intervals of 0.5 nm wavelength. One of two modulators inserted in the ring cavity has been used as frequency shifter by applying a sawtoothed signal, while the output port of the other is used as the output port of the laser. Simultaneous multiwavelength lasing is experimentally demonstrated by applying a sawtoothed signal with the order of 10 kHz to the phase modulator to prevent single-wavelength oscillation. The MW-EDFL output is linearly polarization light that meets the requirement of external modulation for wavelength-division-multiplexing applications.
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