Stable and high-performance multiwavelength erbium-doped fiber laser based on fiber delay interferometer |
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Authors: | Shuang LIU Junqiang SUN Ping SHUM |
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Affiliation: | 1. Division of Optoelectronic Devices and Integration, Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China;Network Technology Research Centre, Nanyang Technological University, Singapore 637553, Singapore 2. Division of Optoelectronic Devices and Integration, Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China 3. Network Technology Research Centre, Nanyang Technological University, Singapore 637553, Singapore |
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Abstract: | In this paper, we proposed a novel scheme to realize the multiwavelength erbium-doped fiber lasers. By adding a length of dispersion shifted fiber (DSF) in the ring cavity, we can suppress the cavity mode competition resulting from homogeneous line broadening (HLB) effect. In addition, a comb filter based on fiber delay inter-ferometer (DI) is used for frequency selecting. To enhance the extinction ratio while maintaining the free space range (FSR), the proposed isolator-assisted double-pass DI is utilized into the laser cavity, and a stable 7-wavelength simultaneous lasing spaced at 21.5GHz is accordingly achieved with an extinction ratio of higher than 40 dB. The lasers are stable with a maximum power fluctuation per channel of less than 0.6 dB during an hour test. |
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Keywords: | multiwavelength erbium-doped fiber laser delay interferometer (DI) dispersion shifted fiber (DSF) |
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