| ZHAO Xiao-li,LUO Fei,ZHANG Yu-min,MENG Fan-yong,DONG Ming-li.A switchable dual-wavelength fiber laser based on phase-shifted fiber Bragg grating combined with Sagnac loop[J].Optoelectronics Letters,2019,15(2):122-126 |
| A switchable dual-wavelength fiber laser based on phase-shifted fiber Bragg grating combined with Sagnac loop |
| Author Name | Affiliation | | ZHAO Xiao-li | Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China | | LUO Fei | Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China | | ZHANG Yu-min | Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China | | MENG Fan-yong | Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China | | DONG Ming-li | Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China
Beijing Key Laboratory of Optoelectronic Measurement Technology, Beijing Information Science & Technology University, Beijing 100192, China |
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| Abstract: |
| A switchable dual-wavelength erbium-doped fiber (EDF) laser is proposed and demonstrated. The interference filter is achieved by employing a phase-shifted fiber Bragg grating (PSFBG) combined with Sagnac loop structure. By adjusting polarization controller (PC) states, the birefringence effect is introduced to weaken mode competition, then stable and switchable dual-wavelength fiber laser can be realized. Based on coupled-mode theory and transmission matrix, the Sagnac loop transmission characteristics are studied. The experimental results show that the proposed fiber laser can operate in switchable dual-wavelength output mode at room temperature just by simply adjusting PC. The output wavelength range of fiber laser is 1 556.128—1 556.384 nm, the side mode suppression ratio (SMSR) is over 45 dB, and dual-wavelength spacing as small as 0.048 nm is achieved, which can be used in high-fineness dense wavelength division multiplexing (DWDM) systems and similar structures. |
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