A switchable dual-wavelength fiber laser based on phase-shifted fiber Bragg grating combined with Sagnac loop

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.

Keywords

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References

[1] Srivastava M, Venkitesh D, Srinivasan B. Optics and Laser Technology. 2018, 98: 190

[2] Wang X-L, Chen D-R, Ma X-W, Li H-T, Luo S-J. Optoelectronics Letters. 2016, 12: 261

[3] Cheng J-Q, Zhang L-L, Ma Z-J, Qiu J-R. Optics Communications. 2014, 324: 202

[4] Zhang Q-W, Zeng X-L, Pang F-F, Wang T-Y. Journal of Optics. 2012, 14: 233

[5] Luo A-P, Luo Z-C, Xu W-C. IEEE Photonics Journal. 2011, 3: 197

[6] Cao Y, Lu N, Tong Z-R. Optoelectronics Letters. 2013, 9: 0434

[7] Wang T-S, Miao X-F, Zhou X-F, Qian S. Applied Optics. 2012, 51: C111

[8] Feng S-C, Xu O, Lu S-H, Ning T-G, Jian S-S. Optics Communications. 2009, 282: 2165

[9] He X-Y, Wang DN, Liao C-R. Journal of Lightwave Technology. 2011, 29: 842

[10] Huang K-Q, Wang Y, Li Q, Huang C-X, Chen H-Y. Optoelectronics Letters. 2015, 11: 0184

[11] Yin B, Feng S-C, Bai Y-L, Jian S-S. Photonics Technology Letters IEEE. 2014, 26: 1227

[12] Yariv A. IEEE Journal of Quantum Electronics. 2003, 9: 919

[13] Shu X-W, Yu L-Z, Zhao D-H, Bennion I. Optical Society of America Journal B. 2002, 19: 2770

[14] Snyder A W. Journal of the Optical Society of America. 1972, 62: 1267

[15] Ngo N Q. Optics Letters. 2007, 32: 3020-2

[16] Sun G-Y, Zhou Y-W, Hu Y-H, Chung Y-J. Optics Communications. 2011, 284: 1608

[17] Erdogan T. Journal of Lightwave Technology. 1997, 15: 1277