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Appl Opt. 2013 Jul 1;52(19):4601-7. doi: 10.1364/AO.52.004601.

1.94 μm switchable dual-wavelength Tm3+ fiber laser employing high-birefringence fiber Bragg grating.

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  • 1Key Lab of All Optical Network & Advanced Telecommunication of EMC, Institute of Lightwave Technology, Beijing Jiao Tong University, Beijing 100044, China.


A 1.94 μm switchable dual-wavelength Tm(3+) fiber laser employing two high-birefringence fiber Bragg gratings (HB-FBGs) is demonstrated. The polarization hole burning effect enhanced by the HB-FBG is first observed and adopted to guarantee stable dual-wavelength operation in the spectral region near 2 μm at room temperature. The wavelength spacing between the dual lasing wavelengths is 0.81 nm. The polarization states of the dual-output lasers are orthogonal. By adjusting a polarization controller, a single-wavelength mode operating at one of the dual wavelengths can be selected. The side-mode-suppression ratio of each laser can be greater than 60 dB. The power fluctuation measurement at both operating wavelengths shows that this Tm(3+) fiber laser has good stability.

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