title: 1.94 μm switchable dual-wavelength Tm3+ fiber laser employing high-birefringence fiber Bragg grating.
abstract: 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.
authors.affiliation: Key Lab of All Optical Network & Advanced Telecommunication of EMC, Institute of Lightwave Technology, Beijing Jiao Tong University, Beijing 100044, China.
authors.forename: W J
authors.initials: WJ
authors.lastname: Peng
authors.forename: F P
authors.initials: FP
authors.lastname: Yan
authors.forename: Q
authors.initials: Q
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Liu
authors.forename: T
authors.initials: T
authors.lastname: Feng
authors.forename: S Y
authors.initials: SY
authors.lastname: Tan
authors.forename: S C
authors.initials: SC
authors.lastname: Feng
mesh_terms: D001718:Birefringence; D004867:Equipment Design; D005336:Fiber Optic Technology; D007834:Lasers; D055100:Optical Fibers; D009991:Oscillometry / Q000379:methods; D012031:Refractometry / Q000295:instrumentation; D013696:Temperature; D013932:Thulium / Q000737:chemistry*
chemical_list: D013932:Thulium