Photonics Research, 2019, 7 (5): 05000566, Published Online: May. 5, 2019  

Visible Raman and Brillouin lasers from a microresonator/ZBLAN-fiber hybrid system Download: 680次

Author Affiliations
Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
Abstract
Raman and Brillouin lasers based on a high-quality (high-Q) whispering gallery mode microresonator (WGMR) are usually achieved by employing a tunable single-frequency laser as a pump source. Here, we experimentally demonstrate visible Raman and Brillouin lasers using a compact microresonator/ZrF4 BaF2 LaF3 AlF3 NaF (ZBLAN)-fiber hybrid system by incorporating a WGMR with a fiber-compatible distributed Bragg reflector/fiber Bragg grating to form a Fabry–Perot (F-P) fiber cavity and using a piece of Pr:ZBLAN fiber as gain medium. The high-Q silica-microsphere not only offers a Rayleigh-scattering-induced backreflection to form the 635 nm red laser oscillation in the F-P fiber cavity, but also provides a nonlinear gain in the WGMR itself to generate either stimulated Raman scattering or stimulated Brillouin scattering. Up to six-order cascaded Raman lasers at 0.65 μm, 0.67 μm, 0.69 μm, 0.71 μm, 0.73 μm, and 0.76 μm are achieved, respectively. Moreover, a Brillouin laser at 635.54 nm is clearly observed. This is, to the best of our knowledge, the first demonstration of visible microresonator-based lasers created by combining a Pr:ZBLAN fiber. This structure can effectively extend the laser wavelength in the WGMR to the visible waveband and may find potential applications in underwater communication, biomedical diagnosis, microwave generation, and spectroscopy.

Shuisen Jiang, Changlei Guo, Kaijun Che, Zhengqian Luo, Tuanjie Du, Hongyan Fu, Huiying Xu, Zhiping Cai. Visible Raman and Brillouin lasers from a microresonator/ZBLAN-fiber hybrid system[J]. Photonics Research, 2019, 7(5): 05000566.

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