Micro-sphere resonator reflector for fiber laser

Khanh Kieu; Masud Mansuripur

doi:10.1117/12.703252

14 February 2007 Micro-sphere resonator reflector for fiber laser

Khanh Kieu, Masud Mansuripur

Proceedings Volume 6452, Laser Resonators and Beam Control IX; 645211 (2007) https://doi.org/10.1117/12.703252
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

Abstract

We show that a glass micro-sphere resonator can be used as a wavelength-selective mirror in fiber lasers. Due to their high quality-factor (Q ~10⁸), microsphere resonators possess a narrow reflection bandwidth. This feature enables construction of single-frequency fiber lasers even when the cavity is long. We also propose and demonstrate an active Q-switched fiber laser using a high-Q micro-sphere resonator as the Q-switching element. The laser cavity consists of an Er-doped fiber as the gain medium, a glass micro-sphere reflector (coupled through a fiber taper) at one end of the cavity, and a fiber Bragg grating reflector at the other end. The reflectivity of the micro-sphere is modulated by changing the gap between the micro-sphere and the fiber taper. Active Q-switching is realized by oscillating the micro-sphere in and out of contact with the taper. Nonlinear effects (such as stimulated Raman lasing) were also observed in our setup at relatively low pump powers.

Citation Download Citation

Khanh Kieu and Masud Mansuripur "Micro-sphere resonator reflector for fiber laser", Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645211 (14 February 2007); https://doi.org/10.1117/12.703252

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KEYWORDS

Fiber lasers

Resonators

Mirrors

Laser resonators

Reflectors

Fiber Bragg gratings

Raman spectroscopy

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