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Proceedings Paper

Micro-sphere resonator reflector for fiber laser
Author(s): Khanh Kieu; Masud Mansuripur
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Paper 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.

Paper Details

Date Published: 14 February 2007
PDF: 5 pages
Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645211 (14 February 2007); doi: 10.1117/12.703252
Show Author Affiliations
Khanh Kieu, College of Optical Sciences, Univ. of Arizona (United States)
Masud Mansuripur, College of Optical Sciences, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 6452:
Laser Resonators and Beam Control IX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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