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Proceedings Paper

Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal
Author(s): K. Kawamura; T. Kurobori; M. Hirano; H. Hosono
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Paper Abstract

Focused infrared femtosecond laser pulses (wavelength ~800 nm, emission pulse duration 100 fs) were employed to fabricate optoelectronic devices such as waveguides, micro-gratings and laser active centers in LiF crystals. F2 color centers of about 2x1018 cm-3 and refractive index change of about 1% at 633 nm were induced by the fs-laser irradiation. This technique was applied to fabricate a distributed-feedback (DFB) F2 color center laser structure inside LiF single crystal. The LiF DFB laser exhibited laser oscillation at 707 nm at room temperature. The slope efficiency of ~10% and beam divergence of ~20 mrad were achieved.

Paper Details

Date Published: 18 October 2006
PDF: 9 pages
Proc. SPIE 6400, Femtosecond Phenomena and Nonlinear Optics III, 640007 (18 October 2006); doi: 10.1117/12.689536
Show Author Affiliations
K. Kawamura, Japan Science and Technology (Japan)
T. Kurobori, Kanazawa Univ. (Japan)
M. Hirano, Japan Science and Technology (Japan)
H. Hosono, Japan Science and Technology (Japan)
Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6400:
Femtosecond Phenomena and Nonlinear Optics III
Sean M. Kirkpatrick; Razvan Stoian, Editor(s)

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