Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal

K. Kawamura; T. Kurobori; M. Hirano; H. Hosono

doi:10.1117/12.689536

18 October 2006 Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal

K. Kawamura, T. Kurobori, M. Hirano, H. Hosono

Proceedings Volume 6400, Femtosecond Phenomena and Nonlinear Optics III; 640007 (2006) https://doi.org/10.1117/12.689536
Event: Optics/Photonics in Security and Defence, 2006, Stockholm, Sweden

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.

Citation Download Citation

K. Kawamura, T. Kurobori, M. Hirano, and H. Hosono "Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal", Proc. SPIE 6400, Femtosecond Phenomena and Nonlinear Optics III, 640007 (18 October 2006); https://doi.org/10.1117/12.689536

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