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Proceedings Paper

Tunable distributed-feedback sol-gel dye lasers
Author(s): XiaoLei Zhu; Sio Kuan Lam; Dennis Y. Lo
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Paper Abstract

Distributed feedback (DFB) solid state dye laser with optically induced periodic gain modulation is a compact laser capable of tunable lasing from the UV to the near JR. Using E377 dye-doped sol-gel silica as gain medium, pumped by a Q-switched laser at 308nm, DFB laser emission in the near UV has been successfully demonstrated. Wavelength tuning from 367nm to 383nm with an emission spectrum linewidth of 8Opm has been realized by varying the pump beams intersection angle, and a slope efficiency of 4.4% has been obtained. Similarly, DFB laser emission tuning has also been realized by varying the refractive index of the gain material. Wavelength tuning has been first achieved by temperature variation of the R6G doped poly(methyl methacrylate) and sol-gel silica bulk in the DFB structure. Tunable output from 573nm to 556nm has been demonstrated. The thermal coefficients of the refractive index of sol-gel silica have been measured for the temperature ranges of 21°C to 43°C and 43°C to 58°C.

Paper Details

Date Published: 16 April 2001
PDF: 10 pages
Proc. SPIE 4267, Solid State Lasers X, (16 April 2001); doi: 10.1117/12.424600
Show Author Affiliations
XiaoLei Zhu, Chinese Univ. of Hong Kong (Hong Kong)
Sio Kuan Lam, Chinese Univ. of Hong Kong (Hong Kong)
Dennis Y. Lo, Chinese Univ. of Hong Kong (Hong Kong)


Published in SPIE Proceedings Vol. 4267:
Solid State Lasers X
Richard Scheps, Editor(s)

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