12 May 2006 Spectral narrowing of solid state lasers by narrow-band PTR Bragg mirrors
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Dramatic spectral narrowing of normally broad band lasers, Ti:Sapphire,Cr:LiSAF, and alexandrite was achieved by simply replacing the output mirror with a reflective, volumetric Bragg grating recorded in photo thermal refractive (PTR) glass. The output power of each laser was changed very slightly from that obtained using dielectric coated output mirrors with the same output coupling as the Bragg grating while spectral brightness increased by about three orders of magnitude.
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T. Chung, T. Chung, A. Rapaport, A. Rapaport, Y. Chen, Y. Chen, V. Smirnov, V. Smirnov, M. Hemmer, M. Hemmer, L. B. Glebov, L. B. Glebov, M. C. Richardson, M. C. Richardson, M. Bass, M. Bass, } "Spectral narrowing of solid state lasers by narrow-band PTR Bragg mirrors", Proc. SPIE 6216, Laser Source and System Technology for Defense and Security II, 621603 (12 May 2006); doi: 10.1117/12.666164; https://doi.org/10.1117/12.666164

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