Femtosecond laser interferometric processing of Nd:GGG planar optical waveguide

被引：0

作者：

Oi, K ^{[1
]}

Obara, M ^{[1
]}

Sumiyoshi, T ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Elect & Elect Engn, Kohoku Ku, Yokohama, Kanagawa 2138522, Japan

来源：

PHOTON PROCESSING IN MICROELECTRONICS AND PHOTONICS II | 2003年 / 4977卷

关键词：

interferometric ablation; femtosecond laser processing; grating coupler; waveguide laser; neodymium doped gallium gadolinium garnet;

D O I：

10.1117/12.479243

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface relief type gratings for input laser coupling were fabricated on the PLD deposited 2 at. % Nd:GGG thin film optical waveguide by femtosecond laser interferometric processing. The. morphology and coupling efficiency were experimentally evaluated. A clear periodic structure with a fringe period of similar to 800 nm and height of similar to 100 nm was obtained for a surface relief type grating induced on the target surface with a fluence of 0.92 Jcm(-2). The coupling efficiency of an 808 nm-centered laser diode pumping light into the 1.35 mum thick film was measured as a function of the incident angle. Three coupling peaks were observed at 57degrees, 65degrees and 77degrees, each being the coupling to the TE0, TE1 and TE2 modes respectively. Each peak had a large FWHM and a maximum coupling efficiency was 3 %.

引用

页码：381 / 385

页数：5

共 17 条

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