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Optical Engineering

Second-harmonic generation using an a axis Nd:MgO:LiNbO3 single crystal fiber with Mg-ion indiffused cladding
Author(s): Wenxiu Que; Yan Zhou; Yee Loy Lam; Yuen Chuen Chan; Chan Hin Kam; Yujing Huo; Xi Yao
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Paper Abstract

We report the implementation of a low-loss core-cladding waveguide structure of an a axis Nd:MgO:LiNbO3 single-crystal fiber with a step refractive index profile and the demonstration of a frequency- doubled laser made from such a cladded crystal fiber. The laser-heated pedestal-grown a axis single-crystal fiber, with an elliptical crosssectional area of 200x 150?m, is further shown with a Mg ion indiffusion process. Electron probe microanalysis is used to measure the Mg ion concentration distribution in the Mg-diffused layer. After several trials, diffusion parameters suitable for achieving a core-cladding waveguide structure with a step refractive index profile are obtained. The optical and structural properties of the cladded crystal fibers are also characterized. Room-temperature second-harmonic generation with such a cladded crystal fiber is demonstrated. At room temperature, cw green laser output with a power of 10 ?W at the wavelength of 0.532 ?m is achieved. The origin of the relatively low conversion efficiency is discussed.

Paper Details

Date Published: 1 October 2000
PDF: 6 pages
Opt. Eng. 39(10) doi: 10.1117/1.1290684
Published in: Optical Engineering Volume 39, Issue 10
Show Author Affiliations
Wenxiu Que, Nanyang Technological Univ. (Singapore)
Yan Zhou, Nanyang Technological Univ. (Singapore)
Yee Loy Lam, Nanyang Technological Univ. (Singapore)
Yuen Chuen Chan, Nanyang Technological Univ. (Singapore)
Chan Hin Kam, Nanyang Technological Univ. (Singapore)
Yujing Huo, Tsinghua Univ. (China)
Xi Yao, Xi'an Jiaotong Univ. (China)

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