1 October 2000 Second-harmonic generation using an a axis Nd:MgO:LiNbO3 single crystal fiber with Mg-ion indiffused cladding
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Optical Engineering, 39(10), (2000). doi:10.1117/1.1290684
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.
Wenxiu Que, Yan Zhou, Yee Loy Lam, Yuen Chuen Chan, Chan Hin Kam, Yujing Huo, Xi Yao, "Second-harmonic generation using an a axis Nd:MgO:LiNbO3 single crystal fiber with Mg-ion indiffused cladding," Optical Engineering 39(10), (1 October 2000). http://dx.doi.org/10.1117/1.1290684
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KEYWORDS
Crystals

Ions

Magnesium

Laser crystals

Diffusion

Structured optical fibers

Second-harmonic generation

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