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Stressed waveguides with tubular depressed-cladding inscribed in phosphate glasses by femtosecond hollow laser beams
Long, Xuewen Bai, Jing Zhao, Wei Stoian, Razvan Hui, Rongqing Cheng, Guanghua
Long, Xuewen
Bai, Jing
Zhao, Wei
Stoian, Razvan
Hui, Rongqing
Cheng, Guanghua
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Abstract
We report on the single-step fabrication of stressed optical waveguides with tubular depressed-refractive-index cladding in phosphate glasses by the use of focused femtosecond hollow laser beams. Tubelike low index regions appear under direct exposure due to material rarefaction following expansion. Strained compacted zones emerged in domains neighboring the tubular track of lower refractive index, and waveguiding occurs mainly within the tube core fabricated by the engineered femtosecond laser beam. The refractive index profile of the optical waveguide was reconstructed from the measured transmitted near-field intensity.
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This is the published version. ©Copyright 2012 Optical Society of America
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2012
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Optical Society of America
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Long, Xuewen, Jing Bai, Wei Zhao, Razvan Stoian, Rongqing Hui, and Guanghua Cheng. "Stressed Waveguides with Tubular Depressed-cladding Inscribed in Phosphate Glasses by Femtosecond Hollow Laser Beams." Optics Letters Opt. Lett. 37.15 (2012): 3138. http://dx.doi.org/10.1364/OL.37.003138