期刊
OPTICS LETTERS
卷 38, 期 17, 页码 3294-3297出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003294
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资金
- National Natural Science Foundation of China [11274203]
- Spanish Ministerio de Ciencia e Innovacion (MICINN) through Consolider Program SAUUL [CSD2007-00013, FIS2009-09522]
- Centro de Laseres-Pulsados (CLPU)
We report on the design and implementation of a prototype of optical waveguides fabricated in Nd:YAG crystals by using femtosecond-laser irradiation. In this prototype, two concentric tubular structures with nearly circular cross sections of different diameters have been inscribed in the Nd:YAG crystals, generating double-cladding waveguides. Under 808 nm optical pumping, waveguide lasers have been realized in the double-cladding structures. Compared with single-cladding waveguides, the concentric tubular structures, benefiting from the large pump area of the outermost cladding, possess both superior laser performance and nearly single-mode beam profile in the inner cladding. Double-cladding waveguides of the same size were fabricated and coated by a thin optical film, and a maximum output power of 384 mW and a slope efficiency of 46.1% were obtained. Since the large diameters of the outer claddings are comparable with those of the optical fibers, this prototype paves a way to construct an integrated single-mode laser system with a direct fiber-waveguide configuration. (C) 2013 Optical Society of America
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