Iodine-stabilized laser at telecom wavelength using dual-pitch periodically poled lithium niobate waveguide.

Author(s) Ikeda, K.; Okubo, S.; Wada, M.; Kashiwagi, K.; Yoshii, K.; Inaba, H.; Hong, F.L.
Journal Opt Express
Date Published 2020 Jan 20

We demonstrate the third harmonic generation of a 1542-nm laser using a dual-pitch periodically poled lithium niobate waveguide with a conversion efficiency of 66%/W. The generated 514-nm light is used for saturation spectroscopy of molecular iodine and laser frequency stabilization. The achieved laser frequency stability is 1.1×10 at an average time of 1 s, which is approximately one order of magnitude better than the acetylene-stabilized laser at 1542 nm. Uncertainty evaluation and absolute frequency measurement are also performed. The developed frequency-stabilized laser can be used as a reliable frequency reference at the telecom wavelength for various applications including optical frequency combs and precision interferometric measurement.

DOI 10.1364/OE.381961
ISSN 1094-4087
Citation Opt Express. 2020;28(2):21662178.

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