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30 December 2019 High-power single-frequency 620 nm diamond laser
Xuezong Yang, Ondrej Kitzler, David J. Spence, Robert J. Williams, Richard P. Mildren
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Proceedings Volume 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019; 112001G (2019) https://doi.org/10.1117/12.2539013
Event: ANZCOP, 2019, Melbourne, Australia
Abstract
High-power single-longitudinal-mode (SLM) lasers are crucial for applications such as LIGO, sodium guide stars, isotope separation and atom cooling, but are challenging due to gain profile inhomogeneities and spatial hole burning. This work shows that a SLM 620 nm laser is firstly achieved using a standing-wave diamond Raman resonator with intracavity second harmonic generation (SHG). In addition to the benefits of the spatial hole burning-free gain medium [1], SHG provides a valuable additional mechanism for increasing gain competition and therefore enhancing SLM stability. Nascent secondary modes experience double the nonlinear loss in the SHG crystal due to the role of sum frequency generation with the primary mode [2]. A further feature of the current external standing-wave cavity design is that the cavity is non-resonant at the pump frequency, thereby allowing the laser to be pumped without mutual control of the wavelength and cavity length and by using multi-longitudinal-mode (MLM) lasers with a spacing different to the free-spectral-range of the diamond Raman laser.
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Xuezong Yang, Ondrej Kitzler, David J. Spence, Robert J. Williams, and Richard P. Mildren "High-power single-frequency 620 nm diamond laser", Proc. SPIE 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, 112001G (30 December 2019); https://doi.org/10.1117/12.2539013
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KEYWORDS
Diamond
Second-harmonic generation
High power lasers
Nonlinear crystals
Laser applications
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