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Proceedings Paper

1 kW cw fiber-coupled diode laser with enhanced brightness
Author(s): Guillermo Garre-Werner; Joan J. Montiel-Ponsoda; Volker Raab; Gemma Safont; Carsten Bree; Mindaugas Radziunas; Crina Cojocaru; Kestutis Staliunas
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Paper Abstract

We developed a 1kW cw fiber-coupled diode laser at 9XX nm by using beam combining of eight high power diode laser bars. To achieve beam combining, we employ Lyot-filtered optical reinjection from an external cavity, which forces lasing of the individual diode laser bars on intertwined frequency combs with overlapping envelopes and enables a high optical coupling efficiency. Unlike other spectral beam combining techniques that are based on the use of grating elements, this technique is insensitive to the thermal drift of the laser diodes. In addition to this, the FWHM spectral width at 1 kW output power is only around 7 nm, which is convenient for wavelength sensitive applications such as pumping.

Paper Details

Date Published: 2 March 2020
PDF: 9 pages
Proc. SPIE 11262, High-Power Diode Laser Technology XVIII, 1126202 (2 March 2020); doi: 10.1117/12.2546086
Show Author Affiliations
Guillermo Garre-Werner, MONOCROM S.L. (Spain)
Univ. Politècnica de Catalunya (Spain)
Joan J. Montiel-Ponsoda, MONOCROM S.L. (Spain)
Volker Raab, Raab-Photonik GmbH (Germany)
Gemma Safont, MONOCROM S.L. (Spain)
Carsten Bree, Weierstrass Institute for Applied Analysys and Stochastics Leibniz Instite in Forschungsverbund Berlin e.V. (Germany)
Mindaugas Radziunas, Weierstrass Institute for Applied Analysys and Stochastics Leibniz Instite in Forschungsverbund Berlin e.V. (Germany)
Crina Cojocaru, Univ. Politècnica de Catalunya (Spain)
Kestutis Staliunas, Univ. Politècnica de Catalunya (Spain)
Institució Catalana de Recerca i Estudis Avançats (Spain)


Published in SPIE Proceedings Vol. 11262:
High-Power Diode Laser Technology XVIII
Mark S. Zediker, Editor(s)

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