1 kW cw fiber-coupled diode laser with enhanced brightness

1 kW cw fiber-coupled diode laser with enhanced brightness

Guillermo Garre-Werner (a,b), Joan J. Montiel-Ponsoda (a), Volker Raab (c), Gemma Safont (a), Carsten Bree (d), Mindaugas Radziunas (d), Crina Cojocaru (b), Kestutis Staliunas (b,e)

(a) Monocrom S.L., Carrer de la Vilanoveta 6, 08800 Vilanova i la Geltrú, Spain; (b) Physics Department, Universitat Politècnica de Catalunya (UPC), Rambla Sant Nebridi 22, 080222 Terrassa, Barcelona, Spain; (c) Raab-Photonik GmbH, Amundsenstr. 10,14469 Postdam, Germany; (d) Weierstrass Institute for Applied Analysis and Stochastics Leibniz Instite in Forschungsverbund Berlin e.V, Mohrenstrasse 39, 10117 Berlin, Germany; (e) Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain

Presented at

SPIE LASE, 2020, San Francisco, California, United States

Proceedings Volume 11262, High-Power Diode Laser Technology XVIII; 1126202 (2020) https://doi.org/10.1117/12.2546086


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.


[1] Crump, P., Wenzel H., Erbert G., and Tränkle G., “Progress in increasing the maximum achievable output power of broad area diode lasers,” SPIE Proc. Series 8241, no. 82410U, (2012).
[2] Crump, P., Frevert, C., Hösler, H., Bugge, F., Knigge, S., Pittroff, W., … & Tränkle, G., “Cryogenic ultra-high power infrared diode laser bars,” In Novel In-Plane Semiconductor Lasers XIII (Vol. 9002, p. 90021I). International Society for Optics and Photonics (2014).
[3] Strohmaier, S. G., Erbert, G., Rataj, T., Meissner-Schenk, A. H., Loyo-Maldonado, V., Carstens, C., … & Wilkens, M., “Forward development of kW-class power diode laser bars,” In High-Power Diode Laser Technology XVI (Vol. 10514, p. 1051409) International Society for Optics and Photonics (2018).
[4] Balck, A., Baumann, M., Malchus, J., Chacko, R. V., Marfels, S., Witte, U., … & Kösters, A., “700 W blue Fiber-coupled Diode-laser emitting at 450 nm,” In High-Power Diode Laser Technology XVI (Vol. 10514, p. 1051403). International Society for Optics and Photonics (2018).
[5] Dogan, M., Chin, R. H., Fulghum, S., Jacob, J. H., & Chin, A. K., “Efficient pump module coupling> 1kW from a compact detachable fiber,” In High-Power Diode Laser Technology XVI (Vol. 10514, p. 105140K). International Society for Optics and Photonics (2018).
[6] Fan, T. Y., “Laser beam combining for high-power, high-radiance sources,” IEEE Journal of selected topics in Quantum Electronics, 11(3), 567-577 (2005).
[7] Brée, C., Raab, V., Montiel-Ponsoda, J., Garre-Werner, G., Staliunas, K., Bandelow, U., & Radziunas, M., “Beam-combining scheme of high-power broad-area semiconductor lasers with Lyot-filtered reinjection: modeling, simulations, and experiments,” JOSA B, 36(7), 1721-1730 (2019).
[8] Diehl, R., [High-power diode lasers: fundamentals, technology, applications], Springer Science & Business Media, Vol. 78 (2000).
[9] Liu, X., Zhao, W., Xiong, L., & Liu, H. [Packaging of high power semiconductor lasers]. Springer New York, 2015.
[10] LASER MODULE, patent number EP1341275, Miguel Galan, MONOCROM S.L.
[11] Viera, G., Galan, M., Isern, A., Zsolochevsca, O., Leyva, A., & Etzkorn, T. “New features from non-soldered clamp-mounted diode laser bars,” CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005, IEEE (2005).
[12] Bachmann, Friedrich, Peter Loosen, and Reinhart Poprawe, [High power diode lasers: technology and applications], Vol. 128. Springer, (2007).
[13] Yu, J., Guo, L., Wu, H., Wang, Z., Gao, S., & Wu, D., “Optimization of beam transformation system for laser-diode bars,” Optics express, 24(17), 19728-19735 (2016).
[14] Campbell, S., Blomster, O., Pålsson, M., Segref, A., Köhler, B., & Biesenbach, J., “Advances in power-delivery and loss-handling capabilities of small connectors for fibre optic launching of high-power diode lasers,” In High-Power Diode Laser Technology and Applications XI (Vol. 8605, p. 860502). International Society for Optics and Photonics. (2013).
[15] Brée, C., Gailevičius, D., Purlys, V., Werner, G. G., Staliunas, K., Rathsfeld, A., Staliunas, K., Schmidt, G. adn Radziunas, M. “Chirped photonic crystal for spatially filtered optical feedback to a broad-area laser,” Journal of Optics, 20(9), 095804 (2018).
[16] Gawali, S., Gailevičius, D., Garre-Werner, G., Purlys, V., Cojocaru, C., Trull, J., Montiel-Ponsoda, J. and Staliunas, K. “Photonic crystal spatial filtering in broad aperture diode laser,” Applied Physics Letters, 115(14), 141104 (2019).