Compact 35µm fiber coupled diode laser module based on dense wavelength division multiplexing of NBA mini-bars

U. Witte; M. Traub; A. Di Meo; M. Hamann; D. Rubel; S. Hengesbach; D. Hoffmann

doi:10.1117/12.2211157

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4 March 2016 Compact 35μm fiber coupled diode laser module based on dense wavelength division multiplexing of NBA mini-bars

U. Witte, M. Traub, A. Di Meo, M. Hamann, D. Rubel, S. Hengesbach, D. Hoffmann

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Proceedings Volume 9733, High-Power Diode Laser Technology and Applications XIV; 97330H (2016) https://doi.org/10.1117/12.2211157
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

We present a compact, modular and cross talk free approach for dense wavelength division multiplexing of high power diode lasers based on ultra-steep dielectric filters. The mini bars consist of 5 narrow stripe broad area emitters with a beam parameter product in the range of 2 mm mrad and a wavelength spacing of 2.5 nm between 2 adjacent emitters. Experimental results for fiber coupling (35 μm core diameter, NA < 0.2) of internally and externally stabilized diode lasers are presented. Optical losses are analyzed and alternative optical designs to overcome the current limitations of the setup are discussed.

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U. Witte, M. Traub, A. Di Meo, M. Hamann, D. Rubel, S. Hengesbach, and D. Hoffmann "Compact 35μm fiber coupled diode laser module based on dense wavelength division multiplexing of NBA mini-bars", Proc. SPIE 9733, High-Power Diode Laser Technology and Applications XIV, 97330H (4 March 2016); https://doi.org/10.1117/12.2211157

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