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High power diode laser with 23W ex 35 μm fibre

: Witte, U.; Hamann, M.; Meo, A. di; Rubel, D.; Traub, M.; Hoffmann, D.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Photonics Society, Scottish Chapter; European Photonics Industry Consortium -EPIC-:
IEEE High Power Diode Lasers and Systems Conference, HPD 2015. Proceedings : Co-located with Photonex 2015, 14th and 15th October 2015, Coventry, United Kingdom
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4673-9177-1 (Print)
ISBN: 978-1-4673-9178-8 (Electronic)
ISBN: 978-1-4673-9179-5 (Print on Demand)
High Power Diode Lasers and Systems Conference (HPD) <2015, Coventry>
Fraunhofer ILT ()

We present a fibre-coupled diode laser module with an optical output power of 23 W ex 35 μm (NA 0.22). The system is based on dense wavelength division multiplexing of two narrow stripe broad-area diode laser mini-bars in an external resonator. Ultra-steep dielectric edge filters are used. By measuring the optical output power, the spectrum and the degree of polarization with and without external feedback, we determine loss mechanisms of the multiplexing unit.