Joule-class 940-nm diode laser bars for millisecond pulse applications

0456909 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Crump, P. - Frevert, C. - Ginolas, A. - Knigge, S. - Maassdorf, A. - Lotz, J. - Fassbender, W. - Neukum, J. - Körner, J. - Töpfer, T. - Pranovich, Alina - Divoký, Martin - Lucianetti, Antonio - Mocek, Tomáš - Ertel, K. - De Vido, M. - Erbert, G. - Traenkle, G.
Joule-class 940-nm diode laser bars for millisecond pulse applications.
IEEE Photonics Technology Letters. Roč. 27, č. 15 (2015), s. 1663-1666. ISSN 1041-1135. E-ISSN 1941-0174
Grant CEP: GA MŠMT EE2.3.20.0143; GA MŠMT ED2.1.00/01.0027; GA MŠMT EE2.3.30.0057
Grant ostatní: OP VK 6(XE) CZ.1.07/2.3.00/20.0143; HILASE(XE) CZ.1.05/2.1.00/01.0027; OP VK 4 POSTDOK(XE) CZ.1.07/2.3.00/30.0057
Institucionální podpora: RVO:68378271
Klíčová slova: semiconductor laser arrays * power conversion * pulse power systems * pumps * YAG lasers * cryogenics
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.945, rok: 2015

The use of long resonators (for improved thermal and electrical resistance) and advanced facet passivation (for high power) is shown to enable Joule-class pulse emission from single passively cooled 1-cm diode laser bars emitting at 940 nm. Bars on CS-mount deliver pulse energy of 1 J at 60% power conversion efficiency within a 7-nm spectral window, under quasi-continuous wave conditions (1.2 ms 10 Hz). Robustness of device performance is confirmed via burn-in and multisite testing. Joule-per-bar performance is also maintained for conduction cooled monolithic stacked arrays, adapted for bars with long resonators. Although these packages only cool the laser bar via their rear edge, peak power, lateral far field, and spectral width remain consistent with the requirements for pumping solid state lasers and scale as predicted with self-heating. An energy density >10 J/cm(2) is delivered from the stack surface, for brightness >3 MW/(cm(2)-sr).
Trvalý link: http://hdl.handle.net/11104/0257382