Abstract
Since the first realization [1] of a semiconductor disk laser, also called vertical external-cavity surface-emitting laser (VECSEL), the performance of these compact laser systems has been substantially improved. Advantageous properties including high output power, wavelength flexibility due to bandgap engineering, near-diffraction limited beam quality and the possibility to insert intra-cavity elements make them interesting for many applications. The interplay of gain and cavity resonance, the limited charge carrier confinement and the low thermal conductivity of the thick AlAs/AlGaAs distributed Bragg reflector (DBR) lead to a strongly temperature-dependent performance. Strategies such as substrate removal, intra-cavity heat spreaders, flip-chip processes or compound mirrors have improved the thermal management. Abandoning all semiconductor parts of the VECSEL except the active region itself, the heat flow can be further optimized by sandwiching the active region in-between two heat spreaders. Theoretical investigations have shown a great potential of this novel approach [2,3].
© 2017 IEEE
PDF ArticleMore Like This
Hermann Kahle, Jussi-Pekka Penttinen, Hoy-My Phung, Patrik Rajala, Antti Tukiainen, Sanna Ranta, and Mircea Guina
cb_11_3 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2019
Hermann Kahle, Hoy-My Phung, Jussi-Pekka Penttinen, Patrik Rajala, Antti Tukiainen, Sanna Ranta, and Mircea Guina
ATu3P.1 CLEO: Applications and Technology (CLEO:A&T) 2019
Zhou Yang, Alexander R. Albrecht, Jeffrey G. Cederberg, and Mansoor Sheik-Bahae
SM3F.7 CLEO: Science and Innovations (CLEO:S&I) 2015