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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CB_1_3

Semiconductor membrane laser concept (MECSEL) applicable to various materials towards new emission wavelengths

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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

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