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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CF_4_4

High-Power, Femtosecond Cr:LiCAF Lasers Pumped by Multimode Diodes

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Abstract

Cr3+-doped colquiriite laser media enable efficient diode pumping with low cost diodes, offer broad emission bands in the near infrared that allow generation of sub-10-fs pulses via mode-locking. However, the thermal conductivities of Cr:Colquiriites are almost an order of magnitude lower than Ti:Sapphire limiting the output powers available from Cr:Colquiriite lasers, restricting their functionality [1-4]. The highest average output power obtained from mode-locked Cr:Colquiriites to date is 500 mW [1]. To obtain this, Kopf et al. employed a carefully designed Cr:LiSAF laser with cylindrical cavity mirrors and a very thin crystal with an optimized cooling geometry to minimize thermal effects [1]. The Cr:LiSAF laser produced 110-fs long pulses with 500 mW average power at 150 MHz repetition rate [1]. A 15-W laser diode array was used as the pump source, and the optical-to-optical conversion efficiency of the system was around 3.5% [1].

© 2015 IEEE

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