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25 January 2001 Continuously pumped all-solid-state laser systems with fiber phase-conjugate mirror
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Proceedings Volume 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (2001) https://doi.org/10.1117/12.414044
Event: XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, 2000, Florence, Italy
Abstract
All-solid-state laser sources are required for numerous applications in industry and science. Scaling of average output power while preserving a diffraction limited beam quality results in high brightness operation. However, conventional laser systems suffer from thermally induced phase distortions in the active medium, which considerably reduce their beam quality. Advanced pumping geometry, diode pumping, as well as active media with high quantum efficiency can reduce the thermal load. But the remaining phase distortions result in a reduction of beam quality. Optical phase conjugate mirrors are suitable to compensate for phase distortions in master oscillator power amplifier systems (MOPA). Stimulated Brillouin scattering in conventional, commercially available silica fibers facilitates reliable and stable phase conjugation. These all-solid state devices reveal an energy reflectivity of almost 90% and require low financial efforts. Moreover, the SBS threshold is determined by the appropriate fiber core diameter. Therefore fiber phase conjugators can be applied in continuously pumped, repetitively q-switched laser systems which usually exhibit smaller peak power in comparison with pulsed pumped systems. A four-pass amplifier arrangement with birefringence compensation was developed. Nearly diffraction limited output with 32 W average power has been achieved at 10 kHz repetition rate. Power scaling up to 100 W seems to be possible.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Enrico Risse, Oliver Mehl, Thomas Riesbeck, Anca Mocofanescu, and Hans Joachim Eichler "Continuously pumped all-solid-state laser systems with fiber phase-conjugate mirror", Proc. SPIE 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (25 January 2001); https://doi.org/10.1117/12.414044
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