New observations on DUV radiation at 257 nm and 206 nm produced by a picosecond diode pumped thin-disk laser
| Autor: | Ondřej Novák, Tomas Mocek, Hana Turcicova, Michal Chyla, Martin Smrz, Akira Endo, Jiri Muzik, Lukas Roskot |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Sum-frequency generation business.industry Energy conversion efficiency 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics Thin disk law Harmonics Picosecond 0103 physical sciences High harmonic generation 0210 nano-technology business Diode |
| Zdroj: | Optics Express |
| ISSN: | 1094-4087 |
| Popis: | We report new observations on picosecond deep ultraviolet coherent beams generated in a CLBO as the fourth and fifth harmonics of a diode pumped high average power Yb:YAG thin disk laser operating at 77 kHz repetition rate at 1030 nm. The effects of the two-photon absorption were observed, e.g. the modification of phase matching conditions, lowering of the conversion efficiency. The fifth harmonic generation (4ω+1ω) was studied for different time delays between both pump beams and for the case of excess input power of the fundamental. The latter effect suggests a possibility of increasing DUV output at short crystals. The highest output power obtained at 257 nm was 7.6 W and 1 W at 206 nm. To our knowledge these DUV output powers rank among the highest for picosecond pulses at the repetition rate of the order of magnitude of 100 kHz. |
| Databáze: | OpenAIRE |
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