期刊
OPTICS LETTERS
卷 41, 期 12, 页码 2715-2718出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.002715
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资金
- Ministry of Economy and Competitiveness (MINECO), Spain (nuOPO) [TEC2015- 68234-R]
- Generalitat de Catalunya (AGAUR, SGR)
- Severo Ochoa Excellence [SEV-2015-0522]
- Fundacio Privada Cellex
- ICREA Funding Source: Custom
We report on the generation of ultrafast vortex beams in the deep ultraviolet (DUV) wavelength range at 266 nm, for the first time to our knowledge. Using a Yb-fiber-based green source in combination with two spiral phase plates of orders 1 and 2, we were able to generate picosecond Laguerre-Gaussian (LG) beams at 532 nm. Subsequently, these LG beams were frequency doubled by single-pass, second-harmonic generation in a 10 mm-long beta-BaB2O4 crystal to generate ultrafast vortex beams at 266 nm with a vortex order as high as 12, providing up to 383 mW of DUV power at a single-pass, green-to-DUV conversion efficiency of 5.2%. The generated picosecond UV vortex beam has a spectral width of 1.02 nm with a passive power stability better than 1.2% rms over > 1.5 h. (C) 2016 Optical Society of America
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