High power tunable femtosecond ultraviolet laser source based on an Yb-fiber-laser pumped optical parametric oscillator

Chenglin Gu, Minglie Hu, Jintao Fan, Youjian Song, Bowen Liu, Lu Chai, Chingyue Wang, Derryck T. Reid

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11 Citations (Scopus)


We report a high average power tunable 51 MHz femtosecond ultraviolet (UV) laser source based on an intra-cavity sum frequency mixing optical parametric oscillator (OPO) pumped by a fiber laser. The UV laser is generated by sum frequency generation (SFG) between the second harmonic of a mode-locked Yb-fiber laser and the signal of the OPO. A non-collinear configuration is used in the SFG to compensate the group velocity mismatch, and to increase the SFG conversion efficiency dramatically. Tunable ultraviolet pulses within the wavelength range from 385 to 400 nm have been produced with a maximum average power of 402 mW and a pulse width of 286 fs at 2 W Yb-fiber laser pump, corresponding to 20.1% near-infrared to UV conversion efficiency at 387 nm. To our knowledge, this is the first demonstration of tunable femtosecond UV pulse generation from a fiber laser pumped OPO, and is also the highest average power tunable UV femtosecond pulses from an OPO. (C) 2015 Optical Society of America

Original languageEnglish
Pages (from-to)6181-6186
Number of pages6
JournalOptics Express
Issue number5
Publication statusPublished - 9 Mar 2015



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