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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 11476–11487

Yb-fiber-laser-pumped, high-repetition-rate picosecond optical parametric oscillator tunable in the ultraviolet

G. K. Samanta, S. Chaitanya Kumar, A. Aadhi, and M. Ebrahim-Zadeh  »View Author Affiliations


Optics Express, Vol. 22, Issue 10, pp. 11476-11487 (2014)
http://dx.doi.org/10.1364/OE.22.011476


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Abstract

We report a compact tunable 240-MHz picosecond source for the ultraviolet based on intra-cavity frequency doubling of a signal-resonant MgO:sPPLT optical parametric oscillator (OPO), synchronously pumped at 532 nm in the green by the second harmonic of a mode-locked Yb-fiber laser at 80-MHz repetition rate. By deploying a 30-mm-long multi-grating MgO:sPPLT crystal for the OPO and a 5-mm-long BiB3O6 crystal for internal doubling, we have generated tunable UV radiation across 317-340.5 nm, with up to 30 mW at 334.5 nm. The OPO also provides tunable visible signal in the red, across 634-681 nm, and mid-infrared idler radiation over 2429-3298 nm, with as maximum signal power of 800 mW at 642 nm. The signal pulses have a temporal duration of 12 ps at 665 nm and exhibit high spatial beam quality with Gaussian profile. The signal power is recorded to be naturally stable with a fluctuation of 1.4% rms over 14 hours, while UV power degradation has been observed and studied.

© 2014 Optical Society of America

OCIS Codes
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 10, 2014
Revised Manuscript: April 23, 2014
Manuscript Accepted: April 29, 2014
Published: May 5, 2014

Citation
G. K. Samanta, S. Chaitanya Kumar, A. Aadhi, and M. Ebrahim-Zadeh, "Yb-fiber-laser-pumped, high-repetition-rate picosecond optical parametric oscillator tunable in the ultraviolet," Opt. Express 22, 11476-11487 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-10-11476


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