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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 1 — Jan. 1, 2012
  • pp: 115–117

Frequency-modulation-mode-locked optical parametric oscillator

A. Esteban-Martin, G. K. Samanta, Kavita Devi, S. Chaitanya Kumar, and M. Ebrahim-Zadeh  »View Author Affiliations


Optics Letters, Vol. 37, Issue 1, pp. 115-117 (2012)
http://dx.doi.org/10.1364/OL.37.000115


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Abstract

We demonstrate a novel technique for the generation of mode-locked pulses from a continuous-wave (cw) optical parametric oscillator (OPO). The technique is based on the deployment of a phase modulator in combination with an antiresonant ring interferometer internal to a cw OPO, simultaneously providing spectral broadening and phase-to-amplitude feedback modulation. The scheme is implemented in a doubly-resonant cw OPO based on MgO:sPPLT, configured in a standing-wave cavity and pumped at 532 nm. With the phase modulator activated and the cavity length synchronized, a stable train of 800 ps pulses is generated at a repetition rate of 160 MHz. Using single-pass second harmonic generation (SHG) of the OPO output, we observe a four times enhancement in SHG compared with cw operation, confirming the real achievement of energy concentration as a result of mode-locked operation.

© 2012 Optical Society of America

OCIS Codes
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(190.4975) Nonlinear optics : Parametric processes

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 8, 2011
Revised Manuscript: November 11, 2011
Manuscript Accepted: November 15, 2011
Published: December 26, 2011

Citation
A. Esteban-Martin, G. K. Samanta, Kavita Devi, S. Chaitanya Kumar, and M. Ebrahim-Zadeh, "Frequency-modulation-mode-locked optical parametric oscillator," Opt. Lett. 37, 115-117 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-1-115

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