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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 454–462

Dual colour cw mode-locking through soft aperture based on second order cascaded nonlinearity

Sourabh Mukhopadhyay, Shyamal Mondal, Satya Pratap Singh, Aditya Date, Kamal Hussain, and Prasanta Kumar Datta  »View Author Affiliations

Optics Express, Vol. 21, Issue 1, pp. 454-462 (2013)

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Large nonlinear phase shift achieved by exploiting intracavity second order cascaded nonlinear process in a non-phasematched second harmonic generating crystal is transformed into amplitude modulation through soft aperturing the nonlinear cavity mode variation within the laser gain medium to mode-lock a Nd:YVO4 laser. The laser delivers stable dual wavelength cw mode-locked pulse train with pulse duration 10.3 ps and average power of 1.84 W and 255 mW at 1064 nm and 532 nm respectively for a pump power of 12 W. A comprehensive theoretical analysis finds the regime of self starting and stable cascaded second order mode-locking, inconformity with the experimental result.

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OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.4050) Lasers and laser optics : Mode-locked lasers
(190.0190) Nonlinear optics : Nonlinear optics
(190.3270) Nonlinear optics : Kerr effect
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 19, 2012
Revised Manuscript: December 7, 2012
Manuscript Accepted: December 10, 2012
Published: January 4, 2013

Sourabh Mukhopadhyay, Shyamal Mondal, Satya Pratap Singh, Aditya Date, Kamal Hussain, and Prasanta Kumar Datta, "Dual colour cw mode-locking through soft aperture based on second order cascaded nonlinearity," Opt. Express 21, 454-462 (2013)

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