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

Sourabh Mukhopadhyay | Zendy; Shyamal Mondal | Zendy; Satya Pratap Singh | Zendy; Aditya Date | Zendy; Kamal Hussain | Zendy; Prasanta Kumar Datta | Zendy

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

Author(s) -

Sourabh Mukhopadhyay,

Shyamal Mondal,

Satya Pratap Singh,

Aditya Date,

Kamal Hussain,

Prasanta Kumar Datta

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.000454

Subject(s) - optics , laser , mode locking , materials science , nonlinear system , pulse duration , second harmonic generation , power (physics) , nonlinear optics , modulation (music) , amplitude , pulse width modulation , physics , quantum mechanics , acoustics

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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