Passive mode-locking and pulse-shortening capabilities of frequency doubling polarization mirror

N. I. Nikolov; T. Popmintchev; Ivan Ch. Buchvarov; Solomon M. Saltiel

doi:10.1117/12.425180

9 April 2001 Passive mode-locking and pulse-shortening capabilities of frequency doubling polarization mirror

N. I. Nikolov, T. Popmintchev, Ivan Ch. Buchvarov, Solomon M. Saltiel

Proceedings Volume 4397, 11th International School on Quantum Electronics: Laser Physics and Applications; (2001) https://doi.org/10.1117/12.425180
Event: 11th International School on Quantum Electronics: Laser Physics and Applications, 2000, Varna, Bulgaria

Abstract

It is shown that a combination of a polarizer, a type II second harmonic generation (SHG) crystal at nearly phase- matched conditions, and a back reflector has pulse shortening and mode-locking capabilities. The latter are due to the intensity dependent change of the polarization state of the fundamental wave by cascade second-order processes in the nonlinear crystal. This change of polarization state causes nonlinear reflection, when the fundamental wave passes back through the polarizer, i.e. the combination of a polarizer a SHG crystal and a dielectric mirror acts for the fundamental wave as a nonlinear mirror, called by us a frequency doubling polarization mirror (FDPM). The dependence of the properties of the FDPM on the nonlinear characteristics and the orientation of the SHG crystal, as well as on the accumulated phase shift between the second harmonic and the fundamental wave within the space between the nonlinear crystal and the back reflector were investigated.

Citation Download Citation

N. I. Nikolov, T. Popmintchev, Ivan Ch. Buchvarov, and Solomon M. Saltiel "Passive mode-locking and pulse-shortening capabilities of frequency doubling polarization mirror", Proc. SPIE 4397, 11th International School on Quantum Electronics: Laser Physics and Applications, (9 April 2001); https://doi.org/10.1117/12.425180

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KEYWORDS

Second-harmonic generation

Nonlinear crystals

Mirrors

Dielectric polarization

Crystals

Phase shifts

Polarizers

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