Kerr lens mode-locked operation of a Yb:KYW laser

Vladimir L. Kalashnikov; F. Mejid; Igor G. Poloyko; Victor P. Mikhailov

doi:10.1117/12.347694

4 May 1999 Kerr lens mode-locked operation of a Yb:KYW laser

Vladimir L. Kalashnikov, F. Mejid, Igor G. Poloyko, Victor P. Mikhailov

Proceedings Volume 3613, Solid State Lasers VIII; (1999) https://doi.org/10.1117/12.347694
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

Using a modified ABCD-matrix approach accounting for nonlinear refraction in active medium, we determined the ranges of cavity parameters that provide a mode-locking of Yb:KYW-laser in usual z-fold cavity configuration. Taking the cavity parameters that provide a most efficient mode locking and based on fluctuation model, we performed a numerical simulation of laser operation. We used for our calculations the side-band pump power of 6 W at 982 nm with 1 cm X 50 micrometers beam cross section in active medium and the length of 1 cm for KYW crystal. Calculations showed that self-starting operation is possible with these parameters and dispersion compensation allows for bandwidth-limited ultrashort pulse generation. The shortest pulse duration was determined to be approximately 200 fs with self-starting build-up time of 130 microsecond(s) . Such a built-up time is comparable and even shorter than that one for the lasers with semiconductor saturable absorbers. The region of negative dispersion provided by prism pair where a stable ultrashort pulse generation takes place was determined to be (-17000 - -42000) fs².

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Vladimir L. Kalashnikov, F. Mejid, Igor G. Poloyko, and Victor P. Mikhailov "Kerr lens mode-locked operation of a Yb:KYW laser", Proc. SPIE 3613, Solid State Lasers VIII, (4 May 1999); https://doi.org/10.1117/12.347694

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KEYWORDS

Mode locking

Crystals

Dispersion

Prisms

Ytterbium

Mirrors

Pulsed laser operation

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