12 November 2009 Generation of a train of ps-pulses from a diode pumped Nd-laser using electro-optical negative feedback
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Proceedings Volume 7501, International Conference on Ultrafast and Nonlinear Optics 2009; 750107 (2009); doi: 10.1117/12.849944
Event: Ultrafast Nonlinear Optics 2009, 2009, Bourgas, Bulgaria
Abstract
Mode locking with frequency dependent nonlinear mirror of Nd:YAG laser with electro-optical negative feedback has been presented. We use a LBO based nonlinear mirror thermally stabilized at a temperature corresponding to noncritical phase matching of the frequency doubling at 1.064 μm. Employing a resonator polarization output detected by a fast photodiode we control resonator losses through a Pockels cell. By creating a negative feedback we achieved q-switch suppression, thus stabilizing the mode-locking regime. Through a simple theoretical model we derived a relation for the laser parameters for stable laser operation. We achieved a stable train of picosecond pulses grouped in the 200 microsecond pump macropulse. Macropulse output energy is 4 mJ at a pump repetition rate of 400 Hz. The picosecond pulse train frequency determined by the resonator length is 115 MHz.
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A. Gaydardzhiev, D. Draganov, I. Buchvarov, A. Stalnionis, A. Trifonov, T. Fiebig, "Generation of a train of ps-pulses from a diode pumped Nd-laser using electro-optical negative feedback", Proc. SPIE 7501, International Conference on Ultrafast and Nonlinear Optics 2009, 750107 (12 November 2009); doi: 10.1117/12.849944; https://doi.org/10.1117/12.849944
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KEYWORDS
Nonlinear crystals

Mirrors

Negative feedback

Mode locking

Picosecond phenomena

Resonators

Crystals

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