Nd:YAG laser with passive-active mode-locking

Weijiang Zhao; Zhenlei Chen; Deming Ren; Yanchen Qu; Shuang Mo; Jinjer Huang; Yury M. Andreev; Vadim A. Gorobets; Vladimir O. Petukhov; Aleksei A. Zemlyanov

doi:10.1117/12.802265

29 April 2008 Nd:YAG laser with passive-active mode-locking

Weijiang Zhao, Zhenlei Chen, Deming Ren, Yanchen Qu, Shuang Mo, Jinjer Huang, Yury M. Andreev, Vadim A. Gorobets, Vladimir O. Petukhov, Aleksei A. Zemlyanov

Author Affiliations +

Proceedings Volume 7006, Lasers for Measurements and Information Transfer 2007; 70060A (2008) https://doi.org/10.1117/12.802265
Event: Lasers for Measurements and Information Transfer 2007, 2007, St. Petersburg, Russian Federation

Abstract

All solid-state flash-lamp pumped passive-active mode-locked Nd³⁺:YAG laser is designed and experimentally studded. Saturation absorber Cr⁴⁺:YAG with initial transparency 25 and 47% are used as a passive Q-switcher and acousto-optical fused quartz modulator as an active mode-locker. Efficient length of the laser cavity with fixed mirror positions (1.45 m spaced) is droved by changes of 100% flat mirror for concave mirrors with different focus lengths. Changeable output mirrors with transparencies of 15 and 50% are used. Driving of the cavity parameters, laser and acousto-optical modulator power supply voltages let us to control output pulse train and single pulse parameters. As it goes from the analyses of oscillograms fixed with pyroelectric detector (τ=0.5 ns) and 1 GHz oscilloscope, over 95% of pulse output energy has been mode-locked. Average duration of the pulse train envelope of 5 to 50 single pulses at FWHM has been droved within 50 to 600 ns. When this single pulse duration is controlled but did not exceed 2 ns.

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Weijiang Zhao, Zhenlei Chen, Deming Ren, Yanchen Qu, Shuang Mo, Jinjer Huang, Yury M. Andreev, Vadim A. Gorobets, Vladimir O. Petukhov, and Aleksei A. Zemlyanov "Nd:YAG laser with passive-active mode-locking", Proc. SPIE 7006, Lasers for Measurements and Information Transfer 2007, 70060A (29 April 2008); https://doi.org/10.1117/12.802265

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KEYWORDS

Mode locking

Mirrors

Nd:YAG lasers

Power supplies

Transparency

Pulsed laser operation

Q switching

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