Study on high power green lasers with unstable resonators

OU Tian-you; ZHANG Ning; PANG Qing-sheng; LI Gang

doi:10.3969/j.issn.1001-3806.2012.01.022

LASER TECHNOLOGY > 2012 > 36(1): 87-89,137. > DOI: 10.3969/j.issn.1001-3806.2012.01.022

OU Tian-you, ZHANG Ning, PANG Qing-sheng, LI Gang. Study on high power green lasers with unstable resonators[J]. LASER TECHNOLOGY, 2012, 36(1): 87-89,137. DOI: 10.3969/j.issn.1001-3806.2012.01.022

Citation:

OU Tian-you, ZHANG Ning, PANG Qing-sheng, LI Gang. Study on high power green lasers with unstable resonators[J]. LASER TECHNOLOGY, 2012, 36(1): 87-89,137. DOI: 10.3969/j.issn.1001-3806.2012.01.022

Citation:

OU Tian-you, ZHANG Ning, PANG Qing-sheng, LI Gang. Study on high power green lasers with unstable resonators[J]. LASER TECHNOLOGY, 2012, 36(1): 87-89,137. DOI: 10.3969/j.issn.1001-3806.2012.01.022

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Study on high power green lasers with unstable resonators

1.
61711 Unit, Chinese People's Liberation Army, Kashi 844000, China;
2.
Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China

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Received Date: March 14, 2011
Revised Date: May 16, 2011
Published Date: January 24, 2012

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Abstract

Abstract

In order to improve its laser beam quality,obtain collimated laser beam and provide an excellent high-power green laser source to pump Ti:sapphire,a diode-side-pumped acoustic-optic Q-switched intra-cavity frequency doubling Nd:YAG laser was studied.In the experiment,a convex-plane unstable resonator was adopted assuming the convex mirrors and gain medium thermal lens as a telescope system.Experimental results show that a convex-plane unstable resonator has lager mode volume and better stability.Using a second type phase-matched KTP(KTiOPO4) for intra-cavity frequency doubling,with 200W pump power,42W green laser was output with 109ns pulse width,9.3kHz pulse repetition frequency,less than 2mrad divergent angle,21% optical-optical conversion efficiency and instability less than 2% during 24h work.It is proven that an effective output of green laser can be achieved with an unstable resonator and side pump module.
- lasers,
- unstable cavity,
- green laser,
- convex-plane resonator

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References

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