Narrow linewidth picosecond pulsed laser with mega-watt peak power at UV wavelength

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Optics Express

OSTI ID:1083722

Liu, Yun ^[1]; Huang, Chunning ^[1]; Deibele, Craig Edmond ^[1]

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1. ORNL

We demonstrate a master oscillator power amplifier (MOPA) burst mode laser system to generate 66 ps/402.5 MHz pulses with mega-watt peak power at 355 nm. The seed laser is based on a direct electro-optic modulation of a fiber laser output. A very high extinction ratio (45 dB) has been achieved by using an adaptive bias control. The multi-stage Nd:YAG amplifier system allows a uniformly temporal shaping of macropulses with tunable pulse duration. The light output form the amplifier is converted to 355 nm and over 1 MW UV peak power is obtained when the laser is operating in a 5- s/10-Hz macropulse mode. The laser output has a transform limited spectrum bandwidth with a very narrow linewidth of individual laser mode. The immediate application of the laser system is the laser assisted hydrogen ion beam stripping for the Spallation Neutron Source (SNS).

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1083722
• Journal Information: Optics Express, Vol. 21, Issue 7
• Country of Publication: United States
• Language: English

Related Subjects

MOPA
macropulse
fiber laser
laser stripping
linewidth