Yunhua Jiang

Broadband high-gain optical parametric chirped- pulse amplification near 780 nm with LBO-I near-degenerate near-collinear phase match

Near-degenerative near-collinear phase-match geometry for broadband optical parametric chirped-pulse amplification (OPCPA) at approximate to 780 nm is calculated in comparison with nondegenerate noncollinear phase-match geometry. In an experiment on LBO-I near-degenerate near-collinear OPCPA, high gain with broad gain bandwidth (approximate to 71 nm, FWHM) at approximate to 780 nm is achieved by using an approximate to 390-nm pumping pulse. The stretched broadband chirped signal pulse near 780 nm is amplified to approximate to 412 mu J with a pumping energy of approximate to 15 mJ, and the total gain is > 3.7 X 10(6), which agrees well with the calculation. For a broadband (covering approximate to 100 nm) chirped signal pulse, the theoretical gain bandwidth has been attained experimentally for the first time. (c) 2005 Society of Photo-Optical Instrumentation Engineers.

Generation and characterization of femtosecond petawatt Ti:sapphire laser

A Ti:sapphire laser with output of 0.89PW/29.0fs based on the scheme of chirped pulse amplification has been developed. The high gain amplification was achieved in large aperture amplifiers by effective suppression of parasitic lasing.

Development of Femtosecond Petawatt Laser Technology

Based on the scheme of chirped pulse amplification, a Ti:sapphire laser facility with output power of 0.89 PW has been developed. The compressed pulse width of ~29.0 fs was achieved by minimizing the dispersion introduced by the optical components. The effective suppression of parasitic lasing ensured the high-gain amplification in large aperture amplifiers.

Compact 120 TW Ti:sapphire laser with a high gain final amplifier

A compact 120 TW/36 fs Ti:sapphire chirped pulse amplification laser was established. Using the pumping pulse with accurate synchronization in final amplifier, 5.98 J/220 ps output was achieved for /spl sim/300 mJ incident pulse, the single amplifier gain reaches /spl sim/20.

Recent progress in table-top multiterawatt laser systems at SIOM

We present a 10-Hz, 23-TW Ti: sapphire laser system based on chirped pulse amplification and a 16.7-TW laser system based on optical parametric chirped pulse amplification for high-field laser physics research at SIOM, CAS.

Broadband spectral shaping in a Ti:sapphire regenerative amplifier

A 0.34-mm thick quartz plate is used in a Ti:sapphire regenerative amplifier for spectral shaping, the bandwidth of the amplified pulse is increased from /spl sim/18 nm to /spl sim/35 nm, and the amplified pulse is compressed to /spl sim/35 fs.

Intense laser source for X-ray laser research and laser-plasma study

For the X-ray laser researching toward shorter wave length, we set up compact short pulse laser facility with high intensive output at the variable pulsewidth from 20 ps to 2.5 ns. Occupying a table smaller than 10 m2 and with output of 2.5 J in 20 ps this facility is reported with the emphasis on the use of X-ray lasers research and laser-plasma study.