Title :
Relaxation of gain narrowing problem in a multi-pass Ti:sapphire laser system using a long wavelength injection method
Author :
Yong Ho Cha ; Kyung Han Hong ; Chang Hee Nam
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
With the advancement of chirped pulse amplification (CPA) and femtosecond Ti:sapphire laser technologies, femtosecond terawatt lasers have been developed and applied to a variety of research fields. Due to their broad gain bandwidth, Ti:sapphire lasers with duration less than 50 fs have been constructed at a terawatt power level by amplifying a femtosecond seed pulse, and the generation of sub 30-fs, multi-terawatt pulses has been successfully achieved using a regenerative pulse shaping technique in the past a few years. While the regenerative pulse shaping has been successful in overcoming the gain narrowing effect in regenerative amplifiers, there has been almost no proper solution for a gain narrowing problem in multi-pass amplifiers. In our work, we propose a long wavelength injection (LWI) method to relax the gain narrowing problem in multipass amplifiers.
Keywords :
chirp modulation; optical modulation; optical pulse generation; sapphire; solid lasers; titanium; 20 fs; 30 fs; broad gain bandwidth; chirped pulse amplification; femtosecond Ti:sapphire laser technologies; femtosecond seed pulse amplification; femtosecond terawatt lasers; fs optical pulse generation; gain narrowing effect; gain narrowing problem relaxation; long wavelength injection method; multi-pass Ti:sapphire laser system; multi-pass amplifiers; regenerative amplifiers; terawatt power level; Autocorrelation; Bandwidth; Optimized production technology; Power amplifiers; Pulse amplifiers; Pulse compression methods; Pulse measurements; Pulse shaping methods; Shape; Space vector pulse width modulation;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.811422