Amplified spontaneous emission contrast of CPA laser

• 作 者: 许毅 冷雨欣 林礼煌 王文耀 黄延穗 李儒新 徐至展
• 机 构: State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chi
• 出 处: Chinese Optics Letters
• 发表日期: 2010年01期
• 关键词: sapphire spontaneous suppressed amplification regenerative amplifier hundreds te

The influence on the level of amplified spontaneous emission(ASE) contrast resulting from the different seed pulse energies has been experimentally studied in a 10-TW-level femtosecond Ti:sapphire chirped pulse amplification laser.It is found that,with the seed pulse energy increasing,the ASE pedestal is suppressed more efficiently,and the ASE contrast is improved with a saturable tendency.The measurement of ~2×10~(-8) ASE contrast in the range of more than 50 ps before the main pulse is achieved in the laser.

The influence on the level of amplified spontaneous emission (ASE) contrast resulting from the different seed pulse energies has been experimentally studied in a 10-TW-level femtosecond Ti: sapphire chirped pulse amplification laser. It is found that with the seed pulse energy increasing, the ASE pedestal is suppressed more efficiently, and the ASE contrast is improved with a saturable tendency. The measurement of ~ 2 × 10 -8 ASE contrast in the range of more than 50 ps before the main pulse is achieved in the laser.