Suppression of FM-to-AM Conversion in Broadband Third-Harmonic Generation of Nd:Glass Laser

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（4）
• 页码范围: 122-125
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/4/044209

摘要

Frequency modulation to amplitude modulation(FM-to-AM)conversion is important for controlling temporal shapes of high-power Nd:glass lasers in the application of fusion ignition.To suppress this FM-to-AM conversion effect in the process of broadband third-harmonic generation of Nd:glass laser, we report an efficient frequencytripling scheme based on mixing narrowband and broadband pulses.Numerical results show that the FM-to-AM conversion in frequency conversion process can be suppressed effectively.For a required third-harmonic bandwidth of 1 THz, the defined relative modulation a in pulse intensity is as large as 180% in the conventional baseline design, while it will be reduced to only about 20% by using our proposed scheme.