Kerr-lens mode-locked polycrystalline Cr:ZnS femtosecond laser pumped by a monolithic Er:YAG laser

• 作 者: 胡呈峰 朱江峰 王兆华 孙芯彤 魏龙 令维军 董忠 王庆 高春清 魏志义
• 机 构: School of Physics and Optoelectronic Engineering,Xidian University,Beijing National Laboratory for C
• 出 处: Chinese Physics B
• 发表日期: 2004年期
• 关键词: pumped locked oscillator matching sapphire locking operated monolithic mirror fo

We demonstrated a Kerr-lens mode-locked polycrystalline Cr:ZnS laser pumped by a narrow-linewidth linearpolarised monolithic Er:YAG nonplanar ring oscillator operated at 1645 nm. With a 5-mm-thick sapphire plate for intracavity dispersion compensation, a compact and stable Kerr-lens mode-locking operation was realised. The oscillator delivered 125-fs pulses at 2347 nm with an average power of 80 m W. Owing to the special polycrystalline structure of the Cr:ZnS crystal, the second to fourth harmonic generation was observed by random quasi-phase-matching.

We demonstrated a Kerr-lens mode-locked polycrystalline Cr: ZnS laser pumped by a narrow-linewidth linear polarised monolithic Er: YAG nonplanar ring oscillator operated at 1645 nm. With a 5-mm-thick sapphire plate for intracavity dispersion compensation, a compact and The Kerr-lens mode-locking operation was realized. The oscillator delivers 125-fs pulses at 2347 nm with an average power of 80 m W. Owing to the special polycrystalline structure of the Cr: ZnS crystal, the second to fourth harmonic generation was observed by random quasi-phase-matching.