550 MHz carbon nanotube mode-locked femtosecond Cr:YAG laser

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 64-67
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201816.061404

摘要

We demonstrate a femtosecond Cr:YAG laser mode-locked by a carbon nanotube saturable absorber mirror (CNT-SAM) at a repetition rate of 550 MHz.By employing the CNT-SAM,which exhibits a modulation depth of 0.51％ and a saturation fluence of 28 μJ/cm2 at 1.5 μm,we achieved a compact bulk Cr:YAG laser with selfstarting mode-locked operation near 1.5 μm,delivering an average output power of up to 147 mW and a pulseduration of 110 fs.To our knowledge,this system provides the highest repetition rate among reported CNT-SAM mode-locked Cr:YAG lasers and the shortest pulse duration among saturable absorber mode-locked Cr:YAG lasers with repetition rates above 500 MHz.