Passively Q-switched and Mode-locked All-fiber Yb-doped Laser with β-InSe Saturable Absorber (Invited) [基于β相硒化铟的被动调Q及锁模掺镱光纤激光器(特邀)]

作者：Zhang Z.; Hu H.; Liao J.; Zhu H.; Xie L.; Wang J.^*; Wei Z.

来源：Acta Photonica Sinica, 2021, 50(10): 1014003.

DOI：10.3788/gzxb20215010.1014003

• Fiber lasers
• Indium selenides
• Mode-locked lasers
• Q-switched lasers
• Saturable absorbers

A stable Q-switched and mode-locked Ytterbium Doped Fiber Laser (YDFL) based on layered semiconductor β-InSe as Saturable Absorber (SA) were demonstrated for the first time. The modulation depth and non-saturable absorbance of the SA were 47% and 20%, respectively. After inserting the SA into YDFL, the stable Q-switched pulse operation can be easily obtained with the repetition rate range from 53.42 kHz to 217 kHz. The minimum pulse duration was 630 ns and the maximum single pulse energy was 47.9 nJ. By optimizing the laser resonator, a stable mode-locking pulse with repetition rate of 10.82 MHz, maximum output power of 51.2 mW and maximum single pulse energy of 4.7 nJ can be achieved. The experimental results demonstrated that β-InSe SA has great potential in near infrared ultrafast nonlinear optical.

• 单位
  西安电子科技大学; 中国科学院大学; 清华大学