title: Linewidth suppression mechanism of self-injection locked single-frequency fiber laser.
abstract: Linewidth suppression mechanism of the self-injection locked single-frequency fiber laser (SFFL) is investigated theoretically and experimentally. An analytical model based on the semi-phenomenological approach is built up to characterize the optical feedback in SFFL. According to the theoretical prediction, the linewidth tends to be reduced with longer external cavity photon lifetime. Experimentally, a 200-Hz linewidth self-injection locked SFFL is achieved with 101 m long delay fiber, which agrees well with the theoretical simulation. The model provides a new perspective to understand the mechanism of linewidth reduction of self-injection locked SFFL.
authors.forename: Xiang
authors.initials: X
authors.lastname: Huang
authors.forename: Qilai
authors.initials: Q
authors.lastname: Zhao
authors.forename: Wei
authors.initials: W
authors.lastname: Lin
authors.forename: Can
authors.initials: C
authors.lastname: Li
authors.forename: Changsheng
authors.initials: C
authors.lastname: Yang
authors.forename: Shupei
authors.initials: S
authors.lastname: Mo
authors.forename: Zhouming
authors.initials: Z
authors.lastname: Feng
authors.forename: Huaqiu
authors.initials: H
authors.lastname: Deng
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Yang
authors.forename: Shanhui
authors.initials: S
authors.lastname: Xu