High Power 1.83 GHz Femtosecond Yb-doped Fiber Laser Incorporating Repetition Rate Multipliers

• Published in: Current optics and photonics Vol. 7; no. 6; pp. 732 - 737
• Main Authors: In Chul Park, Eun Kyung Park, Ye Jin Oh, Hoon Jeong, Ji Won Kim, Jeong Sup Lee
• Format: Journal Article
• Language: English
• Published: 01.12.2023
• Subjects: Femtosecond laser; Yb fiber laser; Ultrashort pulse propagation; High repetition rate operation
• ISSN: 2508-7266; 2508-7274
• DOI: 10.3807/COPP.2023.7.6.732

A high-power Yb-doped femtosecond (fs) fiber laser at a repetition rate of 1.83 GHz is reported. By employing a 5-stage repetition rate multiplier, the repetition rate of the mode-locked master oscillator was multiplied from 57.1 MHz to 1.83 GHz. The ultrashort pulse output at 1.83 GHz was amplified in a two-stage Yb-doped fiber amplifier, leading to >100 W of fs laser output with a pulse duration of 290 fs. The theoretical pulse width along the fiber was simulated, showing that it was in good agreement with experimental results. Further improvement in power scaling is discussed.