2025/01/06 by Zhifeng Shi, Shijie Sun, Qingbo Wang +4
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Nonlinear Photonic Systems #Photonic Crystal and Fiber Optics
paper · doi:10.1364/ol.546790
openalex publication_date 2025/01/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
The generation of high-performance pulses in the 2 μm wavelength range has been widely considered. A Mamyshev oscillator featuring cascaded spectral broadening and offset spectral filtering is an excellent platform for generating high-energy femtosecond pulses. In order to make up for the shortcomings of complex structure and unsuitability for practical use, in this Letter, we present an experimental investigation of an all-fiber thulium-doped Mamyshev oscillator that enables self-starting operation and generates high-performance pulses. The oscillator emits pulses with energy of up to 7.5 nJ, which can be compressed to 350 fs. Furthermore, we investigate the nonlinear dynamics of the multi-pulse state, such as soliton molecules and high-order harmonic mode-locking. The oscillator generates 130th order harmonic mode-locking that corresponds to the repetition rate of 588 MHz, and the signal-to-noise ratio exceeds 60 dB.