We report on the investigation of intermode beating mode-locking (IBML) pulse generation in a simple all fiber Tm3+-doped double clad fiber laser (TDFL). This IBML TDFL is implemented by matching longitudinal-mode frequency between 793 nm laser and TDFL without extra mode-locker. The central wavelength of ~1983 nm, the fundamental pulse frequency of ~9.6 MHz, and the signal to noise ratio (SNR) of >50 dB is achieved in this IBML TDFL. With laser cavity optimization, the IBML TDFL can finally generate an average output power of 1.03 W with corresponding pulse energy of ~107 nJ. These results can provide an easily accessible way to develop compact large energy, high power TDFLs.
Zhang Jiaji, Wu Duanduan, Zhao Ruwei, Wang Rongping, Dai Shixun. Generation of 100 nJ pulse, 1 W average power at 2 µm from an intermode beating mode-locking all fiber laser[J]. High Power Laser Science and Engineering, , (): .