摘要
We have experimentally presented a watt-level noise-like (NL) pulse mode-locked all-polarization-maintaining(PM) fiber laser centered at ~1995 nm, which can directly generate stable NL pulses with a maximum output power of ~1.017 W and pulse energy of ~0.61 μJ, representing the highest output power of mode-locked NL pulse at 2 μm from any fiber oscillators,to the best of our knowledge. The mode-locked NL pulse laser exhibits an excellent stability with a power fluctuation of~0.1% in 8 h of monitoring, and a signal-to-noise ratio of ~83 dB at a fundamental frequency of ~1.662 MHz. Moreover, the pulse envelope and coherence spike width of the NL pulse can be widely tuned from ~4.5 ns to ~16 ns, and ~364 fs to~323 fs, respectively, with the enhancement of the pump power. Such an all-PM fiber oscillator is the ideal seed source for the implementation of a high-power NL pulse laser and has potential valuable applications in mid-infrared spectroscopy and industrial processing.
基金
supported by the Guangdong Basic and Applied Basic Research Foundation (No.2023A1515111114)
the Key-Area Research and Development Program of Guangdong Province (No.2023B0909010005)
the Fundamental Research Project of Department of Education of Guangdong Province (No.2021ZDJS106)
the Shenzhen Pingshan District Science and Technology Innovation Fund (Nos.PSKG202003,PSKG202007,and KY2022QJKCZ001)。
