Abstract
An all-polarization maintaining mode-locked Yb-doped fiber integrated laser with a nonlinear amplifying loop Mirror (NALM) under the operation regime of dissipative soliton resonance (DSR) has been demonstrated. The mode-locked laser can generate DSR pulses at 1.04 μm at the repetition rate of 2.59 MHz. The output DSR pulses can be tuned in pulse width from hundreds of picoseconds to a few nanoseconds by adjusting the pump power. By changing the pump power of the main loop and the NALM, the maximum output average power of 51.4 mW and the corresponding pulse energy about 20 nJ are achieved, respectively. Pulse breaking of the DSR pulses was observed apart from the typical pulse broadening at a fixed pulse peak power due to the peak power clamping effect, while solely increasing the main loop pump power. In addition, the characteristics of the DSR pulses such as pulse width, pulse energy, output power and optical spectrum with the changing of main loop pump power and NALM pump power are also discussed respectively.
Highlights
Generating high energy laser pulses from a passive mode-locked fiber laser is a challenging task since it is limited by soliton area theorems and spectral sideband which lead to pulse breaking with high pump power [1], [2]
By appropriately increasing the main loop pump power and the nonlinear amplifying loop Mirror (NALM) loop pump power, self-started dissipative soliton resonance (DSR) mode-locking state can be obtained at the main loop pump power of 25 mW and NALM pump power of 72 mW
We have experimentally demonstrated the 1040nm polarized DSR pulse in allnormal-dispersion fiber laser based on a NALM
Summary
Generating high energy laser pulses from a passive mode-locked fiber laser is a challenging task since it is limited by soliton area theorems and spectral sideband which lead to pulse breaking with high pump power [1], [2]. We report an all-polarization maintaining mode-locked Yb-doped fiber integrated laser with a NALM under the operation regime of DSR. This is, to the best of our knowledge, the first time to achieve DSR pulses at 1.04 μm by an all-polarization maintaining fiber laser with nonlinear amplifying loop. The output DSR pulses can be tuned in pulse width from hundreds of picoseconds to a few nanoseconds by adjusting the pump power and the maximum output energy is up to 20 nJ The use of this passive mode-locked fiber laser to generate rectangular pulses has significant advantages: (1) All-fiber structure with high reliability. The configuration provides a novel method to obtain linearly-polarized ultrafast laser at flexible pulse width which could be widely used in optical communication [20], [21], material processing [22] and remote sensing [23], [24]
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