期刊
APPLIED SCIENCES-BASEL
卷 12, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/app122010613
关键词
fiber laser; mode-locked laser; soliton; nonlinear amplifying loop mirror
类别
资金
- National Centre for Research and Development (NCBR) [POIR.04.01.01-00-0024/19]
This study presents a research on pulse dynamics in figure-nine Tm-doped all-polarization maintaining fiber laser. The transition from multi-pulse to single-pulse operation was achieved by decreasing the pump power, and thorough characterization of the laser was performed in both states.
We report a study on pulse dynamics in figure-nine Tm-doped all-polarization maintaining fiber laser. We analyzed laser operation from self-starting with multi-pulse dynamic to single-pulse operation by decreasing the pump power from the mode-locking threshold. By choosing a reliable setting of waveplates, our laser was generating pulses at the central wavelength of 1985 nm with a half-width of the spectrum, pulse duration, and pulse energy equal 6.4 nm, 650 fs, 177 pJ for the output port and 19.2 nm, 1279 fs, 57 pJ for the reject port in the single-pulse state. In the multi-pulse state, we recorded optical spectra, temporal waveforms, and average power at both exit ports. By analyzing temporal traces and output to reject port ratio power, we can distinguish between eight states of operation which follow an exact pattern. In the case of the single-pulse regime, we performed a further laser characterization, including relative intensity noise.
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