PROJECT TITLE :
High-Power Narrow-Band and Polarization-Maintained All Fiber Superfluorescent Source
In this letter, we experimentally investigate the near-diffraction-limited power scaling ability of a high-power narrow-band and polarization-maintained all fiber amplifier chain fed by selecting a tiny portion of a broadband superfluorescent source. By amplifying the filtered laser based on master oscillator power amplifier configuration, a record power of 80zero W is achieved in this type of monolithic amplifier with a slope efficiency as high as 87.seven% in the final amplifier and $M^2$ factor of $sim 1.3$ . The polarization extinction ratio (PER) and 3-dB bandwidth (FWHM) are measured to be >12 dB and zero.2 ± 0.02 nm, respectively. Additional power scaling the amplifier chain, we tend to show that the mode instability result is occurred, which causes sharply deteriorations of the beam quality and PER. Besides, we have a tendency to show that the influence of self-part modulation effect and four-wave-mixing impact ought to conjointly be rigorously thought of to confirm high portion of slim-band energy when more enhances this sort of slim-band architecture.
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