Wavelength injection locking actively Q-switched random fiber laser based on random phase-shifted fiber Bragg grating and EOM
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Abstract:
In this paper, an actively Q-switched wavelength injection-locking random fiber laser based on random phase-shifted fiber Bragg grating is proposed, and the performance of the laser is verified by experiments. Within the reflection bandwidth of random phase-shifted fiber gratings from 1549.2 to 1549.9nm, different laser modes with stable central wavelength and peak power can be selected by changing the wavelength of the injected light. The power fluctuation within one hour is less than 0.1dBm, and the central wavelength drift is less than 0.02nm. When the pump power increases from 90mW to 300mW, the pulse width decreases from 3.2μs to 1.5μs, and the pulse repetition frequency is 20kHz. The Random fiber laser (RFL) can reach a stable locking state at the lowest pump power of 100mW and the lowest injection power of 3dBm. When the wavelength is locked, the output pulse is a single pulse. On the contrary, the unlocked output pulse is multi-pulse. The laser has the characteristics of high wavelength tunability in the reflection range of random phase shift fiber bragg grating (RPS-FBG), and it can be an ideal light source in the fields of laser imaging and pulse coding.
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Project Supported:
The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
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