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The threshold of a Brillouin fiber ring laser is investigated theoretically and experimentally. It is revealed that the resonance threshold is four times larger than the threshold of stimulated Brillouin scattering for the ring laser. The experimental results are well agreed with the theoretical emulation.
A novel scheme for tunable optical pulse generation based on fiber Sagnac loop was proposed. The repetition rate of optical pulse is twice the frequency of external square wave modulation signal and can be tuned directly by varying modulation frequency. Experimental results agree well with theoretical predictions and simulations.
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