supported by the National Natural Science Foundation of China (No.601705055);the Zhejiang Province Key Research and Development Program (No.2019C01G1121168)。
A switchable and tunable multi-wavelength Brillouin erbium-doped fiber laser(MWBEFL) is designed and experimentally demonstrated. A Sagnac loop filter is employed as the switcher to obtain the double Brillouin frequen...