Yang Li, Xiulu Hao, Yi An, Yi Zhu, Tianfu Yao, Xianglong Zeng, Pu Zhou. Hundred-watt level high-order mode all-fiberized random distributed feedback Raman fiber laser with high mode purity[J]. Chinese Optics Letters, 2023, 21(2): 021406
- Chinese Optics Letters
- Vol. 21, Issue 2, 021406 (2023)
Fig. 1. (a) Constructions of AIFG. FMF, few-mode fiber; PZT, piezoceramic transducer; RF, radio-frequency source. (b) Output beam profiles of 1130 nm laser at different frequencies.
Fig. 2. (a) Transmission spectrum of LP01 mode at different loaded frequencies; (b) fitted curve between eigenfrequency and wavelength.
Fig. 3. (a) Experimental setup of mode controllable RRFL; (b) refractive index of GRIN FMF; (c) four LP modes supported at both 1080 and 1134 nm.
Fig. 4. (a) Output signal power as a function of pump power and beam spots; (b) spectrum at different output power levels for LP01 and LP11 modes.
Fig. 5. (a) Measured and reconstructed beam profiles as well as calculated mode purity at different power levels; (b) content of the LP01, LP11 modes and the other modes at the highest power; (c) MD results of RRFL recorded every 2 min in 20 min.
Fig. 6. (a) Rising and (b) falling edge of the temporal trace.
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Table 1. Performance Comparison of RRFLs Generating HOMs
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