期刊
OPTICS LETTERS
卷 44, 期 17, 页码 4183-4186出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.004183
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- ConsejoNacional de Ciencia y Tecnologia [2438]
- Tecnologico Nacional de Mexico (TecNM) [5833.19-P]
A long-cavity passively mode-locked thulium-doped all-fiber laser is reported incorporating a tapered acousto-optic tunable bandpass filter (AOTBF). The operation of the AOTBF relies on the intermodal coupling between core and dadding modes when a flexural acoustic wave propagates along an 80 mu m tapered fiber. The filter works in transmission and exhibits a 3 dB bandwidth of 9.02 nm with an insertion loss of 3.4 dB. The laser supports ultrashort pulse generation at a low repetition rate of 784.93 kHz. Optical pulses with 2.43 nm of optical bandwidth and 2.1 ps pulse duration were obtained in a broad tuning range from 1824.77 to 1905.16 nm. (C) 2019 Optical Society of America
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