期刊
IEEE PHOTONICS JOURNAL
卷 11, 期 5, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2019.2937821
关键词
Fiber lasers; fiber non-linear optics; advanced optics design
资金
- Russian Science Foundation [18-19-00687]
- Russian Science Foundation [18-19-00687] Funding Source: Russian Science Foundation
We demonstrate a Yb-doped hybrid fiber with anomalous dispersion in the 1 mu m spectral range, where asymptotically single-mode behavior is achieved with a differential mode amplification technique. The fiber has a dispersion of 70-100 ps/(nm.km) in the spectral range from 1.020 mu m to 1.055 mu m and a sharp dispersion peak (approximately 400 ps/(nm.km) near 1.064 mu m) caused by the modes anti-crossing. The relatively large hybrid mode field diameter (8 mu m) allows us to demonstrate high-peak-power femtosecond pulse generation via nonlinear chirped pulse compression in both dispersion regimes. Operation near 1.064 mu m allows us to compress narrowband (3 dB spectral width of 2 nm) 6 ps pulses down to a duration of 250 fs with a peak power of 3.3 kW. Operation in the spectral region with a nearly constant anomalous dispersion is found to be optimal for the compression of wideband pulses. In particular, 1 ps pulses centered at 1.03 mu m with a spectral width of approximately 11 nm are compressed down to 90 fs with a peak power of approximately 10 kW, which to the best of our knowledge is the best result for all-fiber (i.e., without external bulk compressors) systems operating near 1 mu m.
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