Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 32, Issue 20, Pages 1311-1314Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2020.3021486
Keywords
Fiber lasers; Laser mode locking; Optical pulses; Optical solitons; Optical pumping; Optical fiber dispersion; Fiber lasers; laser mode locking; optical solitons; bifurcation
Funding
- National Science Foundation of China (NSFC) [11527808, 61975144, 61827821]
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, China [2020GZKF011]
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We investigate on bound-state mode-locking in the close-to-zero dispersion regime of an Er-fiber laser. A two-soliton bound state with 82 fs pulse duration and 0.58 ps pulse separation is achieved. Compound 2+1 type bound state solitons with similar to 100 fs pulse duration has also been observed. Both the double-pulse and the 2+1 type bound states could experience period-doubling bifurcations and exhibit the pumping hysteresis characteristics as the single pulse. To the best of our knowledge, this work provides the first observation of sub-100 fs bound solitons in a fiber laser. Such ultra-short bound state solitons show potential applications of multilevel coding unit for high-capacity telecommuncation systems.
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