期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 33, 期 10, 页码 511-514出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2021.3072152
关键词
Dissipative soliton; soliton; time-stretched; mode-locking; fiber lasers
资金
- National Science Foundation of China [11874040]
- Foundation for Leading Talents of Minhang, Shanghai
By introducing a non-equilibrium saturable absorber into the laser cavity, a new pulse dynamics capable of generating time-stretched dissipative solitons has been demonstrated. The stable nanosecond pulses with exact sech shape can be used as a pump source for optical parametric oscillators, showing potential applications in optical communication, material processing, and biomedicine technology.
New pulse dynamics, which generates time-stretched dissipative soliton, has been analyzed in theory and demonstrated in experiment. With introducing non-equilibrium saturable absorber (SA) into the laser cavity, the time-dependent loss of SA can balance the intracavity dispersion, while gain and nonlinearity assist to stabilize the pulse. The pulse envelop is in exact sech-shape and the duration can be stretched to sub-microsecond by the cavity dispersion. To verify the dynamics, a mode-locked Er-doped fiber laser (EDFL) is fabricated, in which a piece of Tm-doped fiber (TDF) serves as the non-equilibrium SA. The laser delivers stable nanosecond pulse and its temporal intensity is in exact sech(-2) shape. The pulse duration is invariant with the pump power but determined by the cavity length. As large as 155nJ mode-locked pulse has been generated. Furthermore, such mode-locked pulse can serve as ideal pump source to optical parametric oscillators, and will have wide applications in optical communication, material processing and biomedicine technology.
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