期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 39, 期 12, 页码 1572-1578出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2003.819529
关键词
long-period fiber gratings; mode-locked lasers; solitons
A novel modelocking technique is presented in which the intensity-dependent mode-coupling dynamics of a long-period fiber grating is used to achieve. modelocking in a passive optical fiber laser. By An appropriate choice of the grating period, a resonant coupling occurs between co-propagating core and cladding modes, causing the low-intensity wings of the pulse to be transferred to the cladding mode and be attenuated. In contrast, the higher intensity peaks of a pulse are detuned from resonance by the nonlinearity and remain largely: unaffected; Numerical.-studies of this pulse-shaping mechanism show that the laser produces. stable mode-locked soliton-like pulses which are limited in bandwidth by the smaller of either the grating transmission bandwidth or amplifier bandwidth.
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