Open AccessUltranarrow bandwidth pulses from a regeneratively mode-locked fiber laser
Author(s) -
Zhi Zhao,
M. Minty
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.433642
Subject(s) - bandwidth (computing) , materials science , fiber bragg grating , nanosecond , optics , fiber laser , optoelectronics , pulse duration , laser , pulse shaping , erbium , doping , physics , telecommunications , computer science , wavelength
We report on the generation of transform-limited nanosecond pulse with an ultranarrow bandwidth from a regeneratively mode-locked erbium-doped fiber laser. A narrow bandwidth fiber Bragg grating is combined with a bulk amplitude electro-optic modulator to shape pulse evolution inside a ring cavity, and regenerative mode locking is applied to produce a stationary shape of pulses in the nanosecond regime (2.05 ns in duration). Spectral characterization via high bandwidth optoelectronic devices shows that optical pulses have an ultranarrow bandwidth of 220 MHz. Numerical simulation reveals that the shape of the narrow spectral filter has a strong effect on the duration and bandwidth of output pulses.