Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33495
Title: Tunable multiwavelength optical short pulse generation using cascaded fiber Bragg gratings and an erbium-doped fiber amplifier in a simple self-seeding scheme
Authors: Wang, DN 
Lam, KW
Keywords: Gain-switching
Multiwavelength
Optical short pulses
Self-seeding
Sidemode suppression ratio
Wavelength-tuning
Issue Date: 2004
Publisher: North-Holland
Source: Optics communications, 2004, v. 233, no. 1-3, p. 191-197 How to cite?
Journal: Optics communications 
Abstract: Tunable multiwavelength optical short pulse generation by the use of a self-seeded, gain-switched Fabry-Pérot laser diode is demonstrated. The laser external cavity mainly consists of cascaded fiber Bragg gratings connected with variable optical delay lines, an erbium-doped fiber amplifier, an optical coupler and two circulators. The wavelength elements from the gain-switched laser diode can be flexibly selected and intensified and their temporal feedback to the laser diode can be accurately controlled. As a result, the sidemode suppression ratio of the output pulses is better than 30 dB over the wavelength-tuning range of 27 nm for a dual-wavelength operation and more than 25 dB across 20 nm when the system is operated with three-wavelengths. The system is simple, compact and robust, and the wavelength-tuning can be carried out in a flexible manner, in a sub-mode step and at a constant repetition frequency.
URI: http://hdl.handle.net/10397/33495
ISSN: 0030-4018
EISSN: 1873-0310
DOI: 10.1016/j.optcom.2004.01.020
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