L-band erbium-doped fibre amplifier with clamped- and flattened-gain using FBG
Document Type
Article
Publication Date
1-1-2003
Abstract
A gain clamped long wavelength band erbium-doped fibre amplifier (L-band EDFA) based on a ring laser cavity is demonstrated using a fibre-Bragg grating (FBG) at the output end of the amplifier. This new design provides a good gain clamping as well as a gain flattening. The gain is clamped at 16.9 dB with gain variation of less than 0.1 dB from input signal power of -40 to -18 dBm by setting the VOA = 5 dB. Also, the amplifier has the flattest gain spectrum at VOA = 5. The gain variation is less than 1.0 dB within the wavelength range from 1570 to 1600 nm. This gain clamped amplifier also can support a 12 channel WDM system.
Keywords
Fiber Bragg gratings, Laser tuning, Light reflection, Optical design, Optical filters, Optical resolving power, Pumping (laser), Ring lasers, Semiconductor lasers, Spectrum analyzers, Wavelength division multiplexing
Divisions
fac_eng,PHYSICS
Publication Title
Electronics Letters
Volume
39
Issue
17
Publisher
Institution of Engineering and Technology