Gain clamped L-band EDFA using a fiber Bragg grating in two stage configuration
Document Type
Article
Publication Date
1-1-2003
Abstract
A gain clamping technique for the long-wavelength-band erbium-doped fiber amplifier (L-band EDFA) is presented. If uses two circulators and a fiber Bragg grating (FBG) to route a backward amplified spontaneous emission (ASE) from a second-stage amplifier and launch it back into the first stage. The use of a broadband (BB) FBG has shown a better gain clamping effect, compared to a narrowband (NB) FBG. The amplifier gain for the BB FBG set up is clamped at 15.0 dB with a gain variation of less than 0.1 dB for an input power as high as -5 dBm. The use of a BB FBG has also flattened the gain spectrum.
Keywords
Gain clamping, L-band EDFA, Optical amplifier, Population inversion, Two-stage EDFA
Divisions
fac_eng,PHYSICS
Publication Title
Microwave and Optical Technology Letters
Volume
37
Issue
4
Publisher
John Wiley & Sons