Title :
Transmission edge filters for power equalization of EDFA´s
Author :
Chen, Lawrence R. ; Cooper, David J F ; Smith, Peter W E
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
7/1/2000 12:00:00 AM
Abstract :
We propose and demonstrate the use of transmission edge filters based on apodized linearly chirped fiber Bragg gratings for providing power equalization among different wavelength channels in an erbium-doped fiber amplifier module. The filters we fabricated provide a dynamic range of /spl ap/13 dB, an amplitude variation of /spl plusmn/0.5 dB from an ideal linear edge, and negligible group delay in transmission. Using the grating filters, we demonstrate power equalization, with no observed variation in signal levels after compensation, for three WDM signals having >6-dB difference in power levels before amplification. Our technique can also be extended to provide active power equalization by incorporating a feedback loop.
Keywords :
Bragg gratings; chirp modulation; equalisers; modules; optical fibre amplifiers; optical fibre communication; optical images; optical modulation; optical waveguide filters; telecommunication signalling; wavelength division multiplexing; EDFA; WDM signal; amplitude variation; apodized linearly chirped fiber Bragg gratings; compensation; ctive power equalization; dynamic range; erbium-doped fiber amplifier module; feedback loop; grating filters; ideal linear edge; negligible group delay; power equalization; power levels; signal levels; transmission edge filters; wavelength channels; Active filters; Bragg gratings; Dynamic range; Erbium-doped fiber amplifier; Feedback loop; Fiber gratings; Nonlinear filters; Photonics; Power filters; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
