Title :
Elimination of signal distortion and crosstalk from carrier density changes in the shared semiconductor amplifier of multifrequency signal sources
Author :
Doerr, C.R. ; Joyner, C.H. ; Zirngibl, M. ; Stulz, L.W. ; Presby, H.M.
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
The signals from multifrequency sources that utilize a shared semiconductor optical amplifier often exhibit distortion and crosstalk due to carrier density changes in the shared amplifier. We propose a technique that eliminates the signal distortion and crosstalk by keeping the carrier density in the shared amplifier constant via feedforward of the electrical drive signals. We demonstrate the technique using a waveguide grating router multifrequency laser.<>
Keywords :
carrier density; diffraction gratings; light sources; optical communication equipment; optical crosstalk; optical noise; semiconductor lasers; waveguide lasers; carrier density changes; crosstalk; electrical drive signals; feedforward; multifrequency signal sources; shared semiconductor amplifier signal sources; shared semiconductor optical amplifier; signal distortion; waveguide grating router multifrequency laser; Charge carrier density; Crosstalk; Drives; Gratings; Laser noise; Optical amplifiers; Optical distortion; Optical waveguides; Semiconductor optical amplifiers; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
