Title :
Adaptive gain equalizer in high-index-contrast SiON technology
Author :
Offrein, B.J. ; Horst, F. ; Bona, G.L. ; Germann, R. ; Salemink, H.W.M. ; Beyeler, R.
Author_Institution :
IBM Zurich Res. Lab., Ruschlikon, Switzerland
fDate :
5/1/2000 12:00:00 AM
Abstract :
An adaptive gain equalization filter is presented. The filter is based on the resonant coupler principle, a cascade of power couplers and delay lines. Reconfigurability and tuning is achieved by varying coupling strength and delay line length via the thermo optic effect. A device consisting of seven delay line stages was realized in high-index-contrast silicon-oxynitride technology. This device flattens the ASE spectrum of an EDFA to a ripple of less than 0.5 dB over 35 nm. The on-chip losses are 2 dB.
Keywords :
adaptive equalisers; optical communication equipment; optical couplers; optical delay lines; optical waveguide filters; silicon compounds; superradiance; thermo-optical effects; ASE spectrum; SiON; adaptive gain equalization filter; delay line; erbium doped fiber amplifier; gain flattening; high-index-contrast silicon oxynitride waveguide technology; on-chip loss; power coupler cascade; reconfigurability; resonant coupler; ripple; thermo-optic effect; tuning; wavelength division multiplexing; Adaptive equalizers; Adaptive filters; Delay lines; Erbium-doped fiber amplifier; Optical coupling; Optical filters; Optical losses; Optical tuning; Resonance; Thermooptic effects;
Journal_Title :
Photonics Technology Letters, IEEE
