C.G.H. Roeloffzen, F. Horst, et al.
IEEE Photonics Technology Letters
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.
C.G.H. Roeloffzen, F. Horst, et al.
IEEE Photonics Technology Letters
Jonas Weiss, Tobias Lamprecht, et al.
SPIE OPTO 2010
F. Horst, R. Beyeler, et al.
LEOS 1999
B.J. Offrein, R. Germann, et al.
IEEE Journal on Selected Topics in Quantum Electronics