AMPLIFIED DOUBLE-COUPLER DOUBLE-RING OPTICAL RESONATORS WITH NEGATIVEOPTICAL GAIN

Optical resonators with a double-coupler and double-ring configuration incorporated into optical amplifiers that have negative gain are anal yzed. The resonators are presented with a unique signal-flow graph tog ether with z-transform variables for sampled optical signals. Their op tical transfer functions are obtained by a graphical technique. The po les and zeroes in the z plane of the transfer functions are examined, which leads to some unique design features of the resonators for optic al-filtering applications.