SILICON-BASED ELECTRO-OPTIC PHASE MODULATOR WITH REDUCED RESIDUAL AMPLITUDE MODULATION

摘要

An arrangement for removing unwanted amplitude modulation from the output ofan electro-optic phase modulator (formed within a silicon-on-insulator (SOI)system) includes resonant filters that are biased on the positive and negativeslopes of the response signal. Therefore, as the amplitude response of one filterdecreases, the amplitude response of the other filter increases, resultingin balancing the output and essentially eliminating amplitude modulation fromthe phase-modulated output signal. In one embodiment, ring resonators (formedin the SOI layer) are used to provide the filtering, where as the number of resonatorsis increased, the performance of the filtering arrangement is improved accordingly.