We describe an important second-order effect in the counter-phase optical interference cancellation system [also referred to as the opto-cancellation system (OCS)]. The uniformity of signal cancellation provided by the OCS, across a nonzero instantaneous bandwidth, is limited due to Vπmismatches in the electro-optic modulators comprising the system. The effect of these mismatches on the cancellation is examined quantitatively.
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Suarez et al. (2011) studied this question.
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