OPTICAL RECEIVER AND SLICE LEVEL CONTROL METHOD

摘要

An optical receiver includes a first discriminator in which an optimal point of a slice level is set and that compares a received signal to the slice level and discriminately outputs the received signal; a second discriminator that is connected in parallel to the first discriminator, compares the received signal to a slice level, and discriminately outputs the received signal; and a computing device that variably controls the slice level of the first and the second discriminators, respectively. The computing device executes a first process of setting the slice level of the first discriminator to be a predetermined slice level, calculating a pseudo error rate obtained when the slice level of the second discriminator is caused to variably scan, and setting the slice level of the first discriminator within a range in which the error rate does not vary.

主权项

1. An optical receiver comprising:
a first discriminator in which an optimal point of a slice level is set and that compares a received signal to the slice level and discriminately outputs the received signal; a second discriminator that is connected in parallel to the first discriminator, compares the received signal to a slice level, and discriminately outputs the received signal; and a computing device that variably controls the slice level of the first and the second discriminators, respectively, wherein the computing device executes a first process of setting the slice level of the first discriminator to be a predetermined slice level, calculating a pseudo error rate obtained when the slice level of the second discriminator is caused to variably scan, and setting the slice level of the first discriminator within a range in which the error rate does not vary.