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Google Patents Digital optical transmitterĭownload PDF Info Publication number US6373611B1 US6373611B1 US09/102,344 US10234498A US6373611B1 US 6373611 B1 US6373611 B1 US 6373611B1 US 10234498 A US10234498 A US 10234498A US 6373611 B1 US6373611 B1 US 6373611B1 Authority US United States Prior art keywords signal digital reverse optical pilot tone Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6373611B1 - Digital optical transmitter US6373611B1 - Digital optical transmitter