Intensity Modulated Direct Detection Optical Transceiver

摘要

An optical transceiver using a modulator biased to a non-linear region of the modulator's power transfer function can extend the possible transmission distance of intensity modulated direct detection (IMDD) n-level pulse amplitude modulated (PAM-n) signals. A non-linear look-up-table may compensate for non-linear characteristics of the modulator. An adaptive decision threshold look-up-table may be used to provide adaptive decision levels at the receiver.

主权项

1. An optical transmitter system comprising:
a transmission digital processor for outputting a Pulse Amplitude Modulated (PAM) digital transmission signal; a driving component for converting the digital transmission signal into an analog transmission driving signal; and an optical modulator for producing an optical transmission signal based on the analog transmission driving signal by modulating the optical transmission signal in an approximately linear region of an amplitude transfer function of the optical modulator corresponding to a non-linear region of a power transfer function of the optical modulator.