Direct modulation phase-shift-keying system and method

Details Direct modulation phase-shift-keying system and method Direct modulation phase-shift-keying system and method

1990-06-19

1991-09-17

Davie, James W.

Coherent light generators

Particular beam control device

Modulation

H01S 310

Patent

active

050501763

ABSTRACT:
A direct modulation PSK system and method, in a coherent optical fiber transmission system, in which an injection current supplied to a laser diode is adapted to be directly varied is disclosed. In this system or method, a modulating current pulse is superposed on a bias current for the laser diode so that a specified phase condition may be satisfied. Thereby, a differential coding circuit and an external modulator being indispensable for a DPSK system become unnecessary and, in addition, the system becomes less susceptible to the influence of wavelength dispersion than the DPSK system and able to reproduce the carrier.

REFERENCES:
patent: 4884278 (1989-11-01), Nishimoto et al.

Affiliated with

Also associated with

Rating

Direct modulation phase-shift-keying system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct modulation phase-shift-keying system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct modulation phase-shift-keying system and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1923044