DUOBINARY OPTICAL TRANSMITTER
PROBLEM TO BE SOLVED: To solve a problem of dependency caused by a pattern length and a bias position of a Mach-Zhender modulator by removing defect of existing duobinary optical transmitters. SOLUTION: The duobinary optical transmitter includes: a precoder 210 for coding an electrical signal of bin...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | English |
Published |
31.03.2005
|
Edition | 7 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | PROBLEM TO BE SOLVED: To solve a problem of dependency caused by a pattern length and a bias position of a Mach-Zhender modulator by removing defect of existing duobinary optical transmitters. SOLUTION: The duobinary optical transmitter includes: a precoder 210 for coding an electrical signal of binary data; a continuous-wave (CW) light source 230 for generating a CW light; an optical phase modulator 240 for modulating the phase of an optical signal from the CW light source 230 according to an electrical signal outputted from the precoder 210; a birefringent element 250 for applying time delay depending on a polarized state of an input optical signal to an optical signal outputted from the optical phase modulator 240; and a polarizer 260 for permitting only optical signals of a specific polarization direction to transmit therethrough when optical signals outputted from the birefringent element 250 are applied. COPYRIGHT: (C)2005,JPO&NCIPI |
---|---|
Bibliography: | Application Number: JP20040259420 |