DUOBINARY OPTICAL TRANSMITTER

• Main Authors: KIN KUN, HWANG SEONG-TEAK
• Format: Patent
• Language: English
• Published: 31.03.2005
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

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