DUO-BINARY OPTICAL TRANSMITTER USING A SEMICONDUCTOR OPTICAL AMPLIFIER, PARTICULARLY FOR HAVING SIGNAL-CROSSED PHASE CHARACTERISTICS OF A DUO-BINARY SIGNAL WITHOUT USING AN ELECTRIC LOW BAND PASS FILTER

PURPOSE: A duo-binary optical transmitter using an SOA(Semiconductor Optical Amplifier), particularly for having signal-crossed phase characteristics of a duo-binary signal without using an electric low band pass filter, is provided to enhance non-linear and distribution characteristics of NRZ(Non R...

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Bibliographische Detailangaben
Hauptverfasser:	OH, YUN JE, LEE, GYU UNG, HWANG, SEONG TAEK, KIM, SEONG GI
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSMISSION
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Beschreibung
Zusammenfassung:	PURPOSE: A duo-binary optical transmitter using an SOA(Semiconductor Optical Amplifier), particularly for having signal-crossed phase characteristics of a duo-binary signal without using an electric low band pass filter, is provided to enhance non-linear and distribution characteristics of NRZ(Non Return to Zero) transmission. CONSTITUTION: An optical source(101) outputs a carrier. A signal generator(102) generates an NRZ data signal. A duo-binary coding unit(103) codes the NRZ electric signal. An SOA(110) modulates a phase of the optical carrier by a gain change according to a bias current applied after being coupled with the coded signal. An optical band pass filter(104) receives a phase-modulated optical signal from the SOA(110), filters it according to a determined band, and outputs a duo-binary optical signal.