FIXED-GAIN SEMICONDUCTOR OPTICAL AMPLIFIER USING RAMAN AMPLIFICATION PRINCIPLE

• Main Authors: HWANG SEONG-TEAK, RI TEISHAKU
• Format: Patent
• Language: English
• Published: 06.01.2005
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; 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; DEVICES USING STIMULATED EMISSION; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a fixed-gain semiconductor optical amplifier using the Ranman amplification principle which has a relatively high gain characteristic and a relatively low noise figure without using a pumping light source for a Raman amplifier. SOLUTION: This fixed-gain semiconductor optical amplifier using the Ranman amplification principle comprises an optical fiber 201 having a Raman gain characteristic, and a fixed-gain semiconductor optical amplifier 202 which supplies pumping light to the optical fiber by using laser oscillation that is oscillated by utilizing a mutually asymmetrical DBR grating formed at an input and an output terminal, and then amplifies signal light which is Raman-amplified by the optical fiber. COPYRIGHT: (C)2005,JPO&NCIPI