WIDE-BAND AMPLIFIER USING ERBIUM-DOPED OPTICAL FIBER

• Main Authors: KANG BYUNGANG, HWANG SEONG-TEAK
• Format: Patent
• Language: English
• Published: 08.07.2004
• 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; ELECTRIC COMMUNICATION TECHNIQUE; 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; TRANSMISSION

PROBLEM TO BE SOLVED: To provide a wide-band amplifier which can reduce the production cost, and can be applied to a miniaturized system. SOLUTION: The amplifier has an erbium-doped optical fiber 320 which is stimulated by primary stimulating light for erbium ion stimulation and 2nd stimulating light for Raman propagate inductive, and amplifies optical signal, a primary pumping light source 340 which outputs the primary stimulating light having a predetermined wavelength for the erbium ion excitation of the erbium-doped optical fiber, a primary wavelength selection coupler 330 through which the optical signal amplified by the erbium-doped optical fiber passes, and inputs the primary stimulating light to the erbium-doped optical fiber, a second pumping light source 360 which outputs the second pumping light having a predetermined wavelength for the Raman propagate inductive of the erbium-doped optical fiber, and a second wavelength selection coupler 350 through which the optical signal amplified by the erbium-doped optical fiber passes, and inputs the second stimulating light to the erbium-doped optical fiber. COPYRIGHT: (C)2004,JPO&NCIPI