OPTICAL UNIT, OPTICAL SOURCE CONTROLLING EQUIPMENT, LIGHT INTENSITY CONTROLLING EQUIPMENT, AND OPTICAL COMMUNICATION INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide technology capable of automatically controlling the output power of an optical unit well when it is used as a light source of VCSEL or the like.;SOLUTION: The optical unit is composed of a light source (10) emitting light of certain intensity corresponding to input signals, a diffraction grating (12) which is arranged in the optical path of the light source (10) to reflect light emitted from the light source (10) partially, and a photodetector (14) which receives light reflected from the diffraction grating (12) and outputs electrical signals corresponding to the intensity of the reflected light. A light source control device is composed of the optical unit and a control means (24) which controls the intensity of light emitted from the light source (10) on the basis of electrical signals outputted from the photodetector (14). An optical communication instrument (100) includes the light source control device.;COPYRIGHT: (C)2004,JPO&NCIPI