LIGHT CIRCUIT FOR OPTICAL FIBER ANALYZER

摘要

PURPOSE: To provide an optical fiber analyzer which perform an equivalent operation with one optical isolator by reducing the light loss of the light circuit of an optical fiber analyzer for increasing the distance to be monitored of the optical fiber cable by the optical fiber analyzer. CONSTITUTION: An optical connector cord 503 for taking out the light output of a semiconductor laser 501 which is a light generation element of an optical fiber analyzer is connected to an optical connector cord 505 of a first light input edge of a four-terminal optical circulator 504, an input/output optical connector code 510 of a reflection-type optical fiber amplifier 511 is connected to an in/out optical connector cord 506 of a second light input/output terminal, the terminal of an optical fiber cable to be monitored is connected to an optical connector cord 507 of a third light input/output terminal, and an avalanche photodiode 51 as a photoelectric conversion element is connected to an optical connector cord 508 of a fourth light input/output terminal.