Optical line test system

Abstract

Abstract PURPOSE:To supervise the test of a cable for all over a waveguide path without affecting a communication signal by providing a multiplexer/demultiplexer type optical coupler, a 1XN optical switch and a controller on the way of the optical fiber cable between optical transmission equipments. CONSTITUTION:The 1XN optical switch 11 selects the optical test light insertion port 92 of the multiplexer/demultiplexer type optical coupler 10 by the program control of the controller 14, and connects it to an optical pulse tester 12. The loss characteristic is measured and the fault position is detected in a coated optical fiber conductor 82 to be tested by a test optical pulse from the tester 12. Next, the switch 11 selects a port 94, and similarly conducts a test. By repeating the operation, a large number of coated optical fibers can automatically be tested and supervised for all over the optical fiber cables 31 and 32 between the light transmission terminal stations 1 and 2. By setting the wavelength area of a light receiver of the tester 12 to be a narrow one which does not receive a communication wavelength light, the test can be conducted without affecting communication.

Inventors

• 👤 Nobuo Tomita
• 👤 信夫 富田
• 👤 Sadao Sugimoto
• 👤 杉本　禎男
• 👤 Hiroaki Koga
• 👤 古賀　広昭

Bibliographic Details