LIGHT SOURCE APPARATUS FOR MEASURING TRANSMISSION CHARACTERISTICS

摘要

PURPOSE:To make it possible to accurately and simply measure the transmission characteristics of a multi-mode optical fiber, by providing a coupling optical fiber and a transmission loss measuring optical fiber. CONSTITUTION:The drive part of a light diode 4 is constituted of a capacitor 1, an inductance 2 and a power source 3 so that optical intensity modulation can be applied by DC oscillation or a sine wave electric signal A. The output side of the light diode 4 is coupled with a coupling optical fiber 5 and the emitting end of the optical fiber 5 is coupled with a transmission loss measuring optical fiber 7 or a transmission band measuring optical fiber 8 by an optical switch 6.