PURPOSE: To obtain an accurate, simple, and rapid portable optical circuit checker with a high S/N ratio and a wide dynamic range which can indirectly and visually confirm presence or absence of disconnection of an optical circuit which is constituted of a waveguide path such as an optical fiber by including an optical noise generation source such as an optical fiber amplifier halfway.
CONSTITUTION: The outer terminal of optical connectors 9 and 10 which are adhered to the side wall of a portable equipment enclosure β is formed to be connected and removed easily at one touch by a transmission/reception terminal. Then, an photoelectric conversion part α 1 with a signal light source 1 which is modulated directly or indirectly by a certain frequency F and a means 5 for extracting electrical signal strength of a frequency is connected to the inner terminal of the optical connectors 9 and 10 and is incorporated in the equipment enclosure β, thus detecting presence or absence of disconnection of an optical circuit 3 to be measured.
EDAKAWA NOBORU
YAMAMOTO SHU
WAKABAYASHI HIROHARU
