JPH0432053U

JPH0432053U -

Info

Publication number: JPH0432053U
Application number: JP7320990U
Authority: JP
Priority date: 1990-07-10
Filing date: 1990-07-10
Publication date: 1992-03-16

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例の構成を示すブロ
ツク図、第２図は、一実施例の要部である光スイ
ツチの構造を模式的に示す図、第３図は、第２図
の構造の光スイツチの印加電圧に対する光路の切
換え動作を示す図である。第４図は、一実施例の
動作を説明するためのタイミング図、第５図は、
第４図の動作状態における表示図面を示す図、第
６図は、一実施例の動作を説明するためのタイミ
ング図、第７図は、第６図の動作状態における表
示図面を示す図である。第８図は、従来装置の概
略構成を示すブロツク図、第９図は、従来装置の
動作状態における表示画面を示す図、第１０図は
光スイツチの印加電圧に対する光通過特性のドリ
フト変化を説明するための図である。１０……光パルス試験器、１１……パルス光源
、１４……ＥＯスイツチ、２１……受光器、２３
……表示装置、２６……マスク信号出力回路、２
７……極性反転回路。 FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram schematically showing the structure of an optical switch which is the main part of the embodiment, and FIG. FIG. 3 is a diagram showing the optical path switching operation with respect to the applied voltage of the optical switch having the structure of FIG. FIG. 4 is a timing diagram for explaining the operation of one embodiment, and FIG. 5 is a timing diagram for explaining the operation of one embodiment.
FIG. 4 is a diagram showing a display diagram in the operating state, FIG. 6 is a timing diagram for explaining the operation of one embodiment, and FIG. 7 is a diagram showing a display diagram in the operating state of FIG. 6. . Fig. 8 is a block diagram showing a schematic configuration of a conventional device, Fig. 9 is a diagram showing a display screen of the conventional device in an operating state, and Fig. 10 explains drift changes in light transmission characteristics with respect to applied voltage of an optical switch. This is a diagram for 10... Optical pulse tester, 11... Pulse light source, 14... EO switch, 21... Light receiver, 23
... Display device, 26 ... Mask signal output circuit, 2
7...Polarity inversion circuit.

Claims

[Claim for Utility Model Registration] Measuring the transmission characteristics of the optical path to be measured by supplying optical pulses from a pulsed light source to the optical path to be measured and receiving the light returning from the optical path to be measured with a receiver. In the optical pulse tester, the optical path switching of the pulsed light source or the optical receiver with respect to the optical path to be measured is performed via an electro-optic effect type optical switch that can switch the optical path in the same direction regardless of whether positive or negative voltage is applied. An optical pulse tester characterized in that a voltage inverted at predetermined intervals is applied to the optical switch.