Industrial Technology Research Institute

Yen-Zen Lee

Wen-Chin Lin

Kuo-Tung Tiao

K Roger Lee

Yeh Jin Ching

Victor Hwang

A switch device with a spiral mechanism for optical fiber is disclosed for improved reliablility. It includes: (a) a plurality of non-rotatable optical fibers, each having first end and second ends, the first end of each the non-rotatable optical fiber being provided with a parallel convergent lens, the second end of each the non-rotatable optical fiber being provided with a connector to connect an interface for receiving an optical signal; the plurality of the non-rotatable optical fibers being fixed on a circular fixture; (b) a rotatable optical fiber having first and second ends, wherein the first end of the rotatable optical fiber passes through a fixture hole, and connected with connector for receiving a optical signal, while the second end of the rotatable optical fiber being fixed to a motor; and (c) a spiral pipe made of a rigid material being sleeved on a portion of the rotatable optical fiber between the first and second ends The second end of the rotatable optical fiber is arranged such that it can be connected to the first end of one of the non-rotatable optical fibers without contact to form into a coupling channel within an angular scope of 360 degrees.

Switch device for optical fibers

A system for measuring the strength of fiber optical current in an AC magnetic field by adopting Faraday effect and temperature compensation. In general, the current measurement systems that adopt Faraday effect have the structure including a Faraday element, a polarizer and an analyzer. When a light beam is directed through the Faraday element, the plane of polarization rotates according to the strength of induced magnetic field and Verdet constant in the Faraday element. The rotation affects the optical intensity sensed by the analyzer. The variation on light intensity after passing through the analyzer is converted into an electric current by a optical-electric transducer. But the accuracy of this system this system always affected by the ambient environment, wherein the major factor is the thermal effect of Verdet constant. This invention utilizes thermo-optical sensing device to sense the temperature variation in Faraday element, and furthermore utilizes the sensed variation as means of compensation to regulate the process of current measurement so that will not be affected by ambient temperature.

Growing community of inventors

Chu-Pei, Taiwan

Yen-Zen Lee