Search by Subject
Search by Institution
Function/Purpose:     An optical attenuator is a device used to reduce the power level of an optical signal. It is mainly used in measuring the index of an optical fiber system, a short-distance telecommunication system’s signal attenuation, and a system test. An ideal optical attenuator will be light, small, precise, stable and easy to operate. The basic types of optical attenuators are fixed, step-wise variable, and continuously variable. A continuously variable optical attenuator is usually used in optical measurement. When measuring the sensitivity of a light receiver, we usually place it near the input end of a light receiver and use it to adjust the power level of the receiving light. Keep the environment clean when using an optical attenuator, and remember to put its protecting cap back when finished. Move and hold it firmly and carefully, and avoid collisions with objects.(Written by YEH, MAO-CHUAN)
Characteristics:     The optical communication industry is one of the target industries of Taiwan in the 21 century. Although Taiwan has just started to develop this industry, the government has adopted many strategies to help it, including advancing a island-wide broadband communication network, developing new technologies for optical communication system, building self-sustaining key component manufacturing capacity, and vertically integrating the broadband and optical communication industries. We hope that in 2005, Taiwan will become the research base of global optical communication products, and that its output will account for 5% of the total global optical communication component output, rising from the current 1%. It is estimated that in 2006, the market size of global optical communication components will reach 43 billion US dollars, with Taiwan take taking 4% of the market share. (Written by YEH, MAO-CHUAN)
Type:     Multiplexing Equipments-Tool and Device
Maker:     NEC Corporation
Place Made:     Tokyo, Japan
Date Made:     1985
Year in Use:     1981-2000
Size:     LENGTH:11.5 cm WIDTH:6 cm HEIGHT:6.3 cm


Text and images are provided by National Science and Technology Museum