IEEJ Transactions on Electronics, Information and Systems
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
<Systems, Instrument, Control>
Self-coupling Distance Sensor using a Terminal Voltage Change of the Semiconductor Laser
Takeshi YoshimatsuKeishiro GoshimaNorio TsudaJun Yamada
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2014 Volume 134 Issue 12 Pages 1796-1801


Demand for compact and simple sensor with high accuracy in the production line is increasing. A compact sensor using a self-coupling effect of the semiconductor laser has been studied. A measurement method which can detect self-coupling effect from change in terminal voltage of semiconductor laser without photodiode is proposed. It is confirmed that this sensor using terminal voltage change can measure a distance as same as sensor with photodiode. The measurable distance of this sensor is shorter than that with the photodiode. However, this sensor can be used as a shape measuring sensor with high accuracy by closely arranging semiconductor laser in a two-dimensional array.

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© 2014 by the Institute of Electrical Engineers of Japan
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