Accuracy improvement of terminal voltage self‐coupled laser distance sensor. Issue 2 (11th December 2020)

• Record Type: Journal Article
• Authors: Ohba, Tatsuya; Mizushima, Daisuke; Goshima, Keishiro; Tsuda, Norio; Yamada, Jun
• Is Part Of: Electronics and communications in Japan. Volume 104:Issue 2(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-11
• Subjects: distance measurement sensor -- self‐coupling effect -- semiconductor laser -- vertical cavity surface emitting laser; Electronics -- Periodicals; Telecommunication -- Periodicals; 621.6805
• DOI: 10.1002/ecj.12298
• Languages: English
• ISSNs: 1942-9533

Abstract

Abstract: Measurements performed using the self‐coupling effect of a semiconductor laser utilize an external resonator by exploiting the reflected light from the surface of an object. The improvement of the measurement accuracy due to the use of self‐coupled signals acquired from terminal voltages has not been thoroughly investigated. The current that flows through a semiconductor laser is adjusted so that its wavelength changes at a specific rate when it is modulated using an arbitrary waveform. As such, the spread of the self‐coupled signal is suppressed, and precision is improved. In addition, the accuracy is improved by considering the influence of lenses on the optical path.