Spatially dispersive displacement sensor utilizing a semiconductor gain chip

We demonstrate the development of a simply equipped displacement sensor utilizing spatially dispersive confocal technology. It feeds the amplified spontaneous emission (ASE) of a laser diode to a wavelength-selective feedback structure that corresponds to the position of a measured surface. The disp...

Full description

Saved in:
Bibliographic Details
Published in:Applied optics (2004) 2007-02, Vol.46 (5), p.680-684
Main Authors: Horng, Ji-Bin, Chou, Wei-Yang, Tsau, Seth, Liao, Jay, Hsu, Shih-Ming, Chen, Chih-Li, Chang, Kun-Chieh, Su, Yan-Kuin
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate the development of a simply equipped displacement sensor utilizing spatially dispersive confocal technology. It feeds the amplified spontaneous emission (ASE) of a laser diode to a wavelength-selective feedback structure that corresponds to the position of a measured surface. The displacement sensor has a detecting range of 4 microm and precision of less than 2 nm, as proven by the analysis of the spectral shifts of the multipassed amplified output ASE. As compared with traditional sensors, the displacement sensor presented in our study requires fewer components and has as high precision as complex systems and a higher measurement rate due to the simpler strategy of displacement determination.
ISSN:1559-128X
DOI:10.1364/AO.46.000680