Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7929345 | Optics Communications | 2015 | 5 Pages |
Abstract
A new phase-shift laser ranging method is developed by combining the conventional phase-shift ranging and the concept of transponder, in which the passive mirror in a phase-shift laser range-finding system is replaced with an active reflector whose light source power is the same as that at the measurement terminal. As a result, the power of the returned light is inversely proportional to the 2nd instead of the 4th power of the distance being measured. Section 3 indicate that by using the active reflector, the operating distance is dramatically increased without increasing the laser power or lens aperture. With a transmitted power of 20Â mW and an aperture of 100Â mm, the operating distance increased from 1.5Â km to 9.4Â km, and a 15-fold range gain can be forecasted for a transmitted power of 1Â W. This strongly confirms the suitability of the developed phase-shift method with an active reflector for measuring longer distances.
Keywords
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Pengcheng Hu, Liang Yu, Jianting Mei, Jiubin Tan,