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Optical Engineering

Wavelength determination of semiconductor lasers: precise but inexpensive
Author(s): Jan Christian Braasch; Wolfgang Holzapfel; Stephan Neuschaefer-Rube
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Paper Abstract

Precise optical wavelength measurements can be performed by use of a novel wavelength sensor. This low-cost sensor consists of a wavelength-sensitive photodiode and a high-precision log ratio amplifier. The center wavelength of monochromatic or narrowband light sources such as semiconductor lasers in the visible or near-infrared wavelength range can be determined. By simultaneously testing the properties of monomode laser diodes with a standard wavemeter, the feasibility and precision of the wavelength sensor are demonstrated. Wavelength variations less than 0.1 nm are detected clearly.

Paper Details

Date Published: 1 May 1995
PDF: 4 pages
Opt. Eng. 34(5) doi: 10.1117/12.201655
Published in: Optical Engineering Volume 34, Issue 5
Show Author Affiliations
Jan Christian Braasch, Univ.-Gesamthochschule Kassel (Germany)
Wolfgang Holzapfel, Univ. of Kassel (Germany)
Stephan Neuschaefer-Rube, Univ. of Kassel (Germany)


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