Compact multichannel optical Fourier spectrometer

Anatoliy Manuilskiy; Henrik Andersson; Göran Thungström; Hans-Erik Nilsson

doi:10.1117/12.689653

5 October 2006 Compact multichannel optical Fourier spectrometer

Anatoliy Manuilskiy, Henrik Andersson, Göran Thungström, Hans-Erik Nilsson

Proceedings Volume 6395, Electro-Optical and Infrared Systems: Technology and Applications III; 639504 (2006) https://doi.org/10.1117/12.689653
Event: Optics/Photonics in Security and Defence, 2006, Stockholm, Sweden

Abstract

In this work are shown the principle, first experimental results and a model design of a new type of multi channel Fourier transform (FT) spectrometer for visible (VIS) and infrared (IR) region operating in real time. The main principle of this spectrometer is that measured collected and collimated optical radiation passes through a linear array or matrix of optical Fabry-Perot interferometers. Each interferometer is placed in front of and close to each element of the array detector. By processing the signal the spectrum of the optical radiation can be extracted. This design does not require intermediate optics between interferometer and array detector and allows for a reliable and extremely compact construction. Production cost can be low when a simple wedge type interferometer is integrated with existing array or matrix detectors, e.g. CCD camera. One other benefit is that the shape of the interferometer determines whether the spectrometer is suitable for measuring wide spectra radiation or has the ability to discriminate optical coherent radiation. Experimental results achieved for VIS and NIR range of spectra are promising. The principals of this design can be used for a variety of applications besides as a spectrometer. For example warning systems for lasers and restricted coherency sources and also filtering of optical signals and for measuring the spectral content working in a wide spectral range.

Citation Download Citation

Anatoliy Manuilskiy, Henrik Andersson, Göran Thungström, and Hans-Erik Nilsson "Compact multichannel optical Fourier spectrometer", Proc. SPIE 6395, Electro-Optical and Infrared Systems: Technology and Applications III, 639504 (5 October 2006); https://doi.org/10.1117/12.689653

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KEYWORDS

Interferometers

Sensors

Spectroscopy

Fourier transforms

Detector arrays

Mirrors

Silicon

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