Ultra-high resolution and compact volume holographic spectrometers

Ali Adibi; Chaoray Hsieh; Omid Momtahan; Majid Badieirostami

doi:10.1117/12.771287

12 February 2008 Ultra-high resolution and compact volume holographic spectrometers

Ali Adibi, Chaoray Hsieh, Omid Momtahan, Majid Badieirostami

Proceedings Volume 6897, Optoelectronic Integrated Circuits X; 689705 (2008) https://doi.org/10.1117/12.771287
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Compact and efficient spectrometers are of great interest for biological and environmental sensing. In this paper, we describe a new class of spectrometers that work based on diffractive properties of spherical beam volume holograms (SBVHs) and cylindrical beam volume holograms (CBVHs). The hologram in these spectrometers acts as a spectral diversity filter (SDF) that maps different input wavelengths onto different locations in the output plane. The main properties of these holographic SDFs and new techniques for removing the ambiguity between incident wavelength (or the input channel) and incident angle (or the input spatial mode) are discussed. By using CBVHs, we show that the spectral mapping of the input beam can be obtained in one direction and the beam can be independently modified in the perpendicular direction. Using this unique property, we demonstrate a spectral wrapping technique to considerably increase the operation spectral range of spectrometers, without sacrificing their resolution. Finally, it is also shown that by combining CBVHs with a Fabry-Perot interferometer, a true two-dimensional spatial-spectral mapping can be formed, and an ultra-high resolution of 0.2 nm with large spectral bandwidth is demonstrated for this tandem spectrometer.

Citation Download Citation

Ali Adibi, Chaoray Hsieh, Omid Momtahan, and Majid Badieirostami "Ultra-high resolution and compact volume holographic spectrometers", Proc. SPIE 6897, Optoelectronic Integrated Circuits X, 689705 (12 February 2008); https://doi.org/10.1117/12.771287

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KEYWORDS

Spectrometers

Holograms

Holography

Volume holography

CCD cameras

Fabry–Perot interferometers

Spectral resolution

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