Role of recording geometry in the performance of spectral diversity filters with spherical beam volume holograms

Hsieh, Chaoray; Momtahan, Omid; Karbaschi, Arash; Adibi, Ali; Sullivan, Michael E.; Brady, David J.

doi:10.1364/ol.30.000186

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…We recently proposed and demonstrated the feasibility of using spherical beam volume holograms ͑SBVHs͒ as SDFs. 3,4 A SBVH is composed of multiple gratings, and the Bragg condition allows for the conversion of a spatially uniform spectrum into a spatial-spectral pattern with a different spatial distribution for different wavelength channels. 3 It was shown qualitatively that the spectral diversity performance of these holograms depends on the degree of spatial coherence of the input signal.…”

Section: Introductionmentioning

confidence: 99%

Spherical beam volume holograms for spectroscopic applications: modeling and implementation

et al. 2004

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The spherical beam volume hologram, recorded by a plane wave and a spherical beam, is investigated for spectroscopic applications in detail. It is shown that both the diffracted and the transmitted beam can be used for spectroscopy when the hologram is read with a collimated beam. A new method is introduced and used for analysis of the spherical beam volume hologram that can be extended for analysis of arbitrary holograms. Experimental results are consistent with the theoretical study. It is shown that the spherical beam volume hologram can be used in a compact spectroscopic configuration when the transmitted beam is monitored. Also, on the basis of the properties of the spherical beam hologram, the response of a hologram recorded by a plane wave and an arbitrary pattern is predicted. The information can be used to optimize holographic spectrometer design.

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Section: Introductionmentioning

confidence: 99%

Spherical beam volume holograms for spectroscopic applications: modeling and implementation

et al. 2004

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“…As a result, when the reading beam is spatially incoherent (i.e., several incident angles) with multiple wavelengths present, the crescents corresponding to different wavelengths and different incident angles will overlap, resulting in considerable cross talk between different incident wavelength channels. Therefore a trade-off exists between the resolution of the spectrometer and the degree of spatial coherence of the input signal, 2,4 reducing the efficiency of the spectrometer. In this Letter we present for what is believed to be the first time a simple and practical technique with which to solve this ambiguity by use of a Fourier-transform lens.…”

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Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

et al. 2005

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We present a new idea for diffuse source spectroscopy using a Fourier-transform volume holographic spectrometer formed by a Fourier-transform lens, a volume hologram, and a CCD. We show that this spectrometer can operate well under spatially incoherent light illumination. Furthermore, this spectrometer is less bulky, less sensitive to input alignment, and potentially more appropriate for implementation of highly sensitive spectrometers than conventional spectrometers.

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“…As a result, when the reading beam is spatially incoherent (i.e., several incident angles) with multiple wavelengths present, the crescents corresponding to different wavelengths and different incident angles will overlap resulting in considerable crosstalk between different incident wavelength channels. Therefore, a trade-off exists between the resolution of the spectrometer and the degree of spatial coherence of the input signal [2,10]. Here we present a simple and practical technique to solve this ambiguity by using a Fourier transforming lens.…”

Section: Fourier-trandform Volume Holographic Spectrometermentioning

confidence: 99%

Compact and efficient spectrometers using holographic spectral diversity filters

et al. 2005

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We present a class of spectrometers that work based on diffractive properties of spherical beam volume holograms. The hologram in these spectrometers is recorded by a plane wave and a spherical beam and acts as a spectral diversity filter (SDF), which maps different input wavelengths into different locations in the output plane. The experimental results demonstrate that the spherical beam volume holograms have the capability of separation different wavelength channels of a collimated incident beam. For the analysis of the spherical beam volume hologram, a new theoretical method is introduced and used. It is shown that the experimental results are in good agreement with the theoretical study. Using these results, we demonstrate a Fourier-transform volume holographic spectrometer formed by a Fourier-transform lens, a spherical beam volume hologram, and a CCD. We show that this spectrometer can operate well under spatially incoherent light illumination without using any spatial filter (i.e., slit) in the input. We finally introduce a new implementation of a spectrometer for diffuse source spectroscopy by using only a volume hologram, recorded by two spherical beams, and a CCD. The proposed spectrometer is very compact, inexpensive, less sensitive to optical alignment, and has potentially high throughput that can be widely used in biological and environmental sensing applications.

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Role of recording geometry in the performance of spectral diversity filters with spherical beam volume holograms

Cited by 6 publications

References 5 publications

Spherical beam volume holograms for spectroscopic applications: modeling and implementation

Spherical beam volume holograms for spectroscopic applications: modeling and implementation

Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

Compact and efficient spectrometers using holographic spectral diversity filters

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