Qualitative demonstration of spectral diversity filtering using spherical beam volume holograms

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

doi:10.1364/opex.12.003018

Cited by 10 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently we demonstrated spectral diversity filters using spherical beam volume holograms (SBVHs) recorded by the interference of a plane wave and a spherical beam that originated from a point source. 2 When a SBVH is read by a plane wave from the direction of the recording spherical beam, the diffracted beam has a crescent shape because of partial Bragg matching. 2,3 The position of the crescent at the back face of the volume hologram depends on the reading wavelength and on the direction of the reading plane wave.…”

mentioning

confidence: 99%

Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

et al. 2005

Self Cite

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 99%

Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

et al. 2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…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%

“…When the SBVH (which is recorded by using Figure 1( ) is read by a monochromatic plane wave from the direction of the recording spherical beam without the presence of the rotating diffuser, the diffracted beam has a crescent shape because of partial Bragg matching [2,4]. As a result, a dark crescent at the back face of the hologram is observed on the CCD1 as shown in Figure 2(a), where the reading wavelength is nm 700…”

Section: Holographic Spectral Diversity Filtersmentioning

confidence: 99%

See 1 more Smart Citation

Compact and efficient spectrometers using holographic spectral diversity filters

et al. 2005

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…As a more reliable alternative, we recently proposed volume holographic SDFs. 2 In this Letter we explain the spectral properties of SDFs made by a simple spherical beam volume hologram (SBVH) and discuss the effect of recording geometry on the performance.…”

mentioning

confidence: 99%

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

et al. 2005

Self Cite

View full text Add to dashboard Cite

We present experimental demonstrations of spectral diversity filters with spherical beam volume holograms for multimodal multiplex spectroscopy. Major properties of filters under diffuse-light illumination are discussed. The comparisons of spectral diversity between the transmission geometry holograms and the reflection geometry holograms are also studied. The results show that there is a trade-off between the degree of the spatial coherence of the source and the spectral diversity of the filter. We also conclude that the reflection geometry holograms have better spectral diversity and less sensitivity to the spatial coherence of the source.

show abstract

Qualitative demonstration of spectral diversity filtering using spherical beam volume holograms

Cited by 10 publications

References 8 publications

Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

Compact Fourier-transform volume holographic spectrometer for diffuse source spectroscopy

Compact and efficient spectrometers using holographic spectral diversity filters

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

Contact Info

Product

Resources

About