The inherent parallelism in optics allows very powerful information processing. An electronically... more The inherent parallelism in optics allows very powerful information processing. An electronically addressed spatial light modulator is a device which can perform the function of converting information from the electronic domain to the optical domain. A review of optical system requirements and potential spatial light modulator technologies identified the combination of Ferroelectric Liquid Crystal and Very-Large-Scale-Integration circuitry as a very powerful generic technology. The circuitry allows high levels of addressing functionality and low power requirements in the modulation permit high density arrays. The investigation of the interaction of the two parent technologies to form useful modulator devices is the basis of this study. Ferroelectric liquid crystals were identified as allowing fast switching and good light modulating characteristics. Optimisation of device structures for high optical performance was investigated, particularly cell construction, liquid crystal alignme...
We consider the use of a ferroelectric liquid-crystal spatial light modulator (FLC SLM) to contro... more We consider the use of a ferroelectric liquid-crystal spatial light modulator (FLC SLM) to control the transmittance of a telescope pupil to compensate for the effects of scintillation. Our aim here is to prove the necessary and physically interesting result that it is possible to control the intensity of light by use of FLC SLM without inducing further phase aberrations. Furthermore, we show that system errors have only a small effect on the phase of the transmitted beam.
Electronics & Communication Engineering Journal, 2001
Page 1. Optically interconnected electronic chips: a tutorial and review of the technology by M. ... more Page 1. Optically interconnected electronic chips: a tutorial and review of the technology by M. Forbes, J. Gourlay and M. Desmulliez Optoelectronic interconnects between VLSI chips have been identified by the Semiconductor ...
The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direc... more The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direct writing of the guides and other structures is realized using a high-power 325 nm He:Cd laser. The loss is measured by cut-back to be less than 0.17 dB/cm at 850 nm and less than 0.5 dB/cm at 1310 nm. This material and writing system is used to
Spatial light modulators (SLMs) are arguably the critical elements in coherent optical processing... more Spatial light modulators (SLMs) are arguably the critical elements in coherent optical processing systems. Planarization techniques have been identified as crucial to increasing the performance of ferroelectric liquid crystal over very large scale integration SLMs when used in such systems. Planarization techniques allow enlarged and phase-flat pixel mirrors and improved liquid crystal alignment. This type of SLM is electrically addressed, i.e. transfers electrically represented information into an optical representation via binary phase modulation of the liquid crystal layer by the enlarged pixel modulation mirrors. The backplane design available for use in the study was a 176 × 176 pixel array dynamic random access memory. Investigations show an improvement in the device performance due to the planarization. This improvement was particularly evident when the SLMs were studied operating in a coherent optical system, where the diffraction efficiency was increased. The results compare favourably with transmissive SLMs, although further improvement in the liquid crystal quality is required.
A ferroelectric liquid-crystal spatial light modulator with an active silicon backplane is used t... more A ferroelectric liquid-crystal spatial light modulator with an active silicon backplane is used to implement reconfigurable reflective phase holograms. Optical results are presented for an optimized computergenerated Fourier hologram.
The inherent parallelism in optics allows very powerful information processing. An electronically... more The inherent parallelism in optics allows very powerful information processing. An electronically addressed spatial light modulator is a device which can perform the function of converting information from the electronic domain to the optical domain. A review of optical system requirements and potential spatial light modulator technologies identified the combination of Ferroelectric Liquid Crystal and Very-Large-Scale-Integration circuitry as a very powerful generic technology. The circuitry allows high levels of addressing functionality and low power requirements in the modulation permit high density arrays. The investigation of the interaction of the two parent technologies to form useful modulator devices is the basis of this study. Ferroelectric liquid crystals were identified as allowing fast switching and good light modulating characteristics. Optimisation of device structures for high optical performance was investigated, particularly cell construction, liquid crystal alignme...
We consider the use of a ferroelectric liquid-crystal spatial light modulator (FLC SLM) to contro... more We consider the use of a ferroelectric liquid-crystal spatial light modulator (FLC SLM) to control the transmittance of a telescope pupil to compensate for the effects of scintillation. Our aim here is to prove the necessary and physically interesting result that it is possible to control the intensity of light by use of FLC SLM without inducing further phase aberrations. Furthermore, we show that system errors have only a small effect on the phase of the transmitted beam.
Electronics & Communication Engineering Journal, 2001
Page 1. Optically interconnected electronic chips: a tutorial and review of the technology by M. ... more Page 1. Optically interconnected electronic chips: a tutorial and review of the technology by M. Forbes, J. Gourlay and M. Desmulliez Optoelectronic interconnects between VLSI chips have been identified by the Semiconductor ...
The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direc... more The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direct writing of the guides and other structures is realized using a high-power 325 nm He:Cd laser. The loss is measured by cut-back to be less than 0.17 dB/cm at 850 nm and less than 0.5 dB/cm at 1310 nm. This material and writing system is used to
Spatial light modulators (SLMs) are arguably the critical elements in coherent optical processing... more Spatial light modulators (SLMs) are arguably the critical elements in coherent optical processing systems. Planarization techniques have been identified as crucial to increasing the performance of ferroelectric liquid crystal over very large scale integration SLMs when used in such systems. Planarization techniques allow enlarged and phase-flat pixel mirrors and improved liquid crystal alignment. This type of SLM is electrically addressed, i.e. transfers electrically represented information into an optical representation via binary phase modulation of the liquid crystal layer by the enlarged pixel modulation mirrors. The backplane design available for use in the study was a 176 × 176 pixel array dynamic random access memory. Investigations show an improvement in the device performance due to the planarization. This improvement was particularly evident when the SLMs were studied operating in a coherent optical system, where the diffraction efficiency was increased. The results compare favourably with transmissive SLMs, although further improvement in the liquid crystal quality is required.
A ferroelectric liquid-crystal spatial light modulator with an active silicon backplane is used t... more A ferroelectric liquid-crystal spatial light modulator with an active silicon backplane is used to implement reconfigurable reflective phase holograms. Optical results are presented for an optimized computergenerated Fourier hologram.
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