Phase-conjugate Michelson interferometers for all-optical image processing and computing

Norman, Jeffrey B.

doi:10.1119/1.16949

Cited by 11 publications

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“…It demonstrates complete cancellation of the light waves to be concerned in the interferometer. 15 Two replicas reflected by two SPPCMs are same, and two wavefronts forming an interference signal are matched that are the same as an incident wavefront. The interference intensity is written as…”

Section: Dynamic Phase-conjugate Reflectivity With An External-cavity Ldmentioning

confidence: 99%

Phase-conjugate distance measurement interferometer with frequency modulation of a laser diode

Ishii

2002

SPIE Proceedings

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Laser-diode phase-conjugate interferometer with two self-pumped (cat) phase-conjugate mirrors instead of two ordinary mirrors is constructed for distance measurement over extended ranges. The measurement is based on frequency-modulated continuous-wave techniques. A wide-tunable laser diode (LD) with an external cavity is used to generate the chirping signal. The interferometer is immune to spatially nonuniform phase distortion, but can only detect the spatially uniform phase change introduced by the displacement of one cat mirror. The distance can be measured by detecting the beat frequency with an rf spectrum analyzer. The linear regression of the beat frequency as a function of the distance has been ascertained. The system has been characterized over a measurement range from 0.09 mm to 15.75 mm within 2.49 nm of 0.08 nm in wavelength diversities.

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Section: Dynamic Phase-conjugate Reflectivity With An External-cavity Ldmentioning

confidence: 99%

Phase-conjugate distance measurement interferometer with frequency modulation of a laser diode

Ishii

2002

SPIE Proceedings

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“…It is one of the most important classical experiments taught in both lecture and laboratory courses (Wolfson & Pasachoff 1999;Melissinos & Napolitano 2003;Serway & Jewett 2013;Bennett et al 2013). Many studies and applications have appeared in this journal (Fang et al 2013;Rudmin et al 1980;Matthys & Pedrotti 1982;da Costa, Kiedansky & Siri 1988;Diamond et al 1990;Mellen 1990;Norman 1992;Belansky, Richard & Wanser 1993;Kiess & Berg 1996;Nachman, Pellegrino & Bernstein 1997;Fox et al 1999), and recently the Michelson interferometer is being applied to the detection of gravitational waves (Kuroda et al 1999;Abbott et al 2009;Harry & LIGO Scientific Collaboration 2010). The Michelson stellar interferometer is an application of the same physical concept of interference, in this case, to a light source in the sky.…”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12] Many studies and applications of the Michelson Interferometer have appeared in this journal, [13][14][15][16][17][18][19][20][21][22][23] and it is even currently being applied to the detection of gravitational waves. [24][25][26] The Michelson stellar interferometer is an application of the same physical concept of interference, in this case to a light source in the sky.…”

Section: Introductionmentioning

confidence: 99%

A Michelson-type radio interferometer for university education

Koda

Barrett

Hasegawa

et al. 2016

American Journal of Physics

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We report development of a simple and affordable radio interferometer suitable as an educational laboratory experiment. The design of this interferometer is based on the Michelson and Pease stellar optical interferometer, but instead operates at the radio wavelength of $11 GHz ($2.7 cm), requiring much less stringent optical accuracy in its design and use. We utilize a commercial broadcast satellite dish and feedhorn with two flat side mirrors that slide on a ladder, providing baseline coverage. This interferometer can resolve and measure the diameter of the Sun, even on a day with marginal weather. Commercial broadcast satellites provide convenient point sources for comparison to the Sun's extended disk. The mathematical background of an adding interferometer is presented, as is its design and development, including the receiver system, and sample measurements of the Sun. Results from a student laboratory report are shown. With the increasing importance of interferometry in astronomy, the lack of educational interferometers is an obstacle to training the future generation of astronomers. This interferometer provides the hands-on experience needed to fully understand the basic concepts of interferometry.

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“…Optical Fourier techniques and spatial light modulators have been widely employed in image processing techniques intended for medical imaging. , However, the ultimate potential of photonic systems is revealed when all-optical logic computations come into play. − All-optical pattern recognition schemes have been realized with different types of optical correlators based on photorefractive polymers, semiconductor optical amplifiers, delay lines, and phase shifter designs . Photorefraction, phase conjugation, second-harmonic generation, vapor atomic transitions with four-wave mixing, spatial dispersers, and reservoir computing systems have served as the basis of reliable all-optical image processors. Nevertheless, the impact of these approaches is limited by complexity as well as fundamental speed restrictions and energy requirements due to the nonlinearities involved.…”

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confidence: 99%

All-Optical Pattern Recognition and Image Processing on a Metamaterial Beam Splitter

2017

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Recognition, comparison, and analysis of large patterns or images are computationally intensive tasks that can be more efficiently addressed by inherently parallel optical techniques than sequential electronic data processing. However, existing all-optical image processing and pattern recognition methods based on optical nonlinearities are limited by an unavoidable trade-off between speed and intensity requirements. Here we propose and experimentally demonstrate a technique for recognition and analysis of binary images that is based on the linear interaction of light with light on a lossy metamaterial beam splitter of substantially subwavelength thickness. Similarities and differences between arbitrarily complex binary images are mapped directly with a camera for real-time qualitative analysis. Regarding quantitative analysis, agreement, disagreement, and any other set operation between the patterns can be determined from power measurements acquired with a photodetector. In contrast to nonlinear techniques, which require high intensities to activate the nonlinear response, the image analysis method described here can be performed at low intensities and high speed limited only by the detector noise and response time.

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Phase-conjugate Michelson interferometers for all-optical image processing and computing

Cited by 11 publications

References 0 publications

Phase-conjugate distance measurement interferometer with frequency modulation of a laser diode

Phase-conjugate distance measurement interferometer with frequency modulation of a laser diode

A Michelson-type radio interferometer for university education

All-Optical Pattern Recognition and Image Processing on a Metamaterial Beam Splitter

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