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Mandel, Leonard, Emil Wolf, and Pierre Meystre. "Optical Coherence and Quantum Optics." American Journal of Physics 64, no. 11 (November 1996): 1438–39. http://dx.doi.org/10.1119/1.18450.
Hyde, Milo. "Controlling the Spatial Coherence of an Optical Source Using a Spatial Filter." Applied Sciences 8, no. 9 (August 26, 2018): 1465. http://dx.doi.org/10.3390/app8091465.
This paper presents the theory for controlling the spectral degree of coherence via spatial filtering. Starting with a quasi-homogeneous partially coherent source, the cross-spectral density function of the field at the output of the spatial filter is found by applying Fourier and statistical optics theory. The key relation obtained from this analysis is a closed-form expression for the filter function in terms of the desired output spectral degree of coherence. This theory is verified with Monte Carlo wave-optics simulations of spatial coherence control and beam shaping for potential use in free-space optical communications and directed energy applications. The simulated results are found to be in good agreement with the developed theory. The technique presented in this paper will be useful in applications where coherence control is advantageous, e.g., directed energy, free-space optical communications, remote sensing, medicine, and manufacturing.
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Singer, Andrej, and Ivan A. Vartanyants. "Coherence properties of focused X-ray beams at high-brilliance synchrotron sources." Journal of Synchrotron Radiation 21, no. 1 (November 2, 2013): 5–15. http://dx.doi.org/10.1107/s1600577513023850.
An analytical approach describing properties of focused partially coherent X-ray beams is presented. The method is based on the results of statistical optics and gives both the beam size and transverse coherence length at any distance behind an optical element. In particular, here Gaussian Schell-model beams and thin optical elements are considered. Limiting cases of incoherent and fully coherent illumination of the focusing element are discussed. The effect of the beam-defining aperture, typically used in combination with focusing elements at synchrotron sources to improve transverse coherence, is also analyzed in detail. As an example, the coherence properties in the focal region of compound refractive lenses at the PETRA III synchrotron source are analyzed.
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Law, Yuk. "The Optics of Optical Coherence Tomography." JACC: Cardiovascular Imaging 12, no. 12 (December 2019): 2502–4. http://dx.doi.org/10.1016/j.jcmg.2018.07.030.
Salditt, Tim, Markus Osterhoff, Martin Krenkel, Robin N. Wilke, Marius Priebe, Matthias Bartels, Sebastian Kalbfleisch, and Michael Sprung. "Compound focusing mirror and X-ray waveguide optics for coherent imaging and nano-diffraction." Journal of Synchrotron Radiation 22, no. 4 (June 23, 2015): 867–78. http://dx.doi.org/10.1107/s1600577515007742.
A compound optical system for coherent focusing and imaging at the nanoscale is reported, realised by high-gain fixed-curvature elliptical mirrors in combination with X-ray waveguide optics or different cleaning apertures. The key optical concepts are illustrated, as implemented at the Göttingen Instrument for Nano-Imaging with X-rays (GINIX), installed at the P10 coherence beamline of the PETRA III storage ring at DESY, Hamburg, and examples for typical applications in biological imaging are given. Characteristic beam configurations with the recently achieved values are also described, meeting the different requirements of the applications, such as spot size, coherence or bandwidth. The emphasis of this work is on the different beam shaping, filtering and characterization methods.
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Ding Chaoliang, 丁超亮, 亓协兴 Qi Xiexing, and 潘留占 Pan Liuzhan. "时空相干涡旋中的相干开关." Acta Optica Sinica 42, no. 20 (2022): 2026004. http://dx.doi.org/10.3788/aos202242.2026004.
Akcay, Avni Ceyhun. "System design and optimization of optical coherence tomography." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3586.
Optical coherence imaging, including tomography (OCT) and microscopy (OCM), has been a growing research field in biomedical optical imaging in the last decade. In this imaging modality, a broadband light source, thus of short temporal coherence length, is used to perform imaging via interferometry. A challenge in optical coherence imaging, as in any imaging system towards biomedical diagnosis, is the quantification of image quality and optimization of the system components, both a primary focus of this research. We concentrated our efforts on the optimization of the imaging system from two main standpoints: axial point spread function (PSF) and practical steps towards compact low-cost solutions. Up to recently, the criteria for the quality of a system was based on speed of imaging, sensitivity, and particularly axial resolution estimated solely from the full-width at half-maximum (FWHM) of the axial PSF with the common practice of assuming a Gaussian source power spectrum. As part of our work to quantify axial resolution we first brought forth two more metrics unlike FWHM, which accounted for side lobes in the axial PSF caused by irregularities in the shape of the source power spectrum, such as spectral dips. Subsequently, we presented a method where the axial PSF was significantly optimized by suppressing the side lobes occurring because of the irregular shape of the source power spectrum. The optimization was performed through optically shaping the source power spectrum via a programmable spectral shaper, which consequentially led to suppression of spurious structures in the images of a layered specimen. The superiority of the demonstrated approach was in performing reshaping before imaging, thus eliminating the need for post-data acquisition digital signal processing. Importantly, towards the optimization and objective image quality assessment in optical coherence imaging, the impact of source spectral shaping was further analyzed in a task-based assessment method based on statistical decision theory. Two classification tasks, a signal-detection task and a resolution task, were investigated. Results showed that reshaping the source power spectrum was a benefit essentially to the resolution task, as opposed to both the detection and resolution tasks, and the importance of the specimen local variations in index of refraction on the resolution task was demonstrated. Finally, towards the optimization of OCT and OCM for use in clinical settings, we analyzed the detection electronics stage, which is a crucial component of the system that is designed to capture extremely weak interferometric signals in biomedical and biological imaging applications. We designed and tested detection electronics to achieve a compact and low-cost solution for portable imaging units and demonstrated that the design provided an equivalent performance to the commercial lock-in amplifier considering the system sensitivity obtained with both detection schemes. Ph.D. Optics and Photonics Optics
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Apostol, Adela. "COHERENCE PROPERTIES OF OPTICAL NEAR-FIELDS." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2715.
Next generation photonics-based technologies will ultimately rely on novel materials and devices. For this purpose, phenomena at subwavelength scales are being studied to advance both fundamental knowledge and experimental capabilities. In this dissertation, concepts specific to near-field optics and experimental capabilities specific to near-field microscopy are used to investigate various aspects of the statistical properties of random electromagnetic fields in the vicinity of optically inhomogeneous media which emit or scatter radiation. The properties of such fields are being characterized within the frame of the coherence theory. While successful in describing the far-field properties of optical fields, the fundamental results of the conventional coherence theory disregard the contribution of short-range evanescent waves. Nonetheless, the specific features of random fields at subwavelength distances from interfaces of real media are influenced by the presence of evanescent waves because, in this case, both propagating and nonpropagating components contribute to the detectable properties of the radiation. In our studies, we have fully accounted for both contributions and, as a result, different surface and subsurface characteristics of inhomogeneous media could be explored. We investigated different properties of random optical near-fields which exhibit either Gaussian or non-Gaussian statistics. We have demonstrated that characteristics of optical radiation such as first- and second-order statistics of intensity and the spectral density in the vicinity of random media are all determined by both evanescent waves contribution and the statistical properties of the physical interface. For instance, we quantified the subtle differences which exist between the near- and far-field spectra of radiation and we brought the first experimental evidence that, contrary to the predictions of the conventional coherence theory, the values of coherence length in the near field depend on the distance from the interface and, moreover, they can be smaller than the wavelength of light. The results included in this dissertation demonstrate that the statistical properties of the electromagnetic fields which exist in the close proximity of inhomogeneous media can be used to extract structural information. They also suggest the possibility to adjust the coherence properties of the emitted radiation by modifying the statistical properties of the interfaces. Understanding the random interference phenomena in the near-field could also lead to new possibilities for surface and subsurface diagnostics of inhomogeneous media. In addition, controlling the statistical properties of radiation at subwavelength scales should be of paramount importance in the design of miniaturized optical sources, detectors and sensors. Ph.D. Other Optics and Photonics Optics
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Zuluaga, Andrés Felipe. "Contrast agents for tumor detection with optical coherence tomography /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Thesis (Ph.D.) - University of Glasgow, 2003. Ph.D. thesis submitted to the Department of Cardiovascular and Medical Sciences, Faculty of Medicine, University of Glasgow, 2003. Includes bibliographical references. Print version also available.
Eberly, Joseph H., Leonard Mandel, and Emil Wolf, eds. Coherence and Quantum Optics VII. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8.
Eberly, Joseph H., Leonard Mandel, and Emil Wolf, eds. Coherence and Quantum Optics VI. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0847-8.
Bigelow, N. P., J. H. Eberly, C. R. Stroud, and I. A. Walmsley, eds. Coherence and Quantum Optics VIII. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8907-9.
ICONO '95 (1995 Saint Petersburg, Russia). Coherent phenomena and amplification without inversion. Edited by Andreev A. V, Kocharovskaya Olga, Mandel P. 1942-, Scientific Council for Coherent and Nonlinear Optics (Rossiĭskai͡a︡ akademii͡a︡ nauk), and Society of Photo-optical Instrumentation Engineers. Bellingham, Wash: SPIE-the International Society for Optical Engineering, 1996.
Lauterborn, Werner, and Thomas Kurz. "Coherence." In Coherent Optics, 35–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05273-0_4.
Lauterborn, Werner, Thomas Kurz, and Martin Wiesenfeldt. "Coherence." In Coherent Optics, 31–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-662-03144-5_4.
Meystre, Pierre. "Matter-Wave Coherence." In Atom Optics, 149–64. New York, NY: Springer New York, 2001. http://dx.doi.org/10.1007/978-1-4757-3526-0_9.
Françon, M., N. Krauzman, J. P. Mathieu, and M. May. "Temporal Coherence and Spatial Coherence." In Experiments in Physical Optics, 39–45. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003062349-5.
Orszag, Miguel. "Quantum Theory of Coherence." In Quantum Optics, 61–83. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29037-9_6.
Orszag, Miguel. "Quantum Theory of Coherence." In Quantum Optics, 51–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04114-7_6.
Fernández, Enrique Josua, and Pablo Artal. "Adaptive Optics in Ocular Optical Coherence Tomography." In Optical Coherence Tomography, 209–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27410-7_10.
Wiseman, H. M., and John A. Vaccaro. "Atom lasers, coherent states, and coherence." In Coherence and Quantum Optics VIII, 581–82. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8907-9_178.
Conference papers on the topic "Coherence (Optics)":
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Gbur, Greg, and Taco D. Visser. "Coherence vortices in partially coherent beams." In Frontiers in Optics. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/fio.2003.thb5.
Zhang, Jun, Bin Rao, and Zhongping Chen. "Coherent amplified optical coherence tomography." In European Conference on Biomedical Optics. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/ecbo.2007.6627_36.
Zhang, Jun, Bin Rao, and Zhongping Chen. "Coherent amplified optical coherence tomography." In European Conference on Biomedical Optics, edited by Peter E. Andersen and Zhongping Chen. SPIE, 2007. http://dx.doi.org/10.1117/12.728654.
Since Marc Levenson’s introduction of phase masks to photolithography [1], there have been numerous improvements in their design and fabrication [2-6]. One issue not yet considered is the effect of illumination source spatial coherence on the effectiveness of phase masks in improving resolution and focal depth. As the illumination wavelength has grown shorter (to accommodate the classical resolution limit Δ x ≅ λ f D ≅ λ N A , sources have become more spatially coherent [7], and with the use of excimer laser illumination we approach complete spatial coherence. It has generally been assumed that increased spatial coherence improves the performance of phase masks, since it enhances the destructive interference between adjacent (opposite phase) features. Although this is true for periodic patterns, we show here that more complex images suffer a trade-off between the contrast enhancement of coherent alternating features and the larger effective aperture of incoherent imaging. This effect is particularly pronounced in complex 2-D images where phase conflict is a problem.
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Salik, Boaz, and Amnon Yariv. "Effect of spatial coherence on photolithographic phase mask performance." In Diffractive Optics and Micro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/domo.1996.jtub.28.
We show that, contrary to the prevailing trend in photolithography, increasing the spatial coherence of illumination does not necessarily improve the performance of phase masks in enhancing resolution and focal depth. Simulations and experiments show that for large (aperiodic) phase masks, the optimal coherence diameter is determined by the minimum resolvable feature size, not the size of the mask. This is due to a trade-off between the destructive interference of adjacent features under coherent illumination and the larger effective aperture of incoherent illumination.
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Wang, Wei, and Mitsuo Takeda. "Coherence current: contrast flow in coherence function." In SPIE Optics + Photonics, edited by Katherine Creath. SPIE, 2006. http://dx.doi.org/10.1117/12.682333.
Shi, Guohua, Zhihua Ding, Yun Dai, Xunjun Rao, and Yudong Zhang. "Adaptive optics optical coherence tomography." In SPIE Proceedings, edited by Qingming Luo, Lihong V. Wang, Valery V. Tuchin, and Min Gu. SPIE, 2007. http://dx.doi.org/10.1117/12.741101.
Qian, X. F., S. Kizhakkumpurath Manikandan, A. Al Qasimi, A. N. Vamivakas, and J. H. Eberly. "New Coherence Theorem." In Frontiers in Optics. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/fio.2017.jw4a.24.
Eberly, J. H. Seventh Rochester Conference on Coherence and Quantum Optics. Fort Belvoir, VA: Defense Technical Information Center, November 1996. http://dx.doi.org/10.21236/ada319112.
Eberly, J. H., L. Mandel, and E. Wolf. The Sixth Rochester Conference on Coherence and Quantum Optics. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada233350.
Scully, Marlan O. Detection of Biochemical Pathogens, Laser Stand-off Spectroscopy, Quantum Coherence, and Many Body Quantum Optics. Fort Belvoir, VA: Defense Technical Information Center, February 2012. http://dx.doi.org/10.21236/ada558091.
Steel, Duncan G. Nano-Optics: Coherent Nonlinear Optical Response and Control of Single Quantum Dots. Fort Belvoir, VA: Defense Technical Information Center, April 2002. http://dx.doi.org/10.21236/ada402598.
Thomas, John E. Continuous Sources of Optical Coherence for Optical Processing. Fort Belvoir, VA: Defense Technical Information Center, October 1996. http://dx.doi.org/10.21236/ada315721.
Fujimoto, James G. Optical Coherence Tomographic Imaging and Delivery for Surgical Guidance. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada428494.
Wolf, Emil. Coherence Effects in Optical Physics with Special Reference to Spectroscopy. Fort Belvoir, VA: Defense Technical Information Center, January 1988. http://dx.doi.org/10.21236/ada189520.
Fujimoto, James G. Advanced Technologies for Ultrahigh Resolution and Functional Optical Coherence Tomography. Fort Belvoir, VA: Defense Technical Information Center, April 2008. http://dx.doi.org/10.21236/ada482111.
Dupuis, Russell D., Zachary Lochner, Tsung-Ting Kao, Yuh-Shiuan Liu, Xiao-Hang Li, M. M. Satter, Shyh-Chiang Shen, P. D. Yoder, Jae-Hyun Rou, and Theeradetch Detchprohm. Advanced Middle-UV Coherent Optical Sources. Fort Belvoir, VA: Defense Technical Information Center, November 2013. http://dx.doi.org/10.21236/ada593936.
Suter, Melissa J. Electromagnetic-Optical Coherence Tomography Guidance of Transbronchial Solitary Pulmonary Nodule Biopsy. Fort Belvoir, VA: Defense Technical Information Center, July 2014. http://dx.doi.org/10.21236/ada614445.
