I. V. Kondratyev, I. V. Dyakonov, M. Yu. Saygin et al. · AIP conference proceedings · 2020
Linear optics is a promising physical architecture for the implementation of the quantum computing devices. The key element of the linear optical quantum computer is an optical circuit realizing the sequence of transformations defined by the required quantum algorithm. The most prominent approach is the reconfigurable integrated photonics which allows to miniaturize standard optical setups on the chosen integrated photonic platform. In this paper, we propose a universal linear-optical circuit design comprised of the series of multiport beamsplitters followed by the phaseshifting elements. The proposed unitary composer device can be straightforwardly implemented using standard integrated photonic technologies. We provide guidelines for appropriate multiport beamsplitter fabrication using integrated waveguide lattices. To exemplify the performance of the composer we provide the six-mode CNOT linear optical gate circuit design fitted to described interferometric circuit.
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Jan Philip Kolb (3954170), Wolfgang Draxinger (3953783), Julian Klee (6524150) et al. · Figshare · 2019
<p><b>DC: dispersion compensation.</b> BPD: balanced photodetector, recal: recalibration arm, reference: reference arm, PC: polarization controller, X-mirror: x-axis resonant scanner, Y-mirror: Y-axis galvanometer scanner, L1 and L2: lens group 1 and 2, DM: dichroic mirror, FT: fixation target (attenuated LED projector).</p>
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Kevin Chen · 2021
This report describes the design of Mach-Zehnder Interferometer, including its design background, components used, and physical parameters.
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Lei Shi, Kai Li, Zhifan Gao et al. · PubMed · 2013
A novel interferometer system based on the combinations of cube-corner reflectors and fixed plane mirrors was designed, the moving mirror drive system was designed and analysed, and its governor PID algorithm was used to ensure that the movement of the moving mirror is collimated, uniform and smooth. The parameters of the optical system of the interferometer and the optical devices were described. Finally, after validation of the experiment, it was indicated that the wave number accuracy, resolution, signal to noise ratio and other key indicators can meet the needs of practical application.
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Andrew Nisbet · DSpace@MIT (Massachusetts Institute of Technology) · 1992
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
Cited by 1Open access
Hagyong Kihm, Seung‐Woo Kim · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2003
We describe an oblique point-diffraction source, which is made from a single-mode optical fiber whose end is specially cut with an oblique face angle of 28.8° to the optical axis of the fiber. Analytical and empirical investigations reveal that, like ordinary fibers cut with zero face angle, the oblique fiber generates a high-quality spherical wave into free space by means of point diffraction at its end, but the diffracted wave has a propagation angle of 45° to the surface normal. This inclined nature of point diffraction is useful in many optical designs because it allows the returning wave of the original diffracted wave to be reflect at a right angle at the end face of the oblique fiber without additional optics. An exemplary use of the oblique fiber is demonstrated in an enhanced optical design of Fizeau interferometer, in which the troublesome combination of a pinhole and a beam splitter is effectively replaced only with a single oblique fiber. Another example is shown in a phase-shifting diffraction interferometer that has been specially designed for testing concave mirrors of low f-numbers. The use of oblique fibers enables to use the entire full numerical aperture of the diffracted wave from a single-mode fiber for optical testing without any overlap between the reference and the test waves.
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Anzhi He, Hailing Wang, Dapeng Yan et al. · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1991
The optical layout, the application, and the working principle of a large-aperture long-range moire interferometer (MI) for the quantitative measurement of flow properties are introduced. The interferometer is easily converted from a schlieren, and is easily tuned by practitioners of experimental flow mechanics.
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何煦 He Xu, Jun Ma · Optics and Precision Engineering · 2011
As conventional phase shifting interferometers can not test the wavefront aberration from a large diameter and long optical path system accuracely,a new commonpath shearing interferometer is designed to elimnate the system error introduced by the standard wavefront.The new design takes an agglutination prism consisting of a triangular prism and a rhombic prism as a shear device to produce interference by the wavefront under-test with its replication.A group of different relative aperture lens switching devices are used to control the shearing ratio of the shearing interferometer.Compared with the data from 4D dynamic interferometers under different temperature conditions,it shows that the repeatability of designed shearing interferometer is about λ/80 and the accuracy of root mean square is better than λ/80(λ=630 nm).The design of the commonpath shearing interferometer greatly reduces its dimension and weight and also improves the experiment efficiency for long optical path interference measurement.
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She, Wei (author) · Research Repository (Delft University of Technology) · 2022
Lithography machines that manufacture integrated circuits require non-contact and nanometer-scale position measurement, which is led by displacement laser interferometer in some ASML machines. The aim of the project is to design a displacement interferometer using non-polarizing light to meet the requirements and be cost-effective. The design is challenging considering the requirements of 350 mm measurement range, 300 µrad angular range and less than 1 nm periodical non-linearity (PNL) error.<br/><br/>This thesis analyzes all the design requirements first. To fulfill the requirements, efficient design strategies are clarified, and the phase detection method is determined. <br/><br/>Three interferometer designs are investigated and developed in this thesis. The design concepts are collected from ASML internal references. Mathematical models are built to represent the optics and trace the light in each interferometer. Optimization tools are developed to solve and tune the parameters that fulfill all the dimension-related requirements. Geometrical optics simulations are performed to verify the mathematical models and the optimization results. The source and behavior of PNL error in each interferometer are carefully researched. In a design with lenses, sequential mode simulations are performed to calculate the wavefront error. Further calculations based on the wavefront error indicate this interferometer design is not feasible.<br/><br/>Based on the theoretical analysis two interferometer designs can fulfill all the requirements. These two interferometers are built in the cleanroom with off-the-shelf parts to validate the working principle and PNL errors. The optics, optomechanics and electronics used in the tests are explained. The methods of alignment and measurement are introduced. The working principles of the two interferometers are validated, and the behaviors of PNL error match the theoretical analysis.
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Prasanna Mahavarkar · Journal of Instrumentation · 2023
Abstract Fabry-Perot Interferometer are particularly useful for high-resolution spectroscopy and other applications including astronomy and intra-cavity laser-line narrowing. Fabry-Perot etalon with diameters 1 mm square to 100 mm circular are commercially available and using a conglomerate of optomechanical components and lenses form a Fabry-Perot Interferometer (FPI) system. The etalon when illuminated with a known wavelength laser beam through fore-optics transmits the interference pattern onto a detector through back-optics and thus the image formed on the detector is a concentric circular interference fringe pattern. A sharp pattern with a maximum number of fringes is achieved by introducing a correct combination of the fore and back optomechanical system. Commercially available interferometer inclusive of the optics and the etalon are expensive and beyond the purchasing capacity of budget-conscious users. An alternative to these ready-made interferometer is to manufacture an indigenous optomechanical system and integrate it with the commercially available etalon that delivers a low cost, less weight, and a fairly simple FPI. This report discusses in detail one such system designed and developed in our institute laboratory. The important parameter finesse is calculated and its accuracy is found to be 85%. The developed system with further modifications, like the insertion of the field-of-view module, may serve as an alternative for the large size-based integrating sphere systems that are deployed in the field for observations.
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Wygnanski I · eScholarship@McGill (McGill) · 1963
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Raya Badie Younis, Suha Mousa Khorsheed, Ziad Tarik AlDahan · International Journal of Scientific Engineering and Research · 2018
This paper presents an experimental study of the laser interferometry technique. Zemax OpticStudiowas employed to model Michelson interferometer for eardrum evaluation. Zemax Optical Design simulation was performed to specify the proper dimensions of Michelson interferometer for achieving best performance.A default configuration of Michelson interferometer was modeled. in terms of variant scaled configurationto reduce the dimensions and improve the resolution. Therefore, simulated eardrum characteristics were evaluated in response to pure tone sound stimulations. The measurement results show that the proposed design was able to detect nanometer displacement of the tympanic membrane with a high sensitivity.
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Joseph H. Goad, K. C. Romanczyk, Charles D. Engle · Optical Society of America Annual Meeting · 1990
This paper outlines some of the "how-to" and "how-not-to" empirical experiences en countered in the design and construction of thermal/vacuum chambers for Fabry-Perot interferometer containment. The thermal environment is controlled to provide stable interferometric data for varying ambient temperatures. The interferometer operation in a vacuum ensures that the data will not vary with changes in the optical refractive index due to ambient pressure changes. Wedged windows are used to prevent secondary reflections from interfering with the data. Our paper reviews several examples of wedged-window attachments. Because a near-zero leak-proof design cannot be maintained with O-rings, small vacuum pumps are required to obtain continuous evacuation. We will also review our experiences relating to keeping chamber ambient temperature changes from affecting the interferometric data. We have used techniques providing a thermally stable interferometric system that produces stable data over an ambient-temperature range of 1540C with variations in ambient pressure.
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Wang, Gang, Gao, Dongfeng, Ni, Wei-Tou et al. · arXiv (Cornell University) · 2019
Atom Interferometric Gravitational-wave (GW) Space Observatory (AIGSO) is a mission concept mainly aimed at the middle-frequency (0.1 Hz - 10 Hz) GW detection. AIGSO proposes to have three spacecraft in linear formation with extension of 10 km. The three spacecraft need to maintain 5 km + 5 km constant arm-length formation. In this study, we address the issue of orbit design and thruster requirement. The acceleration to maintain the formation can be designed to be less than 30 pm/s$^2$ and the thruster requirement is in the 30 nN range. Application to other arm-length-maintaining missions is also discussed.
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Chenxi Gong, Yuhang Shen, Sen Han et al. · 2023
To address the problem that the traditional multi-wavelength wavefront detection requires manual adjustment of mechanical devices and low automation, this paper proposes a multi-wavelength laser interferometer control system with the Fizeau-type interferometer principle as the background, using Visual Studio to establish the upper computer control interface on the computer and sending signals to the microcontroller through the serial port to control the interferometer. Among them, the main controls are the switching of fluorescence alignment plate in 1064nm laser, the translation drive of collimating lens within 2mm of Z-axis, the automatic adjustment of variable diaphragm and the variable adjustment of CCD. The system realizes the automatic switching of five wavelengths of the multi-wavelength laser interferometer by controlling the precision motor, which reduces the error caused by manual adjustment and improves the measurement accuracy and efficiency of the interferometer.
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Dreier, H., Dinklage, A., Fischer, R. et al. · Max Planck Institute for Plasma Physics · 2007
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Ik-Hwan Choi · The Journal of Korean Institute of Electromagnetic Engineering and Science · 2016
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Daniel D. LaPorte · 1981
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Kerry Harwood · Publications of the Astronomical Society of Australia · 1972
Spectrometers give information on the chemical composition and physical properties of celestial objects. The Earth’s atmosphere restricts the observable spectra to windows in the absorption. Most of these windows are less than one octave wide. To increase the amount of information gained, it is necessary to increase the resolution of the spectrometers. With the advent of balloons, rockets and spacecraft, it is possible to make observations free from atmospheric absorption and it is possible to gain more information by increasing the bandwidth of spectrometers. This paper describes an infra-red Fourier transform spectrometer. The interferometer has a bandwidth of over one decade, from 500 to 5,000 cm -1 , with a maximum resolution of 10 cm -1 . The resolution can be electronically controlled. There are no absorbing or refracting parts in the interferometer and the resolution is limited by mechanical considerations.
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L. Vines, G. Wang · 2003
We have demonstrated a differential setup of two fiberoptic gyroscopes in series for measuring the difference in rotation between two parallel axes. The sensor is insensitive to global rotations affecting the two axis equally. The system can be used in structural monitoring of large sized objects such as ships and airplanes. The application at hand is a direct measurement of the torsion vibrations in ships. The idea is to put a Sagnac interferometer in each end of the ship with axis parallel to the alongside axis. This can be done using two independent gyroscopes, but the system developed here reduces the two independent gyroscopes to one interferometer.
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