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Laser interferometer

S. Minkowitz, W. Smith-Vaniz · IEEE Journal of Quantum Electronics · 1967

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Laser interferometer

Joo, K.N. (author), Ellis, J.D. (author), Spronck, J.W. (author) · Research Repository (Delft University of Technology) · 2010

Laser interferometer comprising a laser light source providing at least one light beam at two distinct frequencies, a beam splitter for splitting the at least one light beam into reference and measurement beams, a first reflector and a second reflector for reflection of the reference and measurement beams, and at least one detector for detection of the interference signal pertaining to the reflected reference and measurement beams. The laser light source provides first and second light beams that are spatially separated and the first light beam has a first of said two distinct frequencies and the second light beam has a second of said distinct frequencies. Further the beam splitter splits the first and second light beams into first and second spatially separated reference beams travelling to the first reflector, and into first and second spatially separated measurement beams travelling to the second reflector. One of the first and second reflectors is arranged to cause that the reflected first measurement beam shares at least part of a travelling path with the second reflected reference beam and that the reflected second measurement beam shares at least part of a travelling path with the first reflected reference beam.

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Laser Interferometer

2006

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Laser-Interferometer

Zeitschrift für wirtschaftlichen Fabrikbetrieb · 2000

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Laser Interferometer calibrations

Han Haitjema, P.H.J. Schellekens · 1992

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Dynamic laser interferometer

Chovaneček, Libor · Brno University of Technology Digital Library (Brno University of Technology) · 2009

The theme of this bachelor´s project is dynamic laser interferometer. The project is firstly focused on theory, where it explains the term of interference and principle of operation of interferometer on specific types of interferometers. Different types of lasers used in interferometers are mentioned there. The next part of this paper is focused on assemblage of interferometer with description of particular parts. There are mentioned two methods of signal processing. The last part deals with confirmation of proper functioning of measuring system.

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ZEEMAN LASER INTERFEROMETER

J. A. Dahlquist, D. G. Peterson, W. Culshaw · Applied Physics Letters · 1966

A laser interferometer which utilizes some Zeeman laser properties has been built and operated. The application of an axial magnetic field constrains a two-mode 633-nm He–Ne laser to oscillate simultaneously as left- and right-hand circularly polarized modes at the upper and lower cavity resonances, respectively. The two modes, separated by a quarter-wave plate and polarizers, are sent through different arms of an interferometer, and are recombined and detected with a photomultiplier. Target motions in one arm, ranging from displacements of 10−6 cm at 12 kHz to 10 cm at 0.5 Hz, produced easily resolvable signals in this heterodyne device.

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Laser Differential Interferometer

V. D. Prilepskich, V. A. Khanov · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990

A design of a laser interferometer eliminating a zero drift type error is presented. The differential interferometer was used in making the angular displacement transducer and the probing complex for measuring sea-water refractive index variations.

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Laser Beam Interferometer

J. T. Glass, S. Majerowicz, R. E. Green et al. · 1983

•Deformation Mechanisms Leading to 12/27/79- 12/27/R? SFailure of Naval Alloys (Volume 11). " $PERFORMING ORG. REORTNuods

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Zeeman laser-based active laser interferometer

Ci‐Ling Pan · Annual Meeting Optical Society of America · 1988

Wavelength tunable laser diodes have recently been used for interferometric fringe stabilization and displacement measurement in the so-called active laser interferometers. 1 The basic idea is to compensate for any changes in the interference signal by tuning the frequency of the laser. A frequency- and amplitude-stabilized Zeeman He–Ne laser 2 is used instead in this work. Utilizing the extreme narrow linewidth (<1 MHz) of the laser, we have demonstrated that subnanometer resolution in the measurement of the displacement of a piezoelectric transducer is possible. While the single-mode tuning range of the laser is only ~300 MHz, displacement measurements over many wavelengths can be realized by adjusting the optical path length difference of the two arms of the Michelson interferometer. Interferometric fringe stabilization has also been realized with a stabilization factor of more than 2 orders of magnitude.

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Laser Doppler Interferometer: Analysis

M. Kamegai · Applied Optics · 1974

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Minao Kamegai, "Laser Doppler Interferometer: Analysis," Appl. Opt. 13, 1997-1998 (1974) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

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The Harwell laser interferometer

Moss, B.C., UKAEA, Harwell. Atomic Energy Research Establishment (United Kingdom) · OpenGrey (Institut de l'Information Scientifique et Technique) · 1982

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Length-measuring laser interferometer /

Corey, H. S., Sladky, Richard E., Schede, R. W. et al. · The Journal of the Abraham Lincoln Association

"Union Carbide Corporation Nuclear Division operating the Oak Ridge Gaseous Diffusion Plant, Oak Ridge Y-12 Plant, Oak Ridge National Laboratory, and Paducah Gaseous Diffusion Plant for the Atomic Energy Commission under U.S. government contract W-7405-eng-26."

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Laser Interferometer Space Antenna

Gravitational Waves · 2000

Front cover figure: Artist’s concept of the LISA configuration, bathing in the gravitational waves emitted from a distant cosmic event. Three spacecraft, each with a Y-shaped payload, form an equilateral triangle with sides of 5 million km in length. The two branches of the Y at one corner, together with one branch each from the spacecraft at the other two corners, form one of up to three Michelson-type interferometers, operated with infrared laser beams. The interferometers are designed to measure relative path changes δ`/ ` due to gravitational waves, so-called strains in space, down to 10−23, for observation times of the order of 1 year. The diameters of the spacecraft are about 2.5 m, the distances between them 5×109 m. Rear cover figure: Schematic diagram of LISA configuration, with three spacecraft in an equilateral triangle. The plane of this triangle is tilted by 60 ◦ out of the ecliptic. The center of this triangle moves around the Sun in an Earth-like orbit, about 20 ◦ behind the Earth, with the plane of the LISA formation revolving once per year on a cone of 30 ◦ half-angle. The drawing is not to scale, the triangular formation of the LISA interferometer, with sides of 5 million km, is blown up by a factor of 5.

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Laser Interferometer Space Antenna

Pau Amaro‐Seoane, H. Audley, S. Babak et al. · arXiv (Cornell University) · 2017

Following the selection of The Gravitational Universe by ESA, and the successful flight of LISA Pathfinder, the LISA Consortium now proposes a 4 year mission in response to ESA's call for missions for L3. The observatory will be based on three arms with six active laser links, between three identical spacecraft in a triangular formation separated by 2.5 million km. LISA is an all-sky monitor and will offer a wide view of a dynamic cosmos using Gravitational Waves as new and unique messengers to unveil The Gravitational Universe. It provides the closest ever view of the infant Universe at TeV energy scales, has known sources in the form of verification binaries in the Milky Way, and can probe the entire Universe, from its smallest scales near the horizons of black holes, all the way to cosmological scales. The LISA mission will scan the entire sky as it follows behind the Earth in its orbit, obtaining both polarisations of the Gravitational Waves simultaneously, and will measure source parameters with astrophysically relevant sensitivity in a band from below $10^{-4}\,$Hz to above $10^{-1}\,$Hz.

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LASER INTERFEROMETER SCALING COUNTER.

L.D. Wonnell · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1972

and, for each quarter- cycle input from the photodetector, transmits a pulse to the appropriate channel (to indicate leading or lagging) of the bidirectional counter. The bidirectional counter displays continuously the algebraic difference between the number of pulses received on one channel and the number received on the other. Since each pulse corresponds to a displacement of about 1.6 microinches, the readout system indicates the number of 1.6-microinch increments by which the measuring probe of the interferometer was displaced from an arbitrary reference position. (auth)

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Double integrated laser interferometer

Zbigniew Motyka · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2003

The layout of integrated optical system compromising the basis of proposed solution of double laser interferometer composed of two integrated Michelson's interferometers is presented and shortly discussed. Such an integrated system is designed for work with two lasers of different wavelength. It may serve for mapping surfaces and deformations of objects under investigation with the use of simultaneous recording of two mutually orthogonal gratings, each one composed of equidistant, parallel interference fringes projected onto the surface of such an object. The picture resulting two-coloured is recorded with the digital camera and may be used for obtaining these maps and deformations directly or in the indirect way after suitable digital processing applied to each colour component separately.

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Laser grating interferometer Patent

Jennie Barber, James C Emery, JAMES R. STERRETT · NASA Technical Reports Server (NASA) · 1969

Design and development of optical interferometer with laser light source for application to schlieren systems

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A Simple Laser Interferometer

Charles R. Munnerlyn · Applied Optics · 1969

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text C. R. Munnerlyn, "A Simple Laser Interferometer," Appl. Opt. 8, 827-829 (1969) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

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Laser Interferometer Space Antenna

Pau Amaro‐Seoane, H. Audley, S. Babak et al. · CERN Document Server (European Organization for Nuclear Research) · 2017

Following the selection of The Gravitational Universe by ESA, and the successful flight of LISA Pathfinder, the LISA Consortium now proposes a 4 year mission in response to ESA's call for missions for L3. The observatory will be based on three arms with six active laser links, between three identical spacecraft in a triangular formation separated by 2.5 million km. LISA is an all-sky monitor and will offer a wide view of a dynamic cosmos using Gravitational Waves as new and unique messengers to unveil The Gravitational Universe. It provides the closest ever view of the infant Universe at TeV energy scales, has known sources in the form of verification binaries in the Milky Way, and can probe the entire Universe, from its smallest scales near the horizons of black holes, all the way to cosmological scales. The LISA mission will scan the entire sky as it follows behind the Earth in its orbit, obtaining both polarisations of the Gravitational Waves simultaneously, and will measure source parameters with astrophysically relevant sensitivity in a band from below $10^{-4}\,$Hz to above $10^{-1}\,$Hz.

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