Two-wave laser displacement meter

Abstract A two-wave laser displacement meter based on Michelson interferometer has been developed for measurements at an unknown temperature profile at the measurement trace. The requirements for meteorological parameters support during displacement measurements using the offered laser interferometer are less strict compared to using an one-wave interferometer. The article describes the optical schematic of the device. The results for the measurements of the developed laser interferometer for realization of the displacement unit within the limits of 60 m are presented. The weather condition influence on measurements was estimated. The application of pseudorandom displacement of the interferometer’s reference arm with accumulation made possible the reflector position resolution down to 0.01 μm the stoped-displacement mode, and down to 0.05 μm at the displacement mode. It was shown that such resolution allows to measure displacements at trace up to 60 m with inaccuracies less than 10 μm at the temperature profile amplitude up to 1 °C.

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Small-Sized Interferometer with Fabry–Perot Resonators for Gravitational Wave Detection

Sensors ◽

10.3390/s21051877 ◽

2021 ◽

Vol 21 (5) ◽

pp. 1877

Author(s):

Nikolai Petrov ◽

Vladislav Pustovoit

Keyword(s):

Correlation Function ◽

Gravitational Waves ◽

Laser Interferometer ◽

Zero Order ◽

Wave Detection ◽

Resonant Modes ◽

Fabry Perot ◽

Spatially Distributed ◽

Wave Laser ◽

Higher Sensitivity

It is highly desirable to have a compact laser interferometer for detecting gravitational waves. Here, a small-sized tabletop laser interferometer with Fabry–Perot resonators consisting of two spatially distributed “mirrors” for detecting gravitational waves is proposed. It is shown that the spectral resolution of 10−23 cm−1 can be achieved at a distance between mirrors of only 1–3 m. The influence of light absorption in crystals on the limiting resolution of such resonators is also studied. A higher sensitivity of the interferometer to shorter-wave laser radiation is shown. A method for detecting gravitational waves is proposed based on the measurement of the correlation function of the radiation intensities of non-zero-order resonant modes from the two arms of the Mach–Zehnder interferometer.

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The matter-wave laser interferometer gravitation antenna (MIGA): New perspectives for fundamental physics and geosciences

E3S Web of Conferences ◽

10.1051/e3sconf/20140401004 ◽

2014 ◽

Vol 4 ◽

pp. 01004 ◽

Cited By ~ 9

Author(s):

B. Canuel ◽

L. Amand ◽

A. Bertoldi ◽

W. Chaibi ◽

R. Geiger ◽

...

Keyword(s):

Laser Interferometer ◽

Matter Wave ◽

Fundamental Physics ◽

Wave Laser

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Laser interferometer calibration system for extensometers

Bulletin of the Seismological Society of America ◽

10.1785/bssa0580051379 ◽

1968 ◽

Vol 58 (5) ◽

pp. 1379-1383

Author(s):

G. Hade ◽

M. Conner ◽

J. T. Kuo

Keyword(s):

Laser Interferometer ◽

Michelson Interferometer ◽

Low Frequency ◽

Calibration Method ◽

Linear Range ◽

Laser Source ◽

Calibration System ◽

Frequency Oscillator ◽

Transducer Output ◽

Optical Calibration

Abstract A laser interferometer technique has been developed for calibrating extensometers at the Ogdensberg Station of Lamont Geological Observatory. It provides remotecontrolled calibration of both horizontal and vertical extensometers within the linear range of the transducer output. The present calibration system consists of an electromagnetic driving unit and a Michelson interferometer. The transducer end of the extensometer is displaced longitudinally with an electromagnetic driving unit, which is excited by a variable low-frequency oscillator with a bandwidth of 0.0005 to 60 kHz. The resultant displacement is detected by counting fringe displacements of the interferometer with an Ne-He laser source. With this calibration system, motion as small as 0.03 micron can be determined with excellent repeatability and with errors of less than 5 per cent, in comparison with errors of more than 40 per cent for the optical calibration method previously used.

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Vacuum system design for the 300 m gravitational wave laser interferometer in Japan (TAMA300)

Vacuum ◽

10.1016/0042-207x(96)00030-9 ◽

1996 ◽

Vol 47 (6-8) ◽

pp. 609-611 ◽

Cited By ~ 10

Author(s):

Y Saito ◽

N Matuda ◽

Y Ogawa ◽

G Horikoshi

Keyword(s):

Gravitational Wave ◽

System Design ◽

Laser Interferometer ◽

Vacuum System ◽

Wave Laser

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Continuous wave laser wavelength measurement using the travelling Michelson interferometer

Optics & Laser Technology ◽

10.1016/0030-3992(84)90094-x ◽

1984 ◽

Vol 16 (3) ◽

pp. 137-140 ◽

Cited By ~ 3

Author(s):

M. Lawrence

Keyword(s):

Continuous Wave ◽

Michelson Interferometer ◽

Laser Wavelength ◽

Continuous Wave Laser ◽

Wavelength Measurement ◽

Wave Laser

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High-Accuracy Calibration of CMM Using Temporal-Coherence Fiber Interferometer with Fast-Repetition Comb Laser

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.625.66 ◽

2014 ◽

Vol 625 ◽

pp. 66-72

Author(s):

Narin Chanthawong ◽

Satoru Takahashi ◽

Kiyoshi Takamasu ◽

Hirokazu Matsumoto

Keyword(s):

Interference Fringe ◽

Laser Interferometer ◽

Fiber Type ◽

Michelson Interferometer ◽

Temporal Coherence ◽

Measuring System ◽

Continuous Laser ◽

Reference Length ◽

Measuring Machine ◽

5 Ghz

A coordinate measuring machine (CMM) is a measuring system with the means to move probing system and capability to determine spatial coordinates on working surface. CMM is used in many industry fields from few micrometers of work pieces to a 5-meter truck. The verification method of CMM is done following international standard. The artifacts for calibrated reference length are the end standards, such as gauge block and step gauge, or laser interferometer for large size CMM. The current laser interferometer is operated by continuous laser and interference fringe counting. One constraint of continuous laser is an incremental measurement. The measurement path cannot be interrupted during the measurement period. We developed a new absolute interferometer system from a short-pulse mode-locked fiber laser. A Fabry–Pérot etalon (FPE) is used to select high-frequency parts of repetition-frequency modes of the mode-locked comb laser at the wavelength of 1.55 μm. The 5-GHz repetition-modified laser beam, which is realized by a new fiber-type FPE, is transmitted to a fiber-type Michelson interferometer. The interference fringes exhibit a temporal coherence interference and can be used for measuring spatial positioning. The temporal coherence between different pairs of modified pulse trains is referred to as absolute length standards. The performance of CMM was determined directly from different positions of two interference fringe patterns.

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