Zero shift in a Zeeman laser gyroscope with periodic modulation of intracavity losses

2021 ◽  
Vol 51 (6) ◽  
pp. 562-564
Author(s):  
E G Lariontsev
Keyword(s):  
Periodic Modulation ◽  
Zero Shift ◽  
Laser Gyroscope ◽  
Zeeman Laser

Digital system for frequency regulation and stabilisation of a four-frequency Zeeman laser gyroscope

2021 ◽  
Vol 51 (3) ◽  
pp. 276-282
Author(s):  
A.I. Varenik ◽  
V.N. Gorshkov ◽  
M.E. Grushin ◽  
M.A. Ivanov ◽  
Yu.Yu. Kolbas ◽  
...  
Keyword(s):  
Digital System ◽  
Frequency Regulation ◽  
Laser Gyroscope ◽  
Zeeman Laser

Studying Nonreciprocal Device Based on Permanent Magnet for Zeeman Laser Gyroscope

Trudy MAI ◽  
2020 ◽  
pp. 18-18
Author(s):  
Arkadii Kudravtsev ◽  
Nikita Savchenko ◽  
Igor Saveliev
Keyword(s):  
Permanent Magnet ◽  
Laser Gyroscope ◽  
Zeeman Laser

The nonmagnetic component of the zero bias of a Zeeman laser gyroscope

2018 ◽  
Vol 48 (3) ◽  
pp. 283-289 ◽  
Author(s):  
Yu Yu Kolbas ◽  
M E Grushin ◽  
V N Gorshkov
Keyword(s):  
Zero Bias ◽  
Laser Gyroscope ◽  
Zeeman Laser

scholarly journals Improved Algorithm for Mathematical Correction of the Zero Drift of the Zeeman Laser Gyro with Switching Longitudinal Mode of Generation

2019 ◽  
pp. 91-103
Author(s):  
Yu.Yu. Kolbas ◽  
M.A. Ivanov
Keyword(s):  
Longitudinal Mode ◽  
Zero Drift ◽  
Correction Factors ◽  
Temperature Changes ◽  
Laser Gyro ◽  
Magnetic Components ◽  
Laser Gyroscope ◽  
The Difference ◽  
The Moment ◽  
Zeeman Laser

The paper addresses time and temperature zero drifts in Zeeman laser gyroscope (RLG) operating in the mode of periodic adjustment of RLG to the longitudinal mode of generation with the opposite circular polarization of the light wave. In such a gyroscope, the zero drift can be divided into magnetic and non-magnetic components having different nature and making a significantly different contribution to the final error. Algorithmic methods are proposed for mathematical compensation of RLG zero drift, both with and without using initial calibration. It is shown that the simultaneous use of reproducible dependencies of the magnetic and non-magnetic zero drifts due to RLG temperature changes allows solving the problem of RLG zero drift correction in the optimal way. The correction factors are calculated from the temperature of a Zeeman laser gyro at the moment of activation. At the same time, using the difference between the temperatures of the gyroscope and gyro case, where it is installed, it is possible to determine the temperature of the Zeeman laser gyroscope at the moment of switching on, thereby eliminating the problem of calculating the correction factors when the gyroscope is turned off and then on again. Experimental results for several Zeeman laser gyroscopes with typical values of zero drifts are presented

Exploring the X-ray universe via timing: mass of the active galactic nucleus black hole XMMUJ134736.6+173403

2019 ◽  
Vol 15 (S356) ◽  
pp. 348-350
Author(s):  
Eva Šrámková ◽  
K. Goluchová ◽  
G. Török ◽  
Marek A. Abramowicz ◽  
Z. Stuchlík ◽  
...  
Keyword(s):  
Black Hole ◽  
Frequency Ratio ◽  
Active Galactic Nucleus ◽  
Periodic Modulation ◽  
X Ray ◽  
Upper Limit ◽  
M 10 ◽  
Frequency Ratios ◽  
Quasiperiodic Oscillations ◽  
Twin Peak

AbstractA strong quasi-periodic modulation has recently been revealed in the X-ray flux of the X-ray source XMMUJ134736.6+173403. The two observed twin-peak quasiperiodic oscillations (QPOs) exhibit a 3:1 frequency ratio and strongly support the evidence for the presence of an active galactic nucleus black hole (AGN BH). It has been suggested that detections of twin-peak QPOs with commensurable frequency ratios and scaling of their periods with BH mass could provide the basis for a method intended to determine the mass of BH sources, such as AGNs. Assuming the orbital origin of QPOs, we calculate the upper and lower limit on the AGN BH mass M, reaching M ≍ 107–109M⊙. Compared to mass estimates of other sources, XMMUJ134736.6+173403 appears to be the most massive source with commensurable QPO frequencies, and its mass represents the current observational upper limit on the AGN BH mass obtained from the QPO observations.

scholarly journals Radio Outbursts from Cygnus X-3

1974 ◽  
Vol 60 ◽  
pp. 401-405 ◽  
Author(s):  
V. A. Hughes ◽  
M. R. Viner ◽  
A. Woodsworth
Keyword(s):  
Flux Density ◽  
Periodic Modulation ◽  
X Ray ◽  
Infrared Wavelengths

The variation in flux density obtained at 10522 MHz for Bursts 2, 3, and 4 is compared with that obtained by others at frequencies down to 365 MHz. The bursts appear to have a quasi-periodic modulation with a period of 3–4 h, which is different from the 4.8-h periodicity observed at X-ray and infrared wavelengths. The modulation is attributed to a fluctuation in the size of the expanding cloud of particles produced by either an instability in the atmosphere of Cygnus X-3 or by a built-in instability in the cloud itself.

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