Intensity properties of output light in prisms laser gyro with mechanical dither bias

Cheng-Kang, Yao; Zeng, Xiaodong; Changqing, Cao

doi:10.7498/aps.61.094216

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…[4,5] In engineering practical use, it is found that the amplitude of an output voltage signal of a prism laser gyro is always modulated by dither bias, which badly influences the measurement accuracy of the gyro. [6,7] Recently, signal process technology and output coupled light detection for prism laser gyros have been studied. In 2008, Wan el al.…”

Section: Introductionmentioning

confidence: 99%

Polarization properties in a prism laser gyro with mechanical dither bias

Cheng-Kang¹,

Zeng²,

Changqing³

2012

Chinese Phys. B

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Theoretical analysis and experimental research on the polarization properties of output light in gyro are carried out to investigate the phenomenon that the amplitude of an output voltage signal is modulated by dither bias in laser gyros consisting of totally reflecting prisms. Taking the effect of prism stress birefringence into account, an analytical formula of the output light intensity in the gyro and the relationship between the polarization parameter and the amplitude modulation of the output signal are obtained and discussed. For the first time, the polarized power value of the output light is adopted as a basis to estimate the output signal amplitude fading extent of laser gyros. Experimental results demonstrate that when the value of polarized power of output light is below 25.5% of that in ideal static case, the standard error is over 0.0337 dBm, and the displacement extent of the prism is higher than 53% of the radius of the beam waist in the gyro cavity, the amplitude modulation extent of gyro output signal can reach up to 16%, which badly influences the measurement accuracy of the laser gyro. Using this polarized power detecting measurement method can repair the gyro immediately during its fabrication process, improve the testing and production efficiency and shorten the product development cycle.

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Section: Introductionmentioning

confidence: 99%

Polarization properties in a prism laser gyro with mechanical dither bias

Cheng-Kang¹,

Zeng²,

Changqing³

2012

Chinese Phys. B

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“…nonreciprocity of the scattering, and a polarization effect, resulting in a zero shift of TRPLG [14].…”

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confidence: 99%

Effect of frequency stabilization on beam shift of total reflection prism laser gyro

Ma¹,

Huang²,

Liang³

et al. 2022

EPL

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For the phenomenon of degradation of the performance of total reflection prism laser gyro before and after reset jump, this paper investigates the effect of frequency stabilization on the beam shift of total reflection prism laser gyro using a matrix optics method, and proposes a method to calculate the beam shift with frequency stabilization. The numerical simulation and experimental results show that, unlike the beam shift characteristics caused by the prism temperature, the frequency stabilization additionally causes an approximately equal beam shift at each prism interface, and the shift is proportional to the frequency stabilization control amount. It is pointed out that the large abrupt change of beam propagation path before and after reset jump is the main reason for the degradation of total reflection prism laser gyro performance, and the frequency stabilization control method of reset jump once for each optical wavelength adjustment can effectively reduce the beam shift caused by frequency stabilization.

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