Beijing SWT Technology Development Co.

Beijing, China

Beijing SWT Technology Development Co.

Beijing, China
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Weng C.,Beihang University | Yang D.,Beihang University | Zheng Y.,Beijing SWT Technology Development Co. | Zhao Y.,Beihang University | Yao T.,Beihang University
Bandaoti Guangdian/Semiconductor Optoelectronics | Year: 2017

The half-wave voltage characteristics of Y-waveguide phase modulator used in fiber optical gyroscope(FOG), and their influence on system characteristics of FOG were analyzed. And the effects of temperature and light wavelength on the half-wave voltage were tested. The influence on FOG system of phase drift of Y-waveguide phase modulator were explained. The variations of phase drift with the changes of temperature and relative humidity were studied. Thus the measures for improving Y waveguide technology were put forward according to the experiment data. © 2017, Editorial Office of Semiconductor Optoelectronics. All right reserved.


Li J.-H.,Beijing SWT Technology Development Co. | Dang J.-C.,Beijing SWT Technology Development Co. | Zhang N.,Beijing SWT Technology Development Co. | Wang X.-Z.,Beijing SWT Technology Development Co. | And 3 more authors.
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2014

In order to make clear the storage life and weaknesses of Y waveguide multifunctional integrated optical devices at high and low temperature tests, the parameters of the insertion loss, splitting ratio, the extinction ratio and half-wave voltage were tested by carrying out high and low temperature life storage experiments. The tests continued until failure device was appeared. These tests expose two weaknesses: bad performances of the material and structure in coupling region. The tests show that the change of insertion loss ≤0.45 dB; splitting ratio variation ≤3.0%; polarization crosstalk ≤-30 dB; half-wave voltage variation ≤1.8%, and there is no failure device. Arrhenius model was used to evaluate the life of the device. The experiment results indicate that the Y waveguide can suffer the formidable conditions for 18000 h at 85°C, which is equivalent to that of 1.6×107 h at 22°C. By the Y waveguide experiments, the accelerated life and life estimate at high temperature condition are obtained, and the investigation could provide references for the applications in fiber optic gyroscopes and other sensing systems.

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