A Pulsed Electric Field Sensor Based on Asymmetric Straight Waveguide Interferometer
A pulsed electric field and interferometer technology, applied in electrostatic field measurement and other directions, can solve the problems of limited time-domain waveform restoration of signals, poor temperature stability and measurement accuracy, limited antenna frequency range, etc. Application, wide measurement range and frequency response range, effect of low transmission loss
Active Publication Date: 2022-06-17
XIDIAN UNIV
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Problems solved by technology
The problem is that the frequency range of the conventional antenna is limited, while the frequency components of the pulse signal are relatively rich, and the bandwidth is wide, which leads to the limited authenticity of the time-domain waveform restoration of the signal.
In addition, LiNbO 3 In addition to the electro-optic effect, the crystal substrate also has piezoelectric, acousto-optic, thermo-optic and other effects, which will cause the working point of the sensor to be sensitive to the electric field and external environmental factors at the same time, and the temperature stability and measurement accuracy are poor.
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[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings to help understand the content of the present invention.
[0022] like figure 1 As shown, it is a schematic structural diagram of a pulsed electric field sensor based on an asymmetric straight waveguide interferometer provided by the present invention. The pulsed electric field sensor based on asymmetric straight waveguide interferometer includes LiNbO 3 Crystal substrate 1, the LiNbO 3 The crystal substrate 1 is provided with an asymmetric Mach-Zehnder interferometer. The asymmetric Mach-Zehnder interferometer includes a linear first waveguide arm 4 and a second waveguide arm 5 arranged in parallel. Several pairs of antennas 2 and electrodes 3 are arranged on both sides of the waveguide arm 4 .
[0023] like figure 2 As shown, it is a dimension diagram of the antenna and electrodes of a pulsed electric field sensor based on an asymmetric straight ...
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Abstract
The invention discloses a pulsed electric field sensor based on an asymmetric straight waveguide interferometer, LiNbO 3 An asymmetric Mach-Zehnder interferometer is provided on the crystal substrate, and the asymmetric Mach-Zehnder interferometer includes a linear first waveguide arm and a second waveguide arm arranged in parallel, and several forming The right antenna and electrode, the antenna is a conical dipole antenna, LiNbO 3 The optical axis of the crystal substrate is parallel to the x direction, the arm lengths of the first waveguide arm and the second waveguide arm are equal, the z-direction waveguide width and the x-direction waveguide depth are different, the input optical waveguide and the output optical waveguide are Y-shaped, which is consistent with The two waveguide arms are connected by an adiabatic tapered waveguide. The width and depth of the input optical waveguide and the output optical waveguide are the same. The invention has wide measurement range and frequency response range, high extinction ratio, low transmission loss, high stability, strong anti-interference and high measurement accuracy.
Description
technical field [0001] The invention relates to the technical field of optical waveguide and pulsed electric field detection, in particular to a pulsed electric field sensor based on an asymmetric straight waveguide interferometer. Background technique [0002] Electromagnetic pulses are transient electromagnetic phenomena with fast rising edges (on the order of ns), short durations, high peak field strengths (hundreds of V / m to hundreds of kV / m), and wide spectral ranges (hundreds of MHz to several hundreds of MHz). 10 GHz) and other characteristics. Electromagnetic pulses are generated during high-altitude nuclear explosions, high-power microwave pulse weapons, and high-intensity radars. Electromagnetic pulses can excite strong transient electromagnetic interference in the surrounding environment, resulting in short-term failure or even permanent damage to various electronic equipment and systems such as radar, communications, navigation, computers, and weapons control. ...
Claims
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IPC IPC(8): G01R29/14
CPCG01R29/14
Inventor李仙丽张航周金柱赵校庆李向龙康乐
OwnerXIDIAN UNIV