An n-channel m-bit integrated optical waveguide tunable delay line

Abstract

The invention discloses an N-channel M-bit integrated optical waveguide tunable delay line, which is mainly used in the field of phased array radar. The delay accuracy of the delay line is not high, the volume and weight are large, and the space utilization rate is not high. The reconfigurability of the delay line is small and the delay cannot be adjusted. This application forms a M-bit tunable optical waveguide delay line by cascading the MZI optical switching unit and the delay line unit alternately, and based on the thermo-optical effect, by controlling the The power on the electrode of the optical switch changes the phase relationship of the light waves on the two interference arms, realizes the selection of different paths, selects different delay line units, and then selects different delay times. The delay accuracy Δt reaches the level of picoseconds, which meets the requirements of radar The requirement for higher and higher working frequency; by adjusting the length difference between the outer arc waveguide and the inner arc waveguide of the delay line unit to adjust the delay amount to realize the tunable delay amount, this application meets the increasing demand for radar operating frequency, and has the advantages of Wide application prospects.

Description

technical field [0001] The invention belongs to the field of phased array radar, in particular to an N-channel M-bit integrated optical waveguide tunable delay line technology of a planar optical waveguide. Background technique [0002] Tunable optical delay lines are mainly used for signal synchronization and buffering, signal processing and microwave photonic systems, optical coherence tomography technology and beamforming technology in phased array radar. Tunable optical delay line is a key component in phased array radar. Due to the limitation of aperture effect and aperture transit time in traditional phased array radar, it is difficult to achieve large instantaneous bandwidth at large scanning angles. By using tunable optical delay Line, can achieve large instantaneous bandwidth under large scanning angle, and at the same time have advantages in improving radar resolution, recognition ability, and solving multi-target imaging. With the increase of radar operating freq...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, this application proposes an N-channel M-bit integrated optical waveguide tunable delay line, which uses an optical real-time delay unit instead of a purely electric real-time delay unit, and solves the two major technical problems of traditional phased array radar. The bottleneck, that is, the limitation of instantaneous large bandwidth and the problem of beam skew, make the optically controlled phased array antenna system lighter in weight, smaller in size, higher in integration, reconfigurable, higher in space utilization, and lower in power consumption. Low cost, strong anti-electromagnetic interference ability, etc.

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