Closed-Track Optical Delay Module for Terahertz Signal Quality
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Solution Overview
Problem
Current photoelectric detection systems face challenges in achieving high-quality and high-efficiency optical delay devices, particularly in the terahertz range, where existing optical delay modules fail to provide sufficient signal quality and detection efficiency due to limitations in beam transmission and optical path length adjustment.
Innovation Solution
A closed-track optical delay module is designed, comprising a cylindrical component with a smooth curve track line structure, a straight line groove, and a positioning convex, which allows for high-speed rotation and linear movement of the light conversion device, ensuring undistorted light transmission and achieving a time delay of up to 1000 ps without spot distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical delay modules are used, then the system can achieve basic time delay functionality, but beam transmission quality deteriorates and signal distortions occur
Solution Approach 1:
The patent employs a curved track structure instead of straight linear paths for the optical delay mechanism. The light conversion device moves along a curved trajectory defined by the track, which maintains beam quality by avoiding abrupt directional changes and mechanical distortions associated with straight-line mechanical systems. This curvature-based design preserves signal integrity while achieving the required time delay.
Solution Approach 2:
The patent replaces traditional mechanical optical delay mechanisms with a light conversion device that converts between different light modes. Instead of using complex mechanical movements to change optical path length, the system uses optical conversion techniques to achieve time delay, thereby eliminating mechanical-induced beam distortions and signal quality degradation.
2Productivity
If optical path length is increased to achieve longer time delay, then detection efficiency improves, but beam transmission quality deteriorates
Solution Approach 1:
The patent transitions from one-dimensional linear optical path extension to a curved two-dimensional trajectory for the light conversion device. This dimensional change allows the system to achieve longer effective optical path length (and thus longer time delay) while maintaining beam quality through the smooth curved path, avoiding the signal degradation that occurs with extended straight-line mechanical systems.
3Device complexity
If mechanical components are used for optical path adjustment, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The curved track structure is designed with smooth continuous curvature to minimize manufacturing complexity. By using a curved rather than straight or segmented path, the system reduces the number of joints, connections, and alignment points that would require high manufacturing precision. The continuous curved geometry can be manufactured as a single integrated component, lowering precision requirements while maintaining optical performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The closed-track optical delay module significantly enhances the detection efficiency of photoelectric detection systems, particularly in terahertz systems, by maintaining beam quality and preventing signal distortions, enabling applications in various systems including terahertz detection, optical coherent tomography, and laser remote focusing.
Implementation Method 1
An optical delay line is an opto-mechanical integrated device capable of changing a length of an optical path, which is able to realize the transformation of spatial displacement to time delay
Data Source
AI summary
A closed-track optical delay module, a terahertz system, and a photoelectric system are provided. The closed-track optical delay module comprises a first constraint component with a closed-track line structure, a second constraint component with a straight line groove, a third constraint component with a positioning convex, a light conversion device, a housing, and a driving control device. The positioning convex forms a constraint fit relationship with the closed curve groove and straight line groove. One of the first, second, and third constraint components is connected with the driving control device, the other is fixedly disposed, a next one is connected with the light conversion device and moves parallel to the straight line groove. A light input interface is used for an incident light to be irradiated onto the light conversion device. A light output interface is used for a delayed beam to be emitted from the housing.