Voltage-Controlled Cladding Layer for Compact Beam Steering
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Solution Overview
Problem
Existing beam steering technologies, such as mechanical rotation and optical phased arrays, face challenges including high costs, large volume, and errors in phase modulation, particularly when steering laser beams.
Innovation Solution
A beam steering device with a waveguide and a cladding layer whose refractive index varies with voltage, combined with an electrode layer featuring independently controllable electrodes, allowing for electrical steering of laser beams without altering the waveguide's refractive index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical rotation method is used to steer laser beam, then beam steering function is achieved, but device volume becomes large and cost increases
Solution Approach 1:
The patent replaces mechanical rotation systems with an optical phased array that uses electrical control to steer beams. Multiple waveguides with independently controllable phase modulators create beam steering through optical interference patterns, eliminating motors and mechanical moving parts while achieving the same beam direction control function.
Solution Approach 2:
The patent introduces phase modulators as intermediary elements between the waveguides and the output beam. These modulators control the phase of light in each waveguide independently, allowing electronic adjustment of beam direction without mechanical movement. The phase modulators act as mediators that translate electrical control signals into optical phase changes for beam steering.
2Ease of operation
If optical phased array method is used with multiple waveguides, then beam steering is achieved, but device volume increases and phase modulation errors occur
Solution Approach 1:
The patent controls beam steering by changing the phase parameter of light in each waveguide independently through phase modulators. By adjusting phase values electronically rather than mechanically, the system achieves precise beam direction control without the errors associated with mechanical phase modulation, while maintaining a compact integrated waveguide structure.
3Ease of operation
If mechanical rotation system is used, then beam steering is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive mechanical rotation systems with an optical phased array using integrated waveguides and phase modulators. This electrical control approach eliminates costly mechanical components like motors and precision mechanical assemblies, reducing manufacturing costs while maintaining beam steering functionality through optical interference control.
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
This solution enables efficient, high-speed beam steering with a wide field of view, minimizing beam loss and allowing for steering of various wavelengths, while reducing the need for complex mechanical systems and minimizing errors.
Implementation Method 1
a cladding layer provided on the waveguide and including a material having a refractive index that varies according to a voltage applied thereto
Data Source
AI summary
A beam steering device includes a waveguide configured to transmit a beam therethrough; a cladding layer provided on the waveguide and including a material having a refractive index that varies according to a voltage applied thereto; and an electrode layer including at least two electrodes configured to independently voltages to at least two portions of the cladding layer.