Optical Modulator Coplanar Layout for Resonance Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The propagation efficiency of optical signals in optical waveguides positioned between one ground wire and a signal wire in a coplanar line is decreased due to resonance, leading to deteriorated propagation characteristics.
Innovation Solution
An optical modulator and transceiver design that includes a waveguide positioned between the first and second ground wires, with an adjustment member between the second ground wire and the signal wire, which adjusts the resonance frequency and refractive index to improve signal propagation efficiency and reduce resonance losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a waveguide is positioned between one ground wire and a signal wire in a coplanar line, then the structure is simplified, but the propagation efficiency of optical signals is decreased due to resonance
Solution Approach 1:
An adjustment member is introduced as an intermediary element between the second ground wire and the signal wire. This adjustment member modifies the resonance characteristics of the coplanar line without requiring changes to the waveguide structure itself, thereby resolving the contradiction between structural simplicity and propagation efficiency
Solution Approach 2:
The resonance frequency of the coplanar line is adjusted by modifying parameters of the adjustment member (such as its position, size, or material properties). By changing these parameters, the resonance frequency is shifted away from the operating frequency band, improving propagation efficiency while maintaining the simple coplanar line structure
2Device complexity
If the resonance frequency is not adjusted, then the structure remains simple, but signal loss increases due to resonance within the frequency band
Solution Approach 1:
The adjustment member serves as a mediator that tunes the resonance characteristics of the coplanar line. It is positioned between the ground wire and signal wire to modify the electromagnetic field distribution and shift the resonance frequency, thereby improving signal propagation without complicating the overall structure
Solution Approach 2:
The adjustment member provides dynamic control over the resonance frequency of the coplanar line. By making the structure adjustable rather than fixed, the system can adapt to different operating conditions and frequency bands, improving reliability while maintaining structural simplicity
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 design enhances signal propagation characteristics by minimizing resonance within the frequency band of the electrical signal, maintaining high transmittance and reducing signal loss, thereby improving the overall performance of the optical modulator and transceiver.
Implementation Method 1
The output portion is configured to output an optical signal input from the input portion and modulated by a signal propagating along the coplanar line
Implementation Method 2
The propagation efficiency of optical signals in optical waveguides positioned between one ground wire and a signal wire in a coplanar line is decreased due to resonance
Data Source
AI summary
An optical modulator includes: a substrate; a coplanar line, on the substrate, including a first ground wire, a second ground wire, and a signal wire, between the first ground wire and the second ground wire, coupled to each of the first ground wire and the second ground wire; a waveguide, between the first ground wire and the signal wire along the coplanar line on the substrate in plan view of the substrate, including an input portion and an output portion for an optical signal, the output portion configured to output an optical signal input from the input portion and modulated using a signal that propagates along the coplanar line; and an adjustment member, between the second ground wire and the signal wire along the coplanar line on the substrate in plan view of the substrate, not including an input portion or an output portion for an optical signal.