Thermally Coupled Resonance Modulator for Wavelength Stability
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Solution Overview
Problem
Optical communication systems face challenges in maintaining signal stability and efficiency, particularly as operating speeds and data volumes increase, especially in short-distance communications like board-to-board or chip-to-chip connections, where existing technologies struggle to effectively modulate and transmit multiple wavelengths without significant temperature-induced wavelength shifts.
Innovation Solution
An optical transmitter and communication system utilizing a thermally coupled resonance modulator integrated on a semiconductor substrate with high thermal conductivity materials, which includes a wavelength control unit that stabilizes optical signals by using prototype filters, electrodes, and circulators to modulate intensity and wavelength, and incorporates a trench with low thermal conductivity material to manage external heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a resonance modulator is used to modulate optical signals, then data transmission capacity is increased, but temperature-induced wavelength shifts cause signal instability
Solution Approach 1:
The patent changes the thermal parameter of the substrate by using a high thermal conductivity material (such as diamond or silicon carbide) to replace conventional low thermal conductivity materials. This parameter change enables efficient heat dissipation from the resonance modulator, maintaining stable operating temperature and preventing wavelength shifts, thereby resolving the contradiction between high data transmission capacity and signal stability
Solution Approach 2:
The high thermal conductivity substrate acts as a thermal intermediary between the resonance modulator and the heat sink. It facilitates efficient heat transfer from the modulator to the environment, preventing temperature accumulation that would cause wavelength drift, thus maintaining signal stability while enabling high-speed data transmission
2Speed
If operating speed and data volume are increased, then communication system performance is improved, but temperature control becomes more difficult leading to wavelength shifts
Solution Approach 1:
The patent fundamentally changes the thermal conductivity parameter of the substrate material to high values, enabling the system to handle higher operating speeds and data volumes without experiencing temperature-induced wavelength shifts. The high thermal conductivity material rapidly conducts away heat generated during high-speed operation, maintaining temperature control
3Device complexity
If multiple wavelengths are transmitted without effective modulation, then device simplicity is maintained, but signal stability and transmission efficiency deteriorate
Solution Approach 1:
The patent merges the resonance modulator and the high thermal conductivity substrate into an integrated structure. This combination allows effective modulation of multiple wavelengths while maintaining device simplicity, as the thermal management function is built into the substrate itself rather than requiring separate cooling systems
Solution Approach 2:
By changing the thermal conductivity parameter of the substrate, the patent enables the resonance modulator to effectively handle multiple wavelengths with improved signal stability, maintaining a relatively simple device structure while achieving better 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
This solution enhances signal stability and efficiency by maintaining resonance wavelengths despite temperature changes, allowing for increased data transmission capacity and reduced nonlinear effects, thereby improving performance in high-speed, high-data-volume optical communication systems.
Implementation Method 1
a high thermal conductivity material is used
Implementation Method 2
a resonance modulator that is thermally coupled
Implementation Method 3
a trench with low thermal conductivity material to manage external heat
Data Source
AI summary
An optical transmitter for an optical communication system includes a light source that outputs optical signals having a plurality of wavelengths, and a wavelength control unit. The wavelength control unit receives an optical signal from the light source, resonates an optical signal having a first wavelength, modulates the optical signal of the first wavelength with a first transmission data signal to obtain an intensity modulated optical signal, and outputs the intensity modulated optical signal. The wavelength control unit may be integrally formed on a semiconductor substrate in which a high thermal conductivity material is used. Alternatively, a trench that intercepts external heat may be formed in a boundary surface of the wavelength control unit, and may be filled with a low thermal conductivity material.