Ring Waveguide Resonance Wavelength Correction via Diode Leakage Current
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Solution Overview
Problem
Resonant ring devices in integrated photonic circuits face challenges in measuring and correcting the resonance wavelength, leading to operational inefficiencies due to manufacturing and temperature variations.
Innovation Solution
A device comprising a ring waveguide, a diode, and circuits to measure leakage current, determine the resonance wavelength, and adjust the waveguide temperature to align with a targeted value, using a diode with its junction concentric to the waveguide and a heating element controlled by the leakage current signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resonant ring devices are used to transmit data via light signal, then data transmission capability is improved, but the resonance wavelength may be offset due to manufacturing variations and temperature changes, affecting operational efficiency
Solution Approach 1:
The patent implements a feedback mechanism by measuring the leakage current in the reverse-biased diode, which provides information about the resonance wavelength offset. This measurement feedback enables the system to detect and correct wavelength deviations, resolving the contradiction between maintaining data transmission capability and ensuring resonance wavelength accuracy.
Solution Approach 2:
The patent changes the operating parameters of the diode by applying reverse bias voltage to convert it into a wavelength-sensitive detector. This parameter change enables the diode to provide leakage current measurements that indicate resonance wavelength offset, allowing for correction of manufacturing variations and temperature-induced drifts.
2Measurement precision
If a diode is integrated with the ring waveguide to measure leakage current, then resonance wavelength measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by using the diode for both its original purpose (e.g., modulation or switching) and as a wavelength measurement detector through leakage current measurement. This universal use of the diode component enables resonance wavelength measurement without adding separate dedicated measurement components, thereby avoiding increased device complexity.
Solution Approach 2:
The patent merges the measurement function with the existing diode component by utilizing its leakage current characteristic. Instead of adding a separate measurement device, the system combines the detection capability with the functional diode already present in the resonant ring structure, eliminating the need for additional components and reducing overall device complexity.
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
Enables precise measurement and correction of the resonance wavelength, improving the operational efficiency of resonant ring devices by aligning the resonance wavelength with a targeted value, thus enhancing data transmission in integrated photonic circuits.
Implementation Method 1
a first circuit configured to supply a signal representative of a leakage current in the reverse-biased diode
Implementation Method 2
a heating element configured to modify the temperature of the waveguide
Data Source
AI summary
A device, includes: a ring waveguide; a diode comprising a junction extending at least partly in the ring waveguide; and a first circuit configured to supply a signal representative of a leakage current in the diode.