Coherent Light Receiving Optical Device Band Segmentation
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Solution Overview
Problem
Existing coherent light receiving optical devices face challenges in operating efficiently across wider spectrum ranges required for advanced coherent light communication technologies, such as 400 G and 800 G per single wavelength, due to the need for high precision process control and complex system designs that can affect high-speed signals.
Innovation Solution
A coherent light receiving optical device is designed with an optical switch group that switches between two preset bands, a 1×2 power beam splitter group that splits oscillation lights, an optical hybrid group that mixes signal and oscillation lights, and a detector group that converts mixed lights into photocurrents, allowing for multiplexing across different bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If specially designed optical devices are used to operate in wider spectrum ranges (100 nm for 400 G, even wider for 800 G), then the operating spectrum range is improved, but the device complexity and manufacturing precision requirements increase significantly
Solution Approach 1:
The optical device is divided into multiple sub-devices, each responsible for a specific wavelength band. The optical spectrum is segmented into multiple bands, and each band is processed by dedicated optical components. This segmentation allows the overall system to cover a wide spectrum range while each individual component operates within a narrower, more manageable range, reducing the complexity and manufacturing precision requirements for each sub-device.
2Adaptability or versatility
If specially designed optical devices are used to operate in wider spectrum ranges, then the operating spectrum range is improved, but the manufacturing precision requirements become extremely high leading to unacceptable cost
Solution Approach 1:
By segmenting the optical device into multiple sub-devices operating at different wavelength bands, each sub-device can be manufactured with standard precision requirements for its specific band. This avoids the need for extremely high manufacturing precision across the entire wide spectrum range, thereby reducing production costs while maintaining the overall wide operating spectrum capability.
3Reliability
If real-time feedback control is implemented for high speed signal ends, then the signal quality is improved, but the system complexity increases and high speed signals are affected
Solution Approach 1:
The feedback control system is segmented and applied separately to each wavelength band rather than implementing a single complex feedback system for the entire wide spectrum. Each band's feedback control operates independently with optimized parameters for that specific band, reducing the overall system complexity and minimizing interference with high-speed signals while maintaining signal quality.
4Productivity
If more wavelength channels are multiplexed to increase transmission rate, then the transmission rate is improved, but the total spectrum width required increases
Solution Approach 1:
The multiplexing system is divided into multiple segments, each handling a specific wavelength band with a subset of channels. By segmenting the channel allocation across different bands, the system can multiplex more total channels (increasing transmission rate) while each segment operates within a manageable spectrum width, allowing efficient utilization of the available optical spectrum.
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 the coherent light receiving optical device to efficiently operate across broader spectrum ranges, reducing the need for high precision process control and complex system designs, thereby lowering costs and maintaining high-speed signal integrity.
Implementation Method 1
an optical switch group, each optical switch of the optical switch group is configured to switch between two different preset bands and output two signal lights or two oscillation lights corresponding to the two different preset bands
Implementation Method 2
a 1×2 power beam splitter group, each 1×2 power beam splitter of the 1×2 power beam splitter group is configured to split one of the two oscillation lights into two split oscillation lights
Implementation Method 3
an optical hybrid group, each optical hybrid of the optical hybrid group is configured to mix the one splitting oscillation light from an oscillation path with one signal light from a signal path in the same preset band, to output a mixed light
Implementation Method 4
a detector group, each detector of the detector group is configured to convert the mixed lights of two different preset bands in the mixed lights into a photocurrent in the same detector
Data Source
AI summary
The present disclosure provides a coherent light receiving optical device. It includes: an optical switch group, each optical switch thereof is configured to switch between two different preset bands and output two signal lights or two oscillation lights corresponding to the two different preset bands; a 1×2 power beam splitter group, each 1×2 power beam splitter thereof is configured to split one of the two oscillation lights into two split oscillation lights; an optical hybrid group, each optical hybrid thereof is configured to mix the one split oscillation light from an oscillation path with one signal light from a signal path in the same preset band, to output a mixed light; a detector group, each detector thereof is configured to convert the mixed lights of two different preset bands in the mixed lights into photocurrent in the same detector, so as to multiplex the detector.