Optical Fiber-AWG Coupling Layout for Crosstalk-Free Parallel WDM
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Solution Overview
Problem
Current optical transceiver modules face challenges in increasing data transmission rates due to high costs, complexity, and issues like crosstalk and dispersion in wavelength division multiplexing and multi-channel parallel transmission technologies, with existing designs not effectively addressing power consumption and transmission rate limitations.
Innovation Solution
A coupling device integrating wavelength division multiplexing with multi-channel parallel transmission, utilizing a multi-layer arrayed waveguide grating and a clamping component to precisely align optical fibers and gratings, optimizing angle and spacing for efficient signal coupling and avoiding crosstalk and dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wavelength division multiplexing technology is used to increase data transmission rate, then transmission capacity is improved, but system complexity and cost increase due to high-precision light sources and optical filters requirements
Solution Approach 1:
The patent divides the optical fiber into multiple independent channels (first channel, second channel, third channel, fourth channel) with different wavelengths. Each channel can be independently modulated and transmitted through separate optical fibers, avoiding the need for complex wavelength division multiplexing equipment while achieving parallel data transmission to increase overall transmission capacity.
2Productivity
If multi-channel parallel transmission technology is used to increase transmission bandwidth, then transmission speed is improved, but timing delay differences and crosstalk problems occur between parallel channels
Solution Approach 1:
The patent extracts and isolates each wavelength channel into a separate optical fiber (first optical fiber for first wavelength, second optical fiber for second wavelength, etc.). This physical separation eliminates crosstalk between channels and allows each channel to be transmitted independently without timing delay issues, while still achieving parallel transmission to increase overall bandwidth.
3Productivity
If optical signal power and baud rate are continuously increased to further increase transmission rate, then data transmission capacity is improved, but power consumption of optical transceiver module increases
Solution Approach 1:
Instead of increasing the power or baud rate of a single channel (which would increase power consumption), the patent adds more transmission channels by using multiple wavelengths (first, second, third, and fourth wavelengths). This dimensional expansion from single-channel to multi-channel transmission achieves higher data transmission capacity while maintaining lower power consumption per channel.
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 solution significantly increases transmission capacity and rate of optical transceiver modules by enabling simultaneous transmission of multiple wavelengths, while reducing signal loss and improving structural stability and reliability.
Implementation Method 1
a plurality of arrayed waveguide gratings (7, 8, 9, 10) corresponding to the plurality of optical fibers (1, 2, 3, 4) respectively, and a plurality of wavelengths are output by the plurality of arrayed waveguide gratings (7, 8, 9, 10)
Implementation Method 2
an optical signal power at a transmitter or a baud rate per channel is continuously increased
Data Source
AI summary
A coupling device for a multi-channel optical fiber array and a multi-layer arrayed waveguide grating, includes: a first clamping component and a second clamping component. A plurality of optical fibers that are spaced apart in an X-axis direction are connected on the first clamping component, each optical fiber extends in a Y-axis direction, and a plurality of arrayed waveguide gratings that are spaced apart in the X-axis direction are connected on the second clamping component. Each arrayed waveguide grating extends in the Y-axis direction, the optical fibers and the arrayed waveguide gratings are disposed in a one-to-one coaxial mapping manner, each arrayed waveguide grating is right-trapezoid-shaped, and beveled surfaces of any two arrayed waveguide gratings are located on a same plane. A wavelength division multiplexing technology is combined with a multi-channel parallel transmission technology.