M by N Wavelength Selective Switch Matrix
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Solution Overview
Problem
Current wavelength-selective switches (WSS) in optical communication systems face limitations in efficiently routing and switching multiple wavelength channels due to complexity and cost, particularly in achieving flexible and scalable architectures for dynamic reconfiguration and high port counts.
Innovation Solution
The proposed M×N WSS design incorporates a first and second port array with a dispersion element, imaging lens, and a unitary switching element, including polarization diversity and expansion lenses, to independently steer beams based on wavelength, with optional features like beam crossing and path separation elements, enabling flexible routing and reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional WSS designs are used to achieve flexible wavelength routing, then wavelength selectivity and reconfigurability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The WSS device is segmented into distinct functional modules: a dispersion element (grating) for wavelength separation, an imaging lens for focal plane formation, and a switching matrix with independently controllable switching elements. Each module performs a specific function, allowing independent optimization and simplifying manufacturing while maintaining overall system flexibility for wavelength routing
Solution Approach 2:
The patent transitions from traditional one-dimensional wavelength filtering to a two-dimensional switching matrix architecture where switching elements are arranged in rows and columns. This dimensional expansion enables simultaneous control of multiple wavelength channels across multiple input/output ports, achieving flexible routing without proportionally increasing device complexity
2Adaptability or versatility
If high port count WSS is implemented to increase network capacity, then network scalability is improved, but device complexity and cost increase
Solution Approach 1:
The switching matrix employs universal switching elements that can route any wavelength channel to any output port through a standardized interface. Each switching element performs the same function but can be independently controlled, allowing the system to scale to high port counts while using identical, cost-effective components throughout the device
Solution Approach 2:
The patent uses multiple identical switching elements arranged in a matrix pattern, where each element is a copy of the basic switching unit. This modular copying approach allows systematic scaling from low to high port counts by simply increasing the number of identical elements, thereby controlling manufacturing cost through standardization
3Productivity
If dynamic reconfiguration capability is enhanced for rapid network adaptation, then reconfigurability speed is improved, but device complexity increases
Solution Approach 1:
The switching matrix implements dynamic reconfiguration through independently controllable switching elements that can change their routing state in response to control signals. This dynamic capability allows rapid network adaptation by electronically reconfiguring the routing paths without mechanical movement, achieving high reconfiguration speed while keeping the physical device structure relatively simple
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 design enhances the flexibility and scalability of optical communication systems by allowing independent control of beam steering and routing, reducing manufacturing costs while maintaining high port counts, thus improving network efficiency and reconfigurability.
Implementation Method 1
a dispersion element configured to split each beam at different angles according to different wavelength components on a dispersion plane
Implementation Method 2
an imaging lens configured to readjust and focus the wavelengths of the beams split by the dispersion element
Implementation Method 3
the first switching part being configured to steer the beams independently on a switching plane such that angles of the beams are controlled according to wavelengths thereof
Implementation Method 4
the second switching part being configured to steer beams independently on the switching plane such that a desired port in the second port array receives a beam from a corresponding port in the first port array
Data Source
AI summary
An M×N wavelength selective switch (WSS) for an optical communication system includes: a first port array consisting of M ports for emitting/receiving beams, where M is a natural number equal to or greater than 2; a second port array consisting of N ports for emitting/receiving beams, where N is a natural number equal to or greater than 2; a dispersion element configured to split each beam at different angles according to different wavelength components on a dispersion plane; an imaging lens configured to readjust and focus the wavelengths of the beams split by the dispersion element; and a unitary switching element that includes a first switching part and a second switching part, the first and second switching parts being physically combined to form one integral component, the first switching part being configured to steer the beams independently on a switching plane such that angles of the beams are controlled according to wavelengths thereof, the second switching part being configured to steer beams independently on the switching plane such that a desired port in the second port array receives a beam from a corresponding port in the first port array.