MEMS Optical Switch Alignment Using Co-Aligned Control Beams
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Solution Overview
Problem
Optical circuit switches (OCS) face challenges in accurately and precisely aligning optical beams, leading to computational inefficiencies and latency in optical networks due to the need for converting optical signals to electronic signals for processing.
Innovation Solution
An optical switch system utilizing a light source, MEMS mirror array, beam combiner, beam splitter, and image sensor, along with hardware processors, to align input and output fibers by monitoring control beams and adjusting MEMS mirrors based on centroid intensity and position, employing machine learning for calibration and alignment optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electrical packet switches are used to direct data packets, then routing functionality is achieved, but conversion between optical and electronic signals increases computational cost and latency
Solution Approach 1:
The patent replaces electrical packet switching with optical circuit switching, eliminating the need for optical-to-electronic conversion. The system uses optical switches that directly route optical signals in the optical domain, substituting electrical processing mechanisms with optical routing mechanisms, thereby reducing computational cost and latency while maintaining routing functionality
Solution Approach 2:
The patent introduces a control beam as an intermediary to enable optical switches to identify and route communication beams. The control beam carries routing information optically, allowing the system to achieve intelligent routing without electrical signal conversion, thus resolving the contradiction between routing capability and conversion complexity
2Loss of time
If optical circuit switches are used for all-optical switching, then latency is reduced and bandwidth is increased, but accurate beam alignment becomes challenging
Solution Approach 1:
The patent uses a control beam as an intermediary to solve the beam alignment problem. The control beam is co-aligned with the communication beam and carries routing information, allowing optical switches to accurately identify and route communication beams without requiring extremely precise manual alignment, thus reducing latency while managing alignment complexity
Solution Approach 2:
The patent implements feedback mechanisms where image sensors detect the position of control beams and provide information to adjust optical switch settings. This feedback loop enables dynamic optimization of beam alignment, ensuring accurate routing while compensating for manufacturing tolerances and environmental variations
3Ease of operation
If electrical packet switches convert optical signals to electronic signals for processing, then data routing is achieved, but power consumption increases
Solution Approach 1:
The patent replaces electrical signal processing with optical signal processing throughout the system. Optical circuits process and route data directly in the optical domain without conversion to electrical signals, eliminating the power-intensive conversion processes while maintaining full data routing capability, thus resolving the contradiction between operational capability and energy consumption
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
Enhances beam alignment accuracy and reduces latency by optimizing the alignment process, improving operational efficiency and reducing computational costs in optical networks.
Implementation Method 1
a beam combiner configured to combine a communication beam and the control beam into a co-linear path towards a MEMS mirror
Implementation Method 2
a beam splitter configured to split the communication beam and the control beam after reflection by the MEMS mirror
Implementation Method 3
a beam splitter configured to split the communication beam and the control beam after reflection by the MEMS mirror
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
Disclosed are systems and methods associated with an improved optical switch. An optical switch may include light sources configured to produce a set of control beams co-aligned with a communication beam and that interact with each of a set of MEMS mirrors. Each of the set of control beams are passed through a respective screen so as to generate an image corresponding to a layout of an associated MEMS mirror that can then be analyzed to affect an operation of the optical switch, such as by managing an orientation and/or position of each MEMS mirror. In some aspects, the one or more hardware processors may utilize AI techniques to reduce processing time and learn behavior of the optical switch. In some aspects, the system may utilize the information to generate alerts and/or information relating to the end of life or other operational parameters of the optical switch.