Optical Antenna Duplex Waveguide Beam Shaping
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Solution Overview
Problem
Existing optical communication systems for satellites face challenges in achieving simultaneous duplex communication due to the point-ahead angle (PAA) issue, requiring complex mechanical mechanisms and multiple optical components, which are unreliable and power-intensive, and result in redundancy and high propagation loss.
Innovation Solution
The use of a beam shaper with a cylindrical lens configuration in a single-mode waveguide-based optical antenna that adapts the duplex propagation pattern to enclose both partner antenna positions, allowing for elongated or circular shapes depending on the PAA, reducing the need for mechanical switches and increasing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex mechanical mechanisms and multiple optical components are used to achieve simultaneous duplex communication, then duplex communication capability is improved, but reliability deteriorates and device complexity increases
Solution Approach 1:
The patent combines transmit and receive optical paths into a single shared waveguide structure. The same waveguide core carries both forward (transmit) and backward (receive) propagating optical signals, eliminating the need for separate mechanical switching mechanisms and multiple discrete optical components. This merging approach maintains duplex communication capability while significantly improving reliability by reducing mechanical failure points.
Solution Approach 2:
The waveguide structure is designed to serve multiple functions simultaneously: it acts as both transmit and receive path, supports both forward and backward propagation, and enables both optical signal transmission and reflection. This multi-functionality eliminates the need for dedicated mechanical switches and multiple optical components, reducing device complexity while maintaining full duplex capability.
2Adaptability or versatility
If complex mechanical mechanisms and multiple optical components are used to achieve simultaneous duplex communication, then duplex communication capability is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple optical functions into a single integrated waveguide structure. Instead of using separate components for transmit and receive paths along with mechanical switching mechanisms, the invention uses one waveguide that handles both directions of communication, dramatically reducing the total number of optical components and simplifying the overall device architecture.
Solution Approach 2:
The waveguide is designed as a universal optical path that simultaneously supports transmit and receive operations, forward and backward propagation, and multiple optical modes. This multi-functional design eliminates the need for multiple dedicated components and complex mechanical switching systems, directly reducing device complexity while maintaining full duplex capability.
3Device complexity
If traditional optical paths are used without adaptive beam shaping, then device complexity is reduced, but propagation loss increases
Solution Approach 1:
The patent introduces dynamic beam shaping capability within the waveguide structure. The optical path is not static but adapts its propagation characteristics through controlled beam shaping, allowing the system to optimize signal transmission and reduce propagation loss while maintaining a relatively simple integrated waveguide structure. This dynamic adaptation enables low loss transmission without requiring complex external optical components.
4Adaptability or versatility
If mechanical switches are used for path switching, then adaptability is improved, but power consumption increases and reliability deteriorates
Solution Approach 1:
The patent eliminates mechanical switches by merging transmit and receive paths into a single waveguide structure. Path switching is achieved through optical domain mechanisms rather than mechanical movement, completely removing the power consumption associated with actuating mechanical switches while maintaining full path switching capability through optical control.
Solution Approach 2:
The invention replaces the mechanical switching system with an optical-based path selection mechanism. Instead of using motorized mechanical switches that consume power and have reliability issues, the system uses optical waveguide coupling and beam shaping to achieve path switching, substituting mechanical action with optical field control that requires no external power for switching operations.
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 simplifies the design, reduces power consumption, and minimizes propagation loss while maintaining high communication efficiency by using a single-mode waveguide and adaptive beam shaping, enabling reliable and efficient duplex communication across varying PAA conditions.
Implementation Method 1
The use of a beam shaper with a cylindrical lens configuration in a single-mode waveguide-based optical antenna that adapts the duplex propagation pattern to enclose both partner antenna positions
Implementation Method 2
a proximal optical path (40') including a bidirectional waveguide (43) for duplex propagation of the transmit beam (41) from at least one transmit source (41') and of the receive beam (42) towards at least one receive receiver (42')
Implementation Method 3
The communications may be performed through optical beams, i.e., small bundles of optical rays which are sent, e.g. through an optical antenna, in the direction of the receiver
Data Source
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AI summary
Examples relates to optical communications between optical antennas and related methods. Examples relate to waveguide-based duplexing with point-ahead angle (PAA) implementation. In one example, there is provided an optical antenna for a duplex link formed by a transmit, Tx, beam towards a partner optical antenna and a receive, Rx, beam from the partner antenna comprises: a proximal optical path including a bidirectional waveguide for duplex propagation of the Tx beam from at least one Tx source and of the Rx beam towards at least one receiver; and a distal duplex free-space optical path for duplex propagation of the Tx beam towards the partner optical antenna and the Rx beam from the partner optical antenna. The proximal waveguide path comprises a non-reciprocal optical element including a first connector, a second connector, and a third connector, so as to direct: light input from the first connector to the second connector; and light input from the second connector to the third connector. The first connector is configured to receive the Tx beam from at least one Tx source, the second connector is optically communicating with the bidirectional waveguide, and the third connector is configured to output the Rx beam.