Optical Transceiver for Satellite ISL Beam Generation
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Solution Overview
Problem
There is an increasing need for high bandwidth to be routed between ground-based gateways and space-based satellites, as well as between satellites, which existing technologies struggle to efficiently address, particularly in terms of cost and complexity.
Innovation Solution
The use of optical components to transmit and receive signals between ground-based gateways and satellites, enabling the production of optical inter-satellite link (ISL) beams and RF service downlink beams without the need for onboard demodulation and remodulation, simplifying satellite payload design and reducing mass, power, and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If optical components are used to transmit and receive signals between ground-based gateways and satellites, then device complexity is reduced and mass is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent extracts the demodulation and remodulation functions from the satellite payload, eliminating the need for complex onboard signal processing equipment. The satellite simply receives optical uplink signals and transmits optical downlink signals without processing the modulated content, significantly reducing device complexity while maintaining functional capability through ground-based processing.
Solution Approach 2:
The optical transceiver system performs multiple functions: receiving optical feeder uplink beams, generating optical inter-satellite link beams, and producing RF service downlink beams, all without requiring separate demodulation and remodulation subsystems. This multi-functionality reduces overall system complexity while maintaining precision through integrated optical processing.
2Weight of moving object
If optical components are used for signal transmission, then mass is reduced and power consumption is reduced, but ease of manufacture deteriorates
Solution Approach 1:
The patent removes heavy and power-intensive demodulation and remodulation equipment from the satellite, replacing it with a simpler optical transceiver system that directly converts optical uplink signals to optical downlink signals. This extraction of complex processing functions significantly reduces satellite mass and power requirements while the modular optical design facilitates manufacturing.
Solution Approach 2:
The patent replaces traditional RF electronic signal processing systems with optical systems, substituting heavy electronic components with lighter optical components. This substitution reduces satellite mass and power consumption while the成熟 optical manufacturing processes improve ease of manufacture despite initial integration challenges.
3Use of energy by moving object
If optical components are used for signal transmission, then power consumption is reduced, but ease of operation deteriorates
Solution Approach 1:
The optical transceiver system incorporates self-alignment capabilities where the satellite automatically tracks and maintains optimal beam pointing using feedback from the received optical uplink signals. This self-service alignment mechanism reduces power consumption compared to active tracking systems while maintaining ease of operation through automated correction of beam pointing errors.
Solution Approach 2:
The system uses feedback from the received optical feeder uplink beam to automatically adjust the pointing and orientation of the optical downlink beam. This feedback mechanism ensures continuous optimal alignment between ground station and satellite, making the system easy to operate despite the inherent difficulty of optical beam alignment in space.
4Device complexity
If frequency conversion is eliminated on the satellite, then device complexity is reduced and cost is reduced, but adaptability deteriorates
Solution Approach 1:
The optical transceiver system provides universal functionality across multiple frequency bands by performing all frequency conversion operations at the ground station. The satellite's optical system can handle any frequency band that the ground-based optical-to-RF conversion equipment supports, providing adaptability without requiring complex onboard frequency conversion capabilities.
Solution Approach 2:
The ground-based optical-to-RF conversion equipment acts as an intermediary that handles all frequency adaptation requirements. This external mediator provides the necessary frequency band flexibility and adaptability that would otherwise require complex onboard equipment, allowing the satellite to maintain simple optics while still supporting multiple frequency bands through ground-based processing.
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 approach allows for high-throughput satellite communications with significant cost savings by reducing the number of ground-based gateways and simplifying satellite equipment, enabling efficient data transmission and reception without the need for frequency conversion on the satellite.
Implementation Method 1
configured to receive the optical feeder uplink beam
Implementation Method 2
produce and transmit an optical inter-satellite link (ISL) beam and an RF service downlink beam
Data Source
AI summary
Described herein is a space based subsystem of a satellite, and methods for use therewith, for producing and transmitting an optical ISL beam to another satellite. The subsystem can include, inter alia, receiver optics, optical amplifiers, a WDM demultiplexer, beam splitters, a WDM multiplexer, and transmitter optics. The transmitter optics may be configured to receive an amplified wavelength division multiplexed optical signal and, in dependence thereon, transmit an optical ISL beam to another satellite. In certain embodiments, because RF frequencies of a wavelength division multiplexed optical signal produced by the WDM multiplexer are within a same specified RF frequency range within which the other satellite is configured to transmit RF service downlink beams, there is an elimination of any need for the other satellite to perform any frequency conversions when producing the RF service downlink beams in dependence on the optical ISL beam.