Optical Receiver Wavelength Splitting for Multi-Speed Signal Detection
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Solution Overview
Problem
Existing optical signal receiving architectures, such as SOA+BPF+PD, struggle to simultaneously support optical signals at different speeds like 50 G, 12.5 G, and 25 G due to mismatched wavelength ranges, leading to compatibility issues and increased costs when using cooled transmitters to narrow wavelength ranges.
Innovation Solution
An optical signal receiving apparatus with a filter configured to perform wavelength division processing and narrowband filtering, allowing optical signals to be divided into different paths based on preset wavelength ranges, enabling compatible reception of signals at multiple speeds without the need for cooled transmitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a narrowband filter (BPF) is used in the SOA+BPF+PD receiver architecture, then the wavelength range can be narrowed to match high-speed signals, but it cannot compatibly support optical signals at different speeds (12.5G, 25G, 50G) due to wavelength mismatch with uncooled lasers
Solution Approach 1:
The patent divides the optical signal reception into multiple parallel channels, each with its own filter and detector configured for specific speed levels. The OLT includes multiple receiving modules that can simultaneously process different wavelength ranges corresponding to different speed levels (12.5G, 25G, 50G), allowing the system to segment the broad wavelength spectrum into manageable bands for each speed level.
Solution Approach 2:
The patent designs a universal receiver architecture that can handle multiple speed levels through configurable filter-detector pairs. Each receiving module is designed to be multi-functional, capable of adjusting its filter characteristics and detector settings to accommodate different speed levels and wavelength ranges, making the system adaptable to various signal types without requiring separate dedicated receivers for each speed level.
2Manufacturing precision
If cooled transmitters are used to narrow wavelength ranges to 4 nm, then wavelength matching can be achieved, but the manufacturing cost of terminal optical modules increases significantly
Solution Approach 1:
The patent replaces expensive cooled transmitters with uncooled lasers, which are cheaper and easier to manufacture. Although uncooled lasers have wider wavelength ranges, the system compensates by using multiple parallel receiving modules with configurable filters that can adapt to the broader wavelength spectrum, thereby reducing terminal optical module costs while maintaining reception capability across multiple speed levels.
Solution Approach 2:
The patent changes the operational parameters of the receiving modules, specifically adjusting filter characteristics (center wavelength, bandwidth) and detector settings dynamically to match the broader wavelength range of uncooled lasers. This parameter adjustment allows the system to maintain precise wavelength matching without requiring cooled transmitters, thus reducing manufacturing costs.
3Ease of manufacture
If uncooled lasers are used to transmit optical signals at different speeds, then manufacturing cost can be reduced, but the wavelength range becomes too wide to match with narrowband filters
Solution Approach 1:
The patent segments the broad wavelength range of uncooled lasers into multiple narrower bands, each handled by a separate receiving module with dedicated filters and detectors. This segmentation allows each module to operate with precise wavelength matching within its specific band, effectively managing the wide overall wavelength spectrum without requiring cooled transmitters.
Solution Approach 2:
The patent introduces dynamic configurability to the filter-detector pairs in each receiving module, allowing real-time adjustment of filter characteristics (center frequency, bandwidth) and detector parameters to optimize wavelength matching. This dynamic adaptation enables the system to handle the variable wavelength output of uncooled lasers across different speed levels while maintaining precise matching.
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 allows for the simultaneous reception of optical signals at different speeds without increasing the manufacturing cost of the terminal optical module, improving sensitivity and reducing hardware complexity by converting signals into electrical form using multiple detectors and preprocessing modules.
Implementation Method 1
an optical signal receiving apparatus, including: a filter and at least one detector; the filter is disposed following an amplifier
Implementation Method 2
filter characteristics of the filter are configured according to a preset wavelength range, and the filter is configured to filter out noise in optical signals amplified by the amplifier and perform wavelength division processing on the optical signals
Implementation Method 3
the at least one detector is configured to convert the at least one optical signal into an electrical signal
Data Source
AI summary
The present disclosure discloses an optical signal receiving apparatus, an optical line terminal, an optical signal receiving system, an optical signal receiving method, and a computer-readable storage medium. The optical signal receiving apparatus is configured to receive optical signals at multiple speeds, and includes: a filter and at least one detector; the filter is disposed following an amplifier, filter characteristics of the filter are configured according to a preset wavelength range, and the filter is configured to filter out noise in optical signals amplified by the amplifier and perform wavelength division processing on the optical signals to obtain at least one optical signal corresponding to the preset wavelength range; and the at least one detector is configured to convert the at least one optical signal into an electrical signal.