Centralized Base Laser Distribution for Remote Optical Modulation
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Solution Overview
Problem
Current optical interconnection systems face challenges in increasing data rates and reliability due to the high cost and limited lifespan of diode lasers, which are often required at both ends of the communication system.
Innovation Solution
The implementation of local and remote transceivers coupled with waveguides allows for the distribution of a base signal from a central location to remote transmitters, enabling remote modulation without the need for lasers at each transmitter, reducing complexity and cost while enhancing reliability through redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diode lasers are installed at both ends of the optical interconnection system, then reliable communication can be achieved, but system cost increases and device complexity increases
Solution Approach 1:
The patent extracts the laser function from the remote transmitter and relocates it to a central location. The base laser generates optical beams that are distributed through waveguides to multiple transmitters, which only perform modulation without requiring their own lasers. This eliminates the need for expensive laser diodes at each transmission point while maintaining communication reliability.
Solution Approach 2:
A single base laser serves multiple transmitters simultaneously by distributing its optical beam through waveguide networks. The base laser performs the function of what would otherwise be multiple separate laser diodes, reducing overall system complexity and cost while providing universal service to multiple transmission points.
2Ease of manufacture
If diode lasers are used in transmitters, then optical beam generation is achieved, but system cost increases due to the high cost of laser diodes
Solution Approach 1:
The laser generation function is extracted from the transmitter assembly and placed at a separate central location. Transmitters are simplified to contain only modulation components that work with incoming optical beams from the base laser, making them cheaper and easier to manufacture without laser diodes.
Solution Approach 2:
Instead of having each transmitter contain its own expensive laser diode, the patent uses a single base laser whose optical beam is copied and distributed through waveguides to multiple transmitters. This optical copying approach eliminates the need for multiple expensive laser components while maintaining full functionality.
3Adaptability or versatility
If modulation formats and rates are built into laser diode modules, then standardized optical interconnections are achieved, but adaptability to increase data rates is limited
Solution Approach 1:
The system separates the static base laser from the dynamic modulation function. Since modulation parameters are not built into fixed modules but rather applied dynamically at the transmitter using distributed optical beams, data rates and modulation formats can be adjusted flexibly without replacing entire laser modules, enhancing adaptability.
Solution Approach 2:
The system segments the laser function from the modulation function. The base laser operates independently at a central location, while modulation is performed separately at remote transmitters. This segmentation allows independent optimization and flexible adjustment of data rates without being constrained by integrated laser-diode-module designs.
4Duration of action of stationary object
If diode lasers are used at remote transmitters, then optical transmission is enabled, but laser lifetime is shorter than desirable and replacement is required
Solution Approach 1:
By extracting the laser from the remote transmitter and placing it at a central location, the system eliminates the need for short-lived laser diodes at distributed points. The centralized base laser can be maintained in a controlled environment, extending its operational lifetime and eliminating frequent replacements at remote sites.
Solution Approach 2:
The centralized base laser serves all transmitters simultaneously, providing a long-lived optical source that eliminates the need for multiple short-lived laser diodes distributed throughout the system. This self-service approach extends overall system lifetime without requiring maintenance at remote locations.
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 reduces the overall system cost and complexity, increases reliability by eliminating the need for diode lasers at remote transmitters, and improves serviceability by allowing for redundant base signal generators, thereby supporting higher data rates and longer system availability.
Implementation Method 1
a waveguide that transmits a base signal from a base transmitter to a remote transmitter
Implementation Method 2
a modulator that modulates a base signal to produce a modulated optical signal
Implementation Method 3
a photodetector that converts the modulated optical signal to an electrical signal
Data Source
AI summary
Communication systems include network nodes that distribute an electrical or optical base signal to remote nodes for modulation at the remotes nodes. A first waveguide is coupled to transmit data to a corresponding remote node, a second waveguide is coupled to receive remotely modulated data from the remote node, and a third waveguide is coupled to deliver the base signal to the remote node. Typically, the base signal is an optical signal from a laser diode, and optical fibers communicate modulated data signals and the base signal. A portion of the base signal can also be modulated for communication with remote nodes.