Quad-port optical module bidirectional signal routing
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Solution Overview
Problem
Conventional optical communication systems lack the capability to efficiently manage bidirectional transmission of both digital and analog signals over a single fiber network, limiting their flexibility and ability to converge digital and analog services.
Innovation Solution
A quad-port optical module with pass-through capability, utilizing filters to route multiple wavelengths, allowing digital and analog signals to be transmitted bidirectionally while enabling add-drop functionality, thereby facilitating hybrid data services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional optical devices use dedicated unidirectional ports for transmission and reception, then signal routing is simplified, but the device lacks bidirectional transmission capability and service convergence flexibility
Solution Approach 1:
The optical device is designed with universal ports that can handle both transmission and reception functions. The same optical port and associated components can process signals in both upstream and downstream directions, eliminating the need for separate dedicated transmit and receive ports. This multi-functionality enables bidirectional communication while maintaining simplified signal routing.
Solution Approach 2:
The device segments optical signals by wavelength using filters. Different wavelength channels are separated and routed to appropriate receivers or transmitters, allowing bidirectional communication on the same fiber. The segmentation of signal processing paths by wavelength enables complex service convergence without increasing physical port complexity.
2Adaptability or versatility
If separate fiber networks are constructed for digital and analog services, then service isolation is maintained, but network flexibility and service convergence are limited
Solution Approach 1:
The optical device merges digital and analog service handling capabilities into a single integrated platform. By using wavelength-division multiplexing and filtering, the device can process both digital signals (from laser diodes) and analog signals (from photodiodes) over the same fiber infrastructure, enabling service convergence while maintaining signal integrity through wavelength separation.
Solution Approach 2:
Optical filters act as intermediaries that separate and route different wavelength signals to appropriate processing paths. This intermediary mechanism enables the coexistence of digital and analog services on the same network infrastructure by directing specific wavelengths to dedicated receivers or transmitters, facilitating service convergence without signal interference.
3Productivity
If single-wavelength optical signals are transmitted, then transmission simplicity is maintained, but the network cannot support multiple services simultaneously
Solution Approach 1:
The device adds the wavelength dimension to signal transmission by implementing wavelength-division multiplexing. Multiple optical signals with different wavelengths can coexist on the same fiber, allowing the network to support multiple services simultaneously. Each wavelength channel can carry different types of traffic (digital or analog) without interfering with others, maintaining transmission efficiency while expanding service capacity.
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
Enables flexible bidirectional communication of digital and analog signals, enhancing network flexibility and allowing service providers to offer a range of services without requiring extensive reconfiguration, by allowing specific wavelengths to pass-through without reflection while others are terminated or converted.
Implementation Method 1
a first filter operatively coupled between the first and second I/O ports, for allowing the first optical signal to pass-through substantially without reflection to the second I/O port, and for reflecting the second optical signal
Implementation Method 2
a receiver (e.g., photodiode or other suitable light detector) for converting the reflected second optical signal to a first electrical signal
Implementation Method 3
a transmitter (e.g., laser diode or other suitable light source) for generating a fourth optical signal having a fourth wavelength based on the second electrical signal
Implementation Method 4
wherein the fourth optical signal reflects off the first filter and is provided to the first I/O port
Implementation Method 5
a second filter operatively coupled between the first filter and the transmitter, for allowing the fourth optical signal to pass-through substantially without reflection to the first filter, and for reflecting the second optical signal reflected from the first filter toward the receiver
Implementation Method 6
A third filter may be operatively coupled between the second filter and the receiver, for allowing the second optical signal to pass-through substantially without reflection to the receiver, and for rejecting undesired signals
Data Source
AI summary
Techniques are disclosed for providing bi-directional data services involving a plurality of wavelengths. The data services may be hybrid in nature, including both digital and analog data signals. The techniques may be implemented, for instance, in an optical module, and allow one or more wavelengths to pass-through while other wavelengths are terminated or otherwise diverted. In one example embodiment, the techniques are embodied in a quad-port optical module having two input/output (I/O) ports and pass-through capability for at least one of the wavelengths, add capability for at least one wavelength, and drop capability for at least one wavelength. The module may further include transmit and/or receive capability for one or more signal types. The module can be operatively coupled with a bidi device or other suitable transceiver, to provide modular transmit-receive capability for a desired signal type.