Optical Module Antireflection Lens and Conductive Gasket
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Solution Overview
Problem
The increasing demand for optical modules in fiber-to-the-home deployments necessitates cost-effective solutions while maintaining high sensitivity and long-distance data transmission capabilities, which existing technologies have not adequately addressed.
Innovation Solution
An optical module comprising a master control chip, a laser receiver with a PIN photodiode and high gain trans-impedance amplifier, and an antireflection-coated lens, integrated with a conductive gasket for improved ground noise reduction and sensitivity, facilitating high data rate transmission over long distances in gigabit capable passive optical networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a laser receiver with high gain trans-impedance amplifier is used, then sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent combines the PIN photodiode, trans-impedance amplifier, lens, and shell into an integrated laser receiver module. This merging of components achieves high sensitivity through the high gain TIA while managing device complexity through modular integration, where the TIA is directly coupled to the photodiode within a unified structure.
Solution Approach 2:
The laser receiver module serves multiple functions: optical signal detection via the PIN photodiode, signal amplification through the high gain TIA, optical focusing via the lens, and mechanical protection through the shell. This multi-functionality allows the single module to achieve high sensitivity without proportionally increasing overall device complexity.
2Use of energy by moving object
If an antireflection film is coated on the lens, then light transmission is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies an antireflection film with specific optical parameters (refractive index and thickness) to the lens surface. By optimizing these parameters, the film reduces reflections and enhances light transmission. The manufacturing precision requirement is managed by using standard antireflection coating techniques rather than requiring custom precision optics.
3Measurement precision
If a conductive gasket is added for ground noise reduction, then sensitivity is improved, but device complexity increases
Solution Approach 1:
The conductive gasket acts as an intermediary element between the laser receiver module and the housing. It provides a reliable ground connection that shields the sensitive optical detection circuitry from ground noise. The gasket integrates seamlessly into the existing structure, improving sensitivity without significantly increasing device complexity.
4Productivity
If fiber to the home deployment scale is increased, then network resources are improved, but cost control becomes more difficult
Solution Approach 1:
The optical module is segmented into distinct functional components (PIN photodiode, TIA, lens, shell, conductive gasket) that can be manufactured and assembled using standardized processes. This segmentation enables cost control through efficient manufacturing of individual components and modular assembly, supporting large-scale FTTH deployments while maintaining cost-effectiveness.
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 optical module achieves high sensitivity and long-distance data transmission in GPONs while lowering costs, with the antireflection film enhancing light transmission and the conductive gasket minimizing ground noise interference.
Implementation Method 1
the lens being coated with an antireflection film
Implementation Method 2
a PIN photodiode, a trans-impedance amplifier
Implementation Method 3
a trans-impedance amplifier
Implementation Method 4
integrated with a conductive gasket for improved ground noise reduction
Data Source
AI summary
Some embodiments of the present application provide an optical module, including: a master control chip and a laser receiver; the laser receiver being connected to the master control chip; where the laser receiver includes: a PIN photodiode, a trans-impedance amplifier, a lens, and a shell; the PIN photodiode being electrically connected to the trans-impedance amplifier; and the lens being coated with an antireflection film; where the optical module further includes a bracket and a claw, where the laser receiver is fixed between a housing of the optical module and the bracket by the claw.