Parallel Optical Fiber Angled Coupling Component with Metal Reflective Film
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Solution Overview
Problem
Existing parallel optical fiber angled coupling components face limitations due to high inter-modal dispersion, which restricts the transmission distance of optical signals and is exacerbated by the use of adhesive glue that reduces reflectivity on the bevel of the optical fiber, leading to communication errors and reduced signal integrity.
Innovation Solution
The end face of the optical fiber is polished at a bevel inclination of 42.5° or 47.5° and coated with a metal reflective film to reduce inter-modal dispersion and maintain high reflectivity even when covered with glue, allowing for increased transmission distance and improved signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the end face of the optical fiber is polished into a bevel with an inclination of 45° and no reflective film is coated, then the structure is simple and manufacturing is easy, but the reflectivity drops sharply when adhesive glue covers the bevel, resulting in high inter-modal dispersion and limited transmission distance
Solution Approach 1:
The patent applies preliminary action by coating the bevel surface with a metal reflective film before the adhesive glue is applied. This pre-coating ensures that the reflective surface is protected and will maintain high reflectivity even after glue coverage, preventing the deterioration of optical signal quality that would otherwise occur.
Solution Approach 2:
The patent uses composite materials by combining the metal reflective film coating with the optical fiber bevel surface. This composite structure provides both the optical reflection function and resistance to adhesive glue coverage, solving the problem of reflectivity loss while maintaining structural integrity.
2Device complexity
If the bevel inclination is 45° with no reflective film, then the device complexity is low, but the transmission distance is restricted due to high inter-modal dispersion
Solution Approach 1:
The metal reflective film is applied in advance to the bevel surface before assembly, ensuring that the optical coupling efficiency is optimized from the beginning. This preliminary coating action reduces inter-modal dispersion and enables extended transmission distance without significantly increasing device complexity.
3Strength
If adhesive glue is used to cover the bevel, then the mechanical strength of the coupling structure is improved, but the reflectivity of the bevel drops sharply, causing communication errors
Solution Approach 1:
The metal reflective film is coated on the bevel surface before the adhesive glue is applied. This preliminary coating creates a protective reflective layer that prevents the glue from directly contacting and degrading the optical reflection surface, thereby maintaining both mechanical strength from the glue and optical reliability from the reflective film.
Solution Approach 2:
The patent creates a composite structure where the metal reflective film serves as a protective and functional layer over the optical fiber bevel. This composite approach allows the adhesive glue to provide mechanical bonding strength while the metal film maintains optical reflectivity, solving both structural and optical requirements simultaneously.
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 solution effectively reduces inter-modal dispersion and extends the transmission distance of optical signals while ensuring high reflectivity, even under conditions where the bevel is covered with glue, thereby enhancing the reliability and efficiency of optical fiber communication.
Implementation Method 1
the bevel of the optical fiber is coated with a metal reflective film, so as to ensure high reflectivity even if the bevel of the optical fiber is covered with glue
Implementation Method 2
The light wave of each guided mode has a different transmission speed in the optical fiber, resulting in inter-modal dispersion. The end face of the optical fiber is polished into a bevel with an inclination of 42.5° or 47.5° to reduce inter-modal dispersion
Data Source
AI summary
A parallel optical fiber angled coupling component, which is used for parallel coupling of optical signal between the optical fiber array and the laser array, comprises an optical fiber positioning substrate, a cover plate and a plurality of optical fibers. The end face of the optical fiber is polished into a bevel with an inclination of 42.5° or 47.5°, and the bevel of the optical fiber is coated with a metal reflective film. This invention has the following beneficial effects: The end face of the optical fiber is polished into a bevel with an inclination of 42.5° or 47.5° to reduce inter-modal dispersion and increase the transmission distance of the optical signal in the subsequent optical fiber; the bevel of the optical fiber is coated with a metal reflective film, so as to ensure high reflectivity even if the bevel of the optical fiber is covered with glue.