Optical Receptacle Light Splitting Ratio Stability
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Solution Overview
Problem
The optical module disclosed in PTL 1 experiences significant variation in light splitting ratio between signal and monitor light due to poor positional accuracy of the reflection part in the optical receptacle, leading to increased production costs.
Innovation Solution
An optical receptacle with a light separation part that includes an inclined reflection part and a second transmission part, both located within an optical effective region, to separate light into signal and monitor light paths, reducing the required positional accuracy of the reflection part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the positional accuracy of the reflection part is increased to reduce variation in light splitting ratio, then the light splitting ratio stability is improved, but the manufacturing cost increases
Solution Approach 1:
The light separation part is divided into multiple functional regions: a first light separation region with a first reflection part for separating signal light, and a second light separation region with a second reflection part for separating monitor light. This segmentation allows each region to independently handle light separation, reducing the impact of positional deviations on overall performance and lowering manufacturing precision requirements.
Solution Approach 2:
The patent changes the structural parameters of the light separation part by introducing multiple reflection parts with different orientations and positions. The first reflection part has a first inclination angle while the second reflection part has a second inclination angle, creating a more robust light separation system that is less sensitive to manufacturing variations.
2Reliability
If the positional accuracy of the reflection part is increased to reduce variation in light splitting ratio, then the light splitting ratio stability is improved, but the device complexity increases
Solution Approach 1:
The light separation part is integrated directly into the optical receptacle body as a unified structure. The multiple reflection parts are formed within the same component, combining the functions of light separation and structural support into a single element, thereby reducing overall device complexity despite the enhanced light separation capability.
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 receptacle effectively reduces variation in light splitting ratio between signal and monitor light, easing the positional accuracy requirements of the reflection part and lowering production costs.
Implementation Method 1
a reflection part that is an inclined surface inclined to an optical axis of the light entered from the first optical surface, the reflection part being configured to reflect, toward the third optical surface as the monitor light, a part of light impinging on the light separation part
Implementation Method 2
a first transmission part configured to allow, to pass through the first transmission part as signal light travelling toward the end surface of the optical transmission member, a part of light entered from the first optical surface
Data Source
AI summary
An optical receptacle comprises: a first optical surface; a first transmission part; a light separation unit; and a third optical surface. The light separation unit includes a reflective part and a second transmission part. Given that the optical axis of light which is incident on the first optical surface and exits the second optical surface is defined as a center axis and that an area that has an outer peripheral surface the same distance away from the center axis as the radius of the first optical surface or the second optical surface, whichever is greater, is defined as an optical effective area, the first transmission part and the second transmission part are located within the optical effective area.