Fiber optic transmission and reception module
The optical transmission and reception module addresses size and cost issues by integrating a dichroic filter within a single optical fiber, ensuring efficient and compact optical coupling without additional components, suitable for aeronautical applications.
FR3171096A1Pending Publication Date: 2026-07-10LATELEC
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- LATELEC
- Filing Date
- 2025-01-07
- Publication Date
- 2026-07-10
AI Technical Summary
Technical Problem
Optical transmission and reception modules in the aeronautical field face challenges related to cost, size, and maintenance due to the use of multiple optical components and bulky transceivers, which are not feasible in compact environments.
Method used
A compact optical transmission and reception module design utilizing a single optical fiber with a dichroic filter integrated into a common face, eliminating the need for additional optical components and ensuring efficient coupling of emission and reception beams through precise geometric configurations.
Benefits of technology
The module achieves efficient, compact, and cost-effective optical coupling with reduced size and complexity, enabling integration into small environments and minimizing maintenance requirements.
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Abstract
The invention relates to an optical transmitting and receiving module (100), comprising: an optical fiber (10), a substrate (50) for positioning said optical fiber, a light source (20), a photodetector (30), and an optical element (40). A first lateral face (55) of the substrate (50) and a first end face (14) of the optical fiber together form a common face. The optical element (40) has an entrance face (41) on which a dichroic filter (45) is deposited, said entrance face being arranged to be opposite the common face. The common face has two successive planar portions: a first planar portion (91) defining a plane having an angle β with respect to a plane (P) perpendicular to an optical axis of the optical fiber, and a second planar portion (92) defining a plane having an angle α with respect to said optical axis. Figure 1
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