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Updated: Jun 15, 2026
07:22
Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
Published on: February 3, 2023
Summary
Graded-index (GRIN) rod lenses efficiently couple multimode optical fibers. This study reveals GRIN lens systems are highly sensitive to angular misalignment but tolerate lateral errors and spacing variations well.
Area of Science:
- Optical Engineering
- Fiber Optics Communications
Background:
- Graded-index (GRIN) rod lenses are critical components for efficient optical fiber coupling.
- Applications span optical connectors, switches, multiplexers, and branch couplers.
Purpose of the Study:
- To analyze power losses in GRIN lens coupling systems.
- Investigate the impact of lateral and angular misalignments and lens spacing on coupling efficiency.
Main Methods:
- Theoretical analysis of power loss mechanisms in GRIN lens-based fiber optic systems.
- Modeling the effects of positional and angular deviations between lenses and fibers.
Main Results:
- GRIN lens coupling systems exhibit high sensitivity to angular misalignment.
- The systems demonstrate greater tolerance for lateral misalignments and variations in lens spacing.
Conclusions:
- Optimizing angular alignment is crucial for maximizing coupling efficiency in GRIN lens systems.
- GRIN lens couplers offer robustness against certain types of fabrication and assembly errors.
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