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Design, implementation, and characterization of a folded spot-array generator for a modulator-based free-space
Frédéric Thomas-Dupuis1, Marc Châteauneuf, Andrew G Kirk
1Department of Electrical and Computer Engineering, McGill University, Montréal, Québec H3A 2A7, Canada. fredd@photonics.ece.mcgill.ca
Applied Optics
|October 7, 2003
Summary
A novel folded structured light generator creates dense spot arrays for optical interconnects. This compact design uses fewer optical surfaces, improving efficiency and reducing size compared to previous methods.
Area of Science:
- Optics and Photonics
- Optical Engineering
- Free-space Optics
Background:
- Free-space optical interconnects require efficient light generation and manipulation.
- Existing spot-array generators can be bulky and optically complex.
Purpose of the Study:
- To present a compact, folded structured light generator for modulator-based free-space optical interconnects.
- To demonstrate a design that reduces the number of optical surfaces and improves compactness.
Main Methods:
- Utilized three cascaded diffractive optical elements to generate spot arrays.
- Employed a folded optical configuration for compactness.
- Detailed optical design, sensitivity analysis, alignment, assembly, and testing.
Main Results:
- Successfully produced 4x8 clusters of spots, with each cluster containing a 4x4 array of 13.1-microm-radius spots on a 90-microm pitch.
- The folded design is more compact than linear generators.
- Reduced the number of optical surfaces from 14 to eight.
Conclusions:
- The folded structured light generator offers a compact and efficient solution for optical interconnects.
- The design demonstrates feasibility through detailed analysis and testing.
- This approach advances the development of miniaturized optical systems.