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Related Experiment Video

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Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

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Micro-optical bench for alignment-free optical coupling.

Y Aoki¹, T Kato, R Jun Mizuno

¹Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.

|February 29, 2008

Summary

This summary is machine-generated.

We developed a micro-optical bench for passive alignment of optical components. This silicon-based module achieves low coupling loss (<3 dB) for fiber optics without precise alignment.

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Area of Science:

Optoelectronics
Photonics
Materials Science

Background:

Passive alignment is crucial for cost-effective optical systems.
Current alignment methods often require active adjustments, increasing complexity and cost.
Miniaturization in optical systems demands integrated alignment solutions.

Purpose of the Study:

To introduce a novel micro-optical bench for passive alignment.
To demonstrate a method for precise positioning of optical elements using a silicon substrate.
To evaluate the optical coupling efficiency and alignment accuracy of the proposed module.

Main Methods:

Designed a micro-optical bench using a silicon substrate with integrated reference planes and V-grooves.
Utilized these features for passive positioning of a planar microlens array, semiconductor device submounts, and optical fibers.
Fabricated a prototype and measured optical coupling loss and channel-to-channel deviation.

Main Results:

Achieved an overall optical coupling loss of less than 3 dB.
Demonstrated low channel-to-channel deviation, as low as 1 dB, without active alignment.
Obtained a coupling loss of approximately 0.5 dB for multimode fibers.

Conclusions:

The micro-optical bench enables efficient passive alignment of optical components.
The silicon-based design offers a cost-effective solution for miniaturized optical systems.
The achieved low coupling losses highlight the module's practical applicability in photonics.