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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Quasi monolithic fiber collimators.

Jonathan Joseph Carter, Steffen Böhme, Kevin Weber

|March 17, 2026

Summary

This summary is machine-generated.

Engineers developed a simplified fiber collimator to improve laser beam stability in space interferometry. This new design reduces bonding complexity and offers performance comparable to commercial alternatives for sensitive experiments.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Interferometric displacement measurements in space applications are hindered by thermal expansion.
Existing fiber collimators require complex assembly with tight tolerances.

Purpose of the Study:

To present a simplified quasi-monolithic fiber collimator design.
To reduce complexity and improve the reliability of fiber-to-free-beam interfaces.

Main Methods:

Developed a quasi-monolithic fiber collimator integrating fiber alignment and welding.
Tested the generated light field, Gaussian beam profile, and beam-pointing stability.

Main Results:

The novel fiber collimator achieved a well-collimated laser beam.
Performance metrics, including beam profile and pointing stability, were validated.
The quasi-monolithic design demonstrated performance on par with commercial fiber collimators.

Conclusions:

The quasi-monolithic fiber collimator offers a simplified and effective solution for laser beam conversion.
This design is suitable for experiments requiring high stability and reduced thermal drift.
It presents a promising, easy-to-implement alternative for free-beam and fiber-coupled laser systems.