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Related Experiment Video

Updated: Feb 11, 2026

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

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Spatial hole burning in thin-disk lasers and twisted-mode operation.

K Schuhmann, K Kirch, F Nez

|May 2, 2018

Summary

Spatial hole burning hinders single-frequency operation in thin-disk lasers. A novel twisted-mode scheme effectively suppresses this effect, enabling efficient single-frequency laser output.

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Last Updated: Feb 11, 2026

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

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Published on: July 12, 2017

Area of Science:

Laser Physics
Optical Engineering

Background:

Spatial hole burning is a key obstacle to single-frequency operation in thin-disk lasers.
The configuration of the thin disk (end mirror vs. folding mirror) significantly impacts saturation effects.

Purpose of the Study:

To evaluate saturation effects in thin-disk lasers for both end mirror and folding mirror configurations.
To identify and address the primary causes of spatial hole burning.
To develop a method for achieving efficient single-frequency operation.

Main Methods:

Analysis of spatial hole burning and saturation effects in thin-disk laser configurations.
Implementation of a twisted-mode scheme using a multi-order quarter-wave plate and a polarizer.

Main Results:

Demonstrated that spatial hole burning is a critical issue, particularly when the disk acts as a folding mirror.
Showcased the effectiveness of the twisted-mode scheme in suppressing spatial hole burning.
Observed enhanced wavelength selectivity leading to efficient single-frequency operation.

Conclusions:

The twisted-mode scheme effectively overcomes spatial hole burning in thin-disk lasers.
This method facilitates robust single-frequency operation, crucial for various laser applications.
Optimizing disk placement and employing advanced optical schemes are vital for laser performance.