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Related Experiment Video

Updated: Jun 23, 2026

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

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

Published on: July 12, 2017

Diode-pumped 99 fs Yb:CaF2 oscillator.

F Friebel¹, F Druon, J Boudeile

¹Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Université Paris-Sud, RD 128 91127 Palaiseau, France.

|May 5, 2009

Summary

Researchers generated ultrashort laser pulses using a Ytterbium-doped Calcium Fluoride (Yb:CaF2) crystal. This mode-locked laser oscillator produced 99 femtosecond pulses with 380 mW average power.

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Last Updated: Jun 23, 2026

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Area of Science:

Laser physics
Materials science

Background:

Mode-locked lasers are crucial for scientific research, requiring stable, ultrashort pulse generation.
Ytterbium-doped crystals offer potential for generating specific laser wavelengths and pulse durations.

Purpose of the Study:

To demonstrate ultrashort pulse generation from a novel Yb:CaF2 laser oscillator.
To characterize the performance and stability of the mode-locking regime.

Main Methods:

Utilized a Yb:CaF2 crystal in a mode-locked laser oscillator configuration.
Employed a saturable absorber mirror and Kerr lens effect for short-pulse generation and stabilization.
Investigated the operational limits and stability of the laser system.

Main Results:

Successfully generated laser pulses with a duration of 99 femtoseconds (fs).
Achieved an average output power of 380 milliwatts (mW).
Observed a spectral bandwidth of 13 nm centered at 1053 nm.
Identified a regime with slow oscillations between mode-locking and Q-switching.

Conclusions:

The Yb:CaF2 crystal is suitable for generating ultrashort, high-power laser pulses.
Saturable absorber mirror and Kerr lens effect effectively stabilize mode-locking.
Further investigation is needed to fully understand and mitigate the observed Q-switching instabilities.