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Kerr-lens mode-locked, diode-pumped Yb,Gd:YAP laser generating 23 fs pulses.

Hai-Yu Nie, Peixiong Zhang, Pavel Loiko

|August 13, 2025

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Researchers developed a diode-pumped Ytterbium, Gadolinium-doped Yttrium Aluminum Perovskite (Yb,Gd:YAP) laser. This laser generates ultrashort optical pulses, achieving 23 fs, the shortest reported for Yb3+-doped perovskite crystals.

Area of Science:

Laser Physics
Materials Science

Background:

Diode-pumped solid-state lasers are crucial for various applications.
Ytterbium (Yb3+)-doped materials offer advantages for generating ultrashort pulses.
Perovskite-type crystals are emerging as promising laser gain media.

Purpose of the Study:

To investigate the potential of diode-pumped Yb,Gd:YAP lasers for ultrashort pulse generation.
To demonstrate Kerr-lens mode-locking in this specific laser system.
To characterize the performance of the generated ultrashort pulses.

Main Methods:

Utilized a diode-pumped Yb,Gd:YAP crystal as the gain medium.
Employed soft-aperture Kerr-lens mode-locking (KLM) technique.
Characterized pulse duration, average output power, and wavelength using optical diagnostics.

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Main Results:

Achieved soliton pulses as short as 23 femtoseconds (fs) at 1082.3 nm.
Obtained an average output power of 45 mW at 67.25 MHz repetition rate for the shortest pulses.
Demonstrated a maximum average output power of 101 mW at 1056.5 nm with 34 fs pulse duration and 38.9 kW peak power.

Conclusions:

This study presents the first Kerr-lens mode-locked operation in a diode-pumped Yb,Gd:YAP laser.
The achieved 23 fs pulse duration is the shortest ever reported for any Yb3+-doped perovskite-type crystal laser.
The results highlight the potential of Yb,Gd:YAP as a high-performance gain medium for ultrashort pulse generation.