研究目的
Investigating the anomalous passive Q-switching behavior induced by Cr4+:YAG in a compact Yb:KLu(WO4)2 laser, achieving stable passively Q-switched operation at repetition rates approaching up to 1 MHz.
研究成果
Anomalous passive Q-switching action induced by a Cr4+:YAG saturable absorber was demonstrated in a compact Yb:KLuW laser, achieving stable operation at a repetition rate as high as 0.97 MHz. The performance shows a close similarity to Yb-ion lasers passively Q-switched by 'fast' 2D saturable absorbers.
研究不足
Stable passively Q-switched operation could only be realized under high output couplings of T ? 80%, and the Cr4+:YAG saturable absorber could only be partially bleached.
1：Experimental Design and Method Selection:
A
2：5 mm long plane-parallel resonator was used with a Yb:
KLuW crystal and a Cr4+:YAG crystal plate as saturable absorber.
3：Sample Selection and Data Sources:
The Yb:KLuW crystal was 2 mm long with a Yb-ion concentration of
4：5 × 1020 cm?The Cr4+:
YAG crystal plate had an initial transmission of
5：3%. List of Experimental Equipment and Materials:
Fiber-coupler diode laser emitting at 975 nm, thermal-electric coolers, re-imaging unit.
6：Experimental Procedures and Operational Workflow:
The Yb:KLuW crystal was cooled to 15 °C, and the pump beam was focused onto the crystal.
7：Data Analysis Methods:
The average output power, pulse repetition rate, pulse energy, duration, and peak power were measured and analyzed.
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