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48 W, 5 ps, 100 kHz Ho:YLF CPA system and its application to mid-infrared ZGP OPG/OPA
Optics Letters
|June 15, 2026
Summary
We developed a high-power Holmium:YLF (Ho:YLF) chirped-pulse amplification (CPA) system to drive a zinc germanium phosphide (ZGP) optical parametric generator and amplifier (OPG/OPA), achieving tunable mid-infrared output.
Area of Science:
- Laser Physics
- Nonlinear Optics
- Materials Science
Background:
- High-power, tunable mid-infrared (MIR) sources are crucial for various scientific applications.
- Previous limitations in power and tunability hindered advancements in MIR spectroscopy and other fields.
Purpose of the Study:
- To report a high-power, high-repetition-rate Ho:YLF chirped-pulse amplification (CPA) system.
- To utilize this system to pump a ZnGeP2 (ZGP) optical parametric generator and amplifier (OPG/OPA).
- To achieve tunable MIR output with high average power.
Main Methods:
- A Ho:YLF CPA system was operated at 100 kHz repetition rate.
- The system delivered 48.1 W of average power at 2050.8 nm with 5.0 ps pulse width.
- This output pumped a ZGP OPG/OPA system.
Main Results:
- The ZGP OPG/OPA generated 2.7 W of signal light at 3402.1 nm and 0.64 W of idler light at 5160.3 nm.
- Both signal and idler pulses had a pulse width of 2.5 ps.
- Continuous wavelength tuning was achieved: 3051.2–3900.2 nm (signal) and 4205.1–5160.3 nm (idler).
Conclusions:
- The developed Ho:YLF CPA system effectively pumps a ZGP OPG/OPA.
- This approach provides a high-power, tunable source in the mid-infrared region.
- The system demonstrates significant potential for applications requiring MIR light.
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