Journal of Infrared Millimeter and Terahertz Waves· 2026Q2
Intracavity THz Generation Using a Thin Lithium Niobate Plate in a Compact Kerr-Lens Mode-Locked Yb:CALGO Bulk Oscillator
- 0citations
- Q2SCImago
- 2026year
Short summary
A compact Yb:CALGO laser generates single-cycle THz pulses up to 3 THz with 120 µW average power by using a 50-µm lithium niobate plate for optical rectification.
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Key points
- Generated single-cycle THz pulses up to 3 THz using optical rectification in a 50-µm lithium niobate plate.
- Achieved 120 µW of average THz power within a compact, diode-pumped Kerr-lens mode-locked Yb:CALGO laser oscillator.
- The laser delivered 83-fs pulses with up to 71 W of average intracavity power from 21.4 W of pump power.
- Detected THz pulses with 60-dB dynamic range using electro-optic sampling.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract We demonstrate intracavity terahertz (THz) generation via optical rectification in a 50-µm-thick lithium niobate crystal placed inside a compact diode-pumped Kerr-lens mode-locked (KLM) Yb:CALGO bulk oscillator. The oscillator operates at a repetition rate of 85 MHz and delivers 83-fs pulses with up to 71 W of average intracavity power, obtained with only 21.4 W of low-cost multimode diode pump power. We generate single-cycle THz pulses with a spectrum extending up to 3 THz, detected by electro-optic sampling with 60-dB dynamic range within 156 s of measurement time (313 averaged traces) and up to 120 µW of THz average power. This work combines the high damage threshold, power-handling capability, and cost-effectiveness of thin-LN plates with simplicity, compactness, and low-cost multimode diode-pumped solid-state bulk lasers, offering an attractive alternative for high-repetition-rate THz time-domain spectroscopy systems.
The authors' abstract, as published at the source. Journal of Infrared Millimeter and Terahertz Waves, 2026 · DOI ↗
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Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering