10 kW peak power, single-frequency 1553 nm nanosecond pulsed fiber laser for time-of-flight LIDAR

Zhang, Zhitao; Li, Zheng; Yu, Hanghang; Xuan, Hongwen

doi:10.35848/1882-0786/acb758

Cited by 2 publications

(1 citation statement)

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“…Note that the switch signal of the semiconductor optical amplifier is also provided by the same DG645, ensuring that the pulse train is synchronized with that of the 258 nm laser. More details of this 1553 nm fiber laser system can be found in our previous paper 29 …”

Section: Methodsmentioning

confidence: 99%

High-power, narrow linewidth solid-state deep ultraviolet laser generation at 193 nm by frequency mixing in LBO crystals

Zhang,

Yu,

Chen

et al. 2024

Adv. Photon. Nexus

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A 60-mW solid-state deep ultraviolet (DUV) laser at 193 nm with narrow linewidth is obtained with two stages of sum frequency generation in LBO crystals. The pump lasers, at 258 and 1553 nm, are derived from a homemade Yb-hybrid laser employing fourth-harmonic generation and Er-doped fiber laser, respectively. The Yb-hybrid laser, finally, is power scaling by a 2 mm × 2 mm × 30 mm Yb:YAG bulk crystal. Accompanied by the generated 220-mW DUV laser at 221 nm, the 193-nm laser delivers an average power of 60 mW with a pulse duration of 4.6 ns, a repetition rate of 6 kHz, and a linewidth of ∼640 MHz. To the best of our knowledge, this is the highest power of 193-and 221-nm laser generated by an LBO crystal ever reported as well as the narrowest linewidth of 193-nm laser by it. Remarkably, the conversion efficiency reaches 27% for 221 to 193 nm and 3% for 258 to 193 nm, which are the highest efficiency values reported to date. We demonstrate the huge potential of LBO crystals for producing hundreds of milliwatt or even watt level 193-nm laser, which also paves a brand-new way to generate other DUV laser wavelengths.

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Section: Methodsmentioning

confidence: 99%