Enhanced terahertz-wave parametric generation and oscillation in lithium niobate waveguides at terahertz frequencies

A. C. Chiang; T. D. Wang; Y. Y. Lin; S. T. Lin; H. H. Lee; Y. C. Huang; Y. H. Chen

doi:10.1364/OL.30.003392

Optics Letters
Vol. 30,
Issue 24,
pp. 3392-3394
(2005)
•https://doi.org/10.1364/OL.30.003392

Enhanced terahertz-wave parametric generation and oscillation in lithium niobate waveguides at terahertz frequencies

A. C. Chiang, T. D. Wang, Y. Y. Lin, S. T. Lin, H. H. Lee, Y. C. Huang, and Y. H. Chen

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A. C. Chiang, T. D. Wang, Y. Y. Lin, S. T. Lin, H. H. Lee, Y. C. Huang, and Y. H. Chen, "Enhanced terahertz-wave parametric generation and oscillation in lithium niobate waveguides at terahertz frequencies," Opt. Lett. 30, 3392-3394 (2005)

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Abstract

We observed parametric-generation efficiency of 1.61% from 1064 to $1071 nm$ and at $162 μ m$ in a $0.5 mm$ thick, $45 mm$ long z-cut congruent lithium niobate waveguide with a pump energy of $2.2 mJ$ and a pump pulse width of $5.8 ns$ . We also measured an ultralow-threshold intensity of $70 MW ∕ {cm}^{2}$ for a $1064 nm$ pumped parametric oscillator resonating at $1071 nm$ and emitting at $162 μ m$ with a $1 mm$ thick, $45 mm$ long lithium niobate waveguide.

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Waveguide Thickness (mm)	Signal Pulse Width (ns)	Signal Pulse Energy ( $μ J$ )	Conversion Efficiency (%)	Signal Spectral Width (nm FWHM)
0.5	2.8	32.8	1.61	1
0.78	3.2	26.6	1.31	0.85
1	4.0	15.0	0.75	0.7

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Optics Letters