Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Sinica

A STUDY OF 3S-4D TWO-PHOTON RESONANCE ENHANCED UV COHERENT RADIATION IN SODIUM VAPOUR

Yuying Zhang, Huang Xian-ling, Taoheng Sun, 北京大学物理系

Published Jan 1, 1989• 1 citation
Publisher

Abstract

Using the two-photon resonance enhanced SHRS, FWM and OPSE processes in sodium vapour, the two sets of the UV coherent radiation in 230 nm-340 nm have been observed, and the characteristics of these UV radiation are presented and discussed.
DOI
10.7498/aps.38.1945

Related papers

SPECTRAL CHARACTERISTICS OF UV COHERENT RADIATION GENERATED BY FOUR-WAVE PARAMETRIC PROCESS IN SODIUM VAPOUR

Zhao Lizeng, LEI ZI-MING, ZHANG XIU-LAN +9 more

UV coherent radiation at 327 nm, 328 nm, 330 nm and 333 nm is generated by four-wave parametric process in sodium vapour. The spectral characteristics is examined. The signal at 333 mn has narrower line width and wider tunable range. So it is possible to use it as a coherent UV source.

Acta Physica Sinica•Jan 1, 1985•0 citations

TUNABLE UV COHERENT RADIATION GENERATED BY 2-PHOTON HYBRIDRESONANCE IN Na_2-Na

Xiaoli An

The tunable UV coherent radiation in the wavelength regions of 337.66—339.41 nm and 358.04—359.59 nm generated by 2-photon hybrid resonance 4—wave mixing in sodium molecular and atomic systems has been first reported. The mechanism is carefully analyzed and the results are compared with the conventional 2-photon resonance 4-wave mixing effect in pure sodium atomic systems.

Science China Mathematics•Jan 1, 1987•0 citations

Tunable UV coherent radiation and infrared stimulated radiation generated by hybrid pumping in the Na2-Na system

Zugeng Wang, Xiaoling Tang, Kai-Chang Zhang +2 more

For the first time by means of two-photon hybrid excitation in the Na2-Na system, which is distinguished from the usual two-photon excitation in atomic vapor, tunable UV coherent radiation (between 337.6 and 339.1 nm and between 358.0 and 359.6 nm) and tunable infrared stimulated radiation (3.38-3.46 µm) were generated. By optically pumping with a pulsed dye laser scanning from 614.5 to 617.4 nm for sodium vapor in a heat-pipe oven, Na2 was excited by the first photon absorption from the X ′ Σ g + to the A ′ Σ u + state. The energy was transferred to Na by Na2*-Na collision to populate the levels 3p1/2,3/2 in Na, which was followed by another photon excitation from the same beam up to near the 5S level, resulting in SERS (3P1/2-4P and 3P3/2-4P) and OPSE(5S → 4P and 4P → 4S) radiation. Assuming the detunings of pumping frequency ω1, from ω(5S,3P3/2) and ω(5s,3p1/2) to be Δ1 and Δ2, respectively, the three UV coherent radiation components were supposed to be generated by the following mixing processes: ωUV = 2ω1 − ω(5S − 4P); ω U V ′ = 2 ω 1 − [ ω ( 5 S → 4 P ) + Δ 1 ] ; ω U V ′ ′ = 2 ω 1 − [ ω ( 5 S → 4 P ) + Δ 2 ] , and also ω U V ′ ′ ′ = 2 ω 1 − ω ( 4 P → 4 S ) . The SERS and the UV signals were tuned as the pumping wavelength was tuned. The measured wavelengths agreed well with the calculated values.

International Laser Science Conference•Jan 1, 1986•0 citations

TWO-PHOTON PUMPEL SIX-AND FOUR-WAVE MIXING AND STIMULATED RADIATION IN LITHIUM VAPOR

Zugeng Wang, 华东师范大学物理系,上海,200062

This paper reports the generation of the coherent and stimulated radiation in UV, visible and infrared regions by two-photon pumping. It includes the tunable coherent radiation around 1.03 μm generated by a special six-wave mixing process, the stimulated radiation at 812.6 nm generated by molecular two-photon dissociation or atomic cascade transition, coherent radiation at 323.3 nm and 670.8 nm generated by the four-wave mixings.

Acta Physica Sinica•Jan 1, 1990•0 citations

New process for generating broadly tunable UV coherent radiation: two-step hybrid resonance four-wave mixing in molecule-atom system

Shilan Deng, Lijuan Qin, H. Y. Jin +2 more

Tunable UV coherent radiation in the wavelength region 319.2 nm to approximately 354.2 nm has been generated by unequal-frequency hybrid resonance of Na2-Na system and followed four-wave mixing. The wave-mixing processes and experimental results are discussed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Oct 28, 1992•0 citations

Observation of the suppression of the stimulated hyper-Raman scattering (3S1/2-4P3/2) near the sodium 4D two-photon resonance

Mao-Hong Lu, Yumei Liu

The stimulated hyper-Raman scattering (SHRS) emissions associated with the excitation of the 4P 3/2 state in sodium vapour have been observed in both the forward and backward directions as the pumping laser was tuned near the 3S-4D two-photon resonance. The results show that though the forward SHRS process is greatly reduced by a destructive interference between it and the four-wave mixing (FWM) process induced by itself, the forward SHRS emission has a positive gain and can still be observed under a certain condition.

Journal of Physics B Atomic Molecular and Optical Physics•Oct 28, 1994•9 citations
For the first time by means of two-photon hybrid excitation in the Na2-Na system, which is distinguished from the usual two-photon excitation in atomic vapor, tunable UV coherent radiation (between 337.6 and 339.1 nm and between 358.0 and 359.6 nm) and tunable infrared stimulated radiation (3.38-3.46 µm) were generated. By optically pumping with a pulsed dye laser scanning from 614.5 to 617.4 nm for sodium vapor in a heat-pipe oven, Na2 was excited by the first photon absorption from the X ′ Σ g + to the A ′ Σ u + state. The energy was transferred to Na by Na2*-Na collision to populate the levels 3p1/2,3/2 in Na, which was followed by another photon excitation from the same beam up to near the 5S level, resulting in SERS (3P1/2-4P and 3P3/2-4P) and OPSE(5S → 4P and 4P → 4S) radiation. Assuming the detunings of pumping frequency ω1, from ω(5S,3P3/2) and ω(5s,3p1/2) to be Δ1 and Δ2, respectively, the three UV coherent radiation components were supposed to be generated by the following mixing processes: ωUV = 2ω1 − ω(5S − 4P); ω U V ′ = 2 ω 1 − [ ω ( 5 S → 4 P ) + Δ 1 ] ; ω U V ′ ′ = 2 ω 1 − [ ω ( 5 S → 4 P ) + Δ 2 ] , and also ω U V ′ ′ ′ = 2 ω 1 − ω ( 4 P → 4 S ) . The SERS and the UV signals were tuned as the pumping wavelength was tuned. The measured wavelengths agreed well with the calculated values.
The stimulated hyper-Raman scattering (SHRS) emissions associated with the excitation of the 4P 3/2 state in sodium vapour have been observed in both the forward and backward directions as the pumping laser was tuned near the 3S-4D two-photon resonance. The results show that though the forward SHRS process is greatly reduced by a destructive interference between it and the four-wave mixing (FWM) process induced by itself, the forward SHRS emission has a positive gain and can still be observed under a certain condition.