New parametric emissions in diatomic sodium molecules

  title={New parametric emissions in diatomic sodium molecules},
  author={Z. W. Lu and Q. Wang and W. He and Zuguang Ma},
  journal={Applied Physics B},
By excitation of sodium vapor with an ultra-violet laser, tunable coherent emissions around 688 and 770 nm generated from diatomic sodium molecules have been observed for the first time. We demonstrate that the emission around 688 nm is due to an axially phase-matched four-wave-mixing process involving cascade emissions of ≈2.54 µm and ≈910 nm radiation from sodium dimers. 
1 Citations
Single-photon laser driven four-wave mixing in NO
Abstract When the 5sσ S 2 Σ + (v=0) state of NO molecules was populated through optical-optical double resonance excitation via the 3sσ A 2 Σ + (v=0) state, the strong red light belonging to the E 2Expand


Two-photon excited parametric emission from sodium atoms
Tunable coherent radiation around 840, 830, and 795 nm has been generated upon two-photon excitation of sodium 4d and 5s levels, respectively. The generation is due to special parametric processes. AExpand
Raman and parametric emission from excited states induced by collisions
A collisional energy transfer in the wings of Na 3p and between Na2A1Σu+ and na 3p states has been used to excite a number of stimulated emissions in the near-ir region of 800–850 nm. The detailedExpand
Cascade laser emission of optically pumped Na2 molecules
First continuous laser oscillation at wavelengths around 2.5 μm and 1.9 μm/0.9 μm on C 1πu →(3) 1Σ+g →B 1πu/A 1Σ+u cascade transitions of Na2 has been obtained. The C 1πu state is optically pumpedExpand
830 nm emission in sodium vapor
We demonstrate that the intriguing 830 nm coherent emission, which is observed when sodium vapor is pumped with a high-power pulsed laser tuned near the 3S→4D two-photon transition, is due to anExpand
Third harmonic generation in phase‐matched alkali metal vapors
We report improvements in conversion efficiency for third harmonic generation in sodium and rubidium vapor. 30‐psec pulses of radiation at 1.064 μm have been converted to 0.3547 μm with an energyExpand
Laser transitions among the C1Πu, 31Σg+, A1Σu+, and X1Σg+ states of Na2
Abstract Intense infrared stimulated lines at wavelengths around 2.5 μm have been observed upon excitation of Na 2 by uv radiation from a frequency-doubled narrow-band dye laser. Frequencies of theseExpand
First observation of bound–continuum transitions in the laser‐induced A 1Σ+u–X 1Σ+g fluorescence of Na2
We report an interesting spectrum of Na2 excited by a Kr+ (5682 A) laser which shows a long series of R–P doublets in the region 5600–8000 A and a continuum with three very broad maxima beyond 8000Expand