Abstract
The pressure dependence of the emission intensities measured for Raman sidebands arising through three-color four-wave difference-frequency mixing (FWRM) was examined using a 200 nm probe beam. Using a three-color FWRM scheme, it was possible to efficiently generate Raman sidebands in the vicinity of the probe beam. By introducing a two-color pump pulse prior to the probe pulse, the coherent vibrational motion of hydrogen was induced immediately after the pump pulse and continued thereafter on a time scale of at least several picoseconds. The intensity of the anti-Stokes sideband increased with increasing hydrogen pressure at low pressures. The ratio of the intensities measured for cascade Raman emissions approached 27% at high pressures. When the fourth harmonic emission was employed as a probe beam, the anti-Stokes emission was observed at 185 nm. The conversion efficiency and the pulse energy were estimated to be 16% and 1.6 μJ, respectively. The conversion efficiency could be increased if a probe laser with a better beam quality were used and even a higher value could be obtained if a pump laser with a higher output power were to be used, in conjunction with a capillary waveguide to increase the interaction length with a Raman-active medium of hydrogen.
| Original language | English |
|---|---|
| Pages (from-to) | 184-187 |
| Number of pages | 4 |
| Journal | Optics and Laser Technology |
| Volume | 88 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Cite this
Generation of a femtosecond vacuum ultraviolet optical pulse by four-wave Raman mixing. / Vu, Duong; Nguyen, Trong Nghia; Imasaka, Totaro.
In: Optics and Laser Technology, Vol. 88, 01.01.2017, p. 184-187.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Generation of a femtosecond vacuum ultraviolet optical pulse by four-wave Raman mixing
AU - Vu, Duong
AU - Nguyen, Trong Nghia
AU - Imasaka, Totaro
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The pressure dependence of the emission intensities measured for Raman sidebands arising through three-color four-wave difference-frequency mixing (FWRM) was examined using a 200 nm probe beam. Using a three-color FWRM scheme, it was possible to efficiently generate Raman sidebands in the vicinity of the probe beam. By introducing a two-color pump pulse prior to the probe pulse, the coherent vibrational motion of hydrogen was induced immediately after the pump pulse and continued thereafter on a time scale of at least several picoseconds. The intensity of the anti-Stokes sideband increased with increasing hydrogen pressure at low pressures. The ratio of the intensities measured for cascade Raman emissions approached 27% at high pressures. When the fourth harmonic emission was employed as a probe beam, the anti-Stokes emission was observed at 185 nm. The conversion efficiency and the pulse energy were estimated to be 16% and 1.6 μJ, respectively. The conversion efficiency could be increased if a probe laser with a better beam quality were used and even a higher value could be obtained if a pump laser with a higher output power were to be used, in conjunction with a capillary waveguide to increase the interaction length with a Raman-active medium of hydrogen.
AB - The pressure dependence of the emission intensities measured for Raman sidebands arising through three-color four-wave difference-frequency mixing (FWRM) was examined using a 200 nm probe beam. Using a three-color FWRM scheme, it was possible to efficiently generate Raman sidebands in the vicinity of the probe beam. By introducing a two-color pump pulse prior to the probe pulse, the coherent vibrational motion of hydrogen was induced immediately after the pump pulse and continued thereafter on a time scale of at least several picoseconds. The intensity of the anti-Stokes sideband increased with increasing hydrogen pressure at low pressures. The ratio of the intensities measured for cascade Raman emissions approached 27% at high pressures. When the fourth harmonic emission was employed as a probe beam, the anti-Stokes emission was observed at 185 nm. The conversion efficiency and the pulse energy were estimated to be 16% and 1.6 μJ, respectively. The conversion efficiency could be increased if a probe laser with a better beam quality were used and even a higher value could be obtained if a pump laser with a higher output power were to be used, in conjunction with a capillary waveguide to increase the interaction length with a Raman-active medium of hydrogen.
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UR - http://www.scopus.com/inward/citedby.url?scp=84988487533&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2016.09.010
DO - 10.1016/j.optlastec.2016.09.010
M3 - Article
AN - SCOPUS:84988487533
VL - 88
SP - 184
EP - 187
JO - Optics and Laser Technology
JF - Optics and Laser Technology
SN - 0030-3992
ER -