Abstract
We report on a novel phenomenon occurring when ultrashort laser pulses are diffracted in a Bragg grating recorded in a photo-thermo-refractive glass: two intense beams at the third harmonic of the incident laser frequency appear between the direct and the diffracted laser beams. A high conversion efficiency of about 0.04% at an incident intensity of 5 × 1011 W cm -2 in a 1 mm thick grating is attributed to self-phase matching for the third harmonic generation via Cherenkov radiation from the interfering third order polarization of the incident and diffracted beams. It is assumed that this is a general phenomenon for diffraction in a volume grating.
| Original language | English |
|---|---|
| Pages (from-to) | 50-53 |
| Number of pages | 4 |
| Journal | Journal of Physics D: Applied Physics |
| Volume | 39 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2006 Jan 7 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Optical third harmonic generation during femtosecond pulse diffraction in a Bragg grating. / Juodkazis, Saulius; Gaižauskas, Eugenijus; Jarutis, Vygandas; Reif, Jürgen; Matsuo, Shigeki; Misawa, Hiroaki.
In: Journal of Physics D: Applied Physics, Vol. 39, No. 1, 07.01.2006, p. 50-53.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Optical third harmonic generation during femtosecond pulse diffraction in a Bragg grating
AU - Juodkazis, Saulius
AU - Gaižauskas, Eugenijus
AU - Jarutis, Vygandas
AU - Reif, Jürgen
AU - Matsuo, Shigeki
AU - Misawa, Hiroaki
PY - 2006/1/7
Y1 - 2006/1/7
N2 - We report on a novel phenomenon occurring when ultrashort laser pulses are diffracted in a Bragg grating recorded in a photo-thermo-refractive glass: two intense beams at the third harmonic of the incident laser frequency appear between the direct and the diffracted laser beams. A high conversion efficiency of about 0.04% at an incident intensity of 5 × 1011 W cm -2 in a 1 mm thick grating is attributed to self-phase matching for the third harmonic generation via Cherenkov radiation from the interfering third order polarization of the incident and diffracted beams. It is assumed that this is a general phenomenon for diffraction in a volume grating.
AB - We report on a novel phenomenon occurring when ultrashort laser pulses are diffracted in a Bragg grating recorded in a photo-thermo-refractive glass: two intense beams at the third harmonic of the incident laser frequency appear between the direct and the diffracted laser beams. A high conversion efficiency of about 0.04% at an incident intensity of 5 × 1011 W cm -2 in a 1 mm thick grating is attributed to self-phase matching for the third harmonic generation via Cherenkov radiation from the interfering third order polarization of the incident and diffracted beams. It is assumed that this is a general phenomenon for diffraction in a volume grating.
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U2 - 10.1088/0022-3727/39/1/009
DO - 10.1088/0022-3727/39/1/009
M3 - Article
VL - 39
SP - 50
EP - 53
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 1
ER -