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Experimental investigation on the temporal contrast of pre-pulses by post-pulses in a petawatt laser facility
- Source :
- Optics letters. 45(5)
- Publication Year :
- 2020
-
Abstract
- We experimentally explore the generation of pre-pulses by post-pulses, created through internal reflection in the optical components, by the nonlinear process associated with the B-integral in the laser chain of the petawatt (PW) facility J-KAREN-P. At a large time delay between the main and the post-pulses, we have found that the pre-pulses are not generated from their counterpart post-pulses at an identical time difference before the main pulse, and the temporal shapes of the pre-pulses are greatly distorted asymmetrically. We have also observed that the peak intensities of the pre-pulses are drastically suppressed compared to the expected value at a small time delay. We briefly describe the origins of the pre-pulses generated by the post-pulses and demonstrate the removal of the pre-pulses by switching to optical components with a small wedge angle at our PW laser facility.
- Subjects :
- Total internal reflection
Materials science
business.industry
02 engineering and technology
Fresnel equations
021001 nanoscience & nanotechnology
Laser
01 natural sciences
Atomic and Molecular Physics, and Optics
Pulse (physics)
law.invention
010309 optics
Nonlinear system
Optics
law
Time difference
0103 physical sciences
Temporal contrast
0210 nano-technology
business
Self-phase modulation
Subjects
Details
- ISSN :
- 15394794
- Volume :
- 45
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Optics letters
- Accession number :
- edsair.doi.dedup.....12a451742ef9d0dc4545c2af7d7a95ed