Thermal effects in molecular gas-filled hollow-core fibers
Abstract
Few-cycle sources with high average powers are required for applications to attosecond science. Raman-enhanced spectral broadening of Yb-doped laser amplifiers in molecular gases can yield few-cycle pulses, but thermal excitation of vibrational and rotational degrees of freedom may preclude high-power operation. Here we investigate changes in the spectral broadening associated with repetitive laser interactions in an N 2 O -filled hollow-core fiber. By comparing experimental measurements of the spectrum associated with each laser pulse to simulations based on a density matrix model, we find that losses in a spectral bandwidth and transmission are largely dominated by thermal excitation of the gas.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 07, 2021
- Source ID
- 10.1364/ol.422983
Entities
People
- John E Beetar
- M Nrisimhamurty
- Michael Chini
- Tran-Chau Truong
- Yangyang Liu
Organizations
- Air Force Office of Scientific Research
- Office of Basic Energy Sciences
- University of Central Florida