Open-aperture Z-scan study for absorption saturation: accurate measurement of saturation intensity in YLF:Yb for optical refrigeration
Abstract
Knowledge of saturation intensity of gain or absorption plays a fundamental role in a variety of applications ranging from lasers to many nonlinear optical processes. Here, we present an analytical expression for open-aperture Z-scan transmission for accurately measuring the saturation intensity in the low absorbance samples but at arbitrary pump intensities. We exploit this formalism to investigate the absorption saturation of L i Y F 4 : Y b 3 + (YLF:Yb) in the anti-Stokes excitation region for optical refrigeration at high pump intensities. An absorption saturation intensity of 14.5 ± 1 k W / c m 2 was measured in YLF:Yb at 1020 nm ( E | | c ) at room temperature.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 11, 2021
- Source ID
- 10.1364/ol.419551
Entities
People
- Alexander R Albrecht
- Azzurra Volpi
- Jackson Kock
- Mansoor Sheik‐Bahae
- Markus P Hehlen
- Richard I. Epstein
Organizations
- Air Force Office of Scientific Research
- Defense Advanced Research Projects Agency
- Los Alamos National Laboratory
- ThermoDynamic Films LLC
- University of New Mexico