Ultrafast variable-wavelength transient grating spectroscopy system for thermal transport measurements
Abstract
The PI will develop an ultrafast, variable-wavelength transient grating spectroscopy system with an ultrafast amplifier as the pump, thereby overcoming the limitations in the existing setup. The system is centered around an ultrafast amplifier that emits 100 fs pulses at 800 nm with a repetition rate of 1 kHz. This laser is used to pump an optical parametric amplifier (OPA) that provides wavelength tuning over wavelengths from 355 nm to several microns. Several CW probe lasers at different wavelengths are used to detect the transient thermal decay. Finally, the signal is detected with a fast photodetector and oscilloscope.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 30, 2016
- Source ID
- N000141612843
Entities
People
- Austin Minnich
Organizations
- California Institute of Technology
- Office of Naval Research
- United States Navy