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Tunable diode laser absorption tomography (TDLAT) has emerged as a popular nonintrusive technique for simultaneous sensing of gas concentration and temperature. However, TDLAT imaging of concentration and temperature is an ill-posed, nonlinear inverse problem. Major challenges of TDLAT imaging include a highly nonlinear forward model, few projection measurements, and limited training data. We propose...
Using a 3.9μm driving laser focused into a high-pressure gas-filled waveguide, we generate bright, phase matched, fully spatially coherent high harmonic beams in the keV region for the first time.
We demonstrate a 60MHz, cryogenically cooled, mode-locked Yb:YAG oscillator with up to 12W average output power. Mode-locking is achieved via a SESAM, an intracavity SHG crystal, and an iris near focus for spatial mode filtering.
We present a numerical and experimental study of laser-induced jetting behavior associated with direct-write printing of liquids using a polymer absorbing layer. We focus on the limits of minimum material transfer that can be achieved.
Precise wavelength calibration of the multi-object echelle spectrographs used in searches for extrasolar planets is an unsolved problem in astrophysical instrumentation. We present results from a novel tunable laser calibration system that achieves unprecedented precision.
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