• Technical Conference: 

    09 – 14 May 2021

  • Exhibition: 

    10 – 14 May 2021

Home > Schedule > Post Session

Post Session


SM1E

Plasma Sensing and Stand-off Detection

Presider: Zachary Reed, National Inst of Standards & Technology

Authentication Required

Access to this content is only available to registered attendees. Registered attendees, please login now to access the content.

Presentations

Non-Invasive Neutral Atom Density Measurements Using fs-TALIF in a Magnetic Linear Plasma Device (SM1E.1)
Presenter: Arthur Dogariu, Princeton University

We report on femtosecond TALIF measurements of neutral density in a mirror plasma device. We have measured H density down to 1011 cm-3, and the dynamics of the H neutrals in quasi-CW and pulsed plasma.

Authors:Arthur Dogariu, Princeton University / Eugene Evans, Princeton Plasma Physics Lab / Sangeeta Vinoth, Princeton Plasma Physics Lab / Samuel Cohen, Princeton Plasma Physics Lab

  Paper

Laser-Induced Fluorescence of Ultrafast Laser Filament Generated Plasmas for Standoff Detection (SM1E.2)
Presenter: Sivanandan Harilal, Pacific Northwest National Laboratory

Ultrafast laser filament produced plasmas are made at a standoff distance of ~ 10 m. The Al emission signal is enhanced by laser-induced fluorescence signals are measured. A comparison is made between the standoff signatures of LIBS and LIF emission.

Authors:Elizabeth Kautz, Pacific Northwest National Laboratory / Jeremy Yeak, Opticslah, Inc. / Mark Phillips, University of Arizona / Sivanandan Harilal, Pacific Northwest National Laboratory

  Paper

Analysis of Traces by LIBS: Methods to Maximize the Detection Sensitivity (SM1E.3)
Presenter: Violeta Lazic, ENEA

Chemical analysis of small sample amounts represents a special problem in Laser Induced Breakdown Spectroscopy (LIBS). The methods for sensitive LIBS measurements on small volumes of liquids and on trace particles will be discussed.

Authors:Violeta Lazic, ENEA

  Paper

Simultaneous Measurement of Optical Spectroscopic Signatures From Ultrafast Laser-Produced Plasmas (SM1E.4)
Presenter: Sivanandan Harilal, Pacific Northwest National Laboratory

We performed simultaneous measurement of absorption, emission, and laser-induced fluorescence spectroscopic signatures for determining femtosecond laser-produced plasma’s physical properties throughout its lifecycle.

Authors:Sivanandan Harilal, Pacific Northwest National Laboratory / Elizabeth Kautz, Pacific Northwest National Laboratory / R. Jason Jones, University of Arizona / Mark Phillips, University of Arizona

  Paper

Kilometer-Range Distributed Acoustic Sensing by Time-Expanded Phase-Sensitive Time-Domain Reflectometry (SM1E.5)
Presenter: Vicente Durán, Universitat Jaume I

We demonstrate acoustic sensing over 1 km with 4-cm resolution, using megahertz detection bandwidth and a sampling rate of 40 Hz, by means of two electro-optic frequency combs with very dissimilar line spacing.

Authors:Miguel Soriano-Amat, Universidad de Alcalá de Henares / Hugo Martins, Instituto de Óptica "Daza de Valdés" CSIC / Luis Costa, Universidad de Alcalá de Henares / Sonia Martinez-Lopez, Universidad de Alcalá de Henares / Miguel González-Herraez, Universidad de Alcalá de Henares / María R. Fernández-Ruiz, Universidad de Alcalá de Henares / Vicente Durán, Universitat Jaume I

  Paper

Ultrafast Parallel LiDAR With All-Optical Spectro-Temporal Encoding (SM1E.6)
Presenter: Zihan Zang, Tsinghua University

The speed of a single-pixel LiDAR is limited by the round-trip delay and the speed of beam steering. We exploit optical code division multiplexing and inertia-free spectral scanning to break the speed limit.

Authors:Zihan Zang, Tsinghua University / Zhi Li, Tsinghua University / Yi Luo, Tsinghua University / Yanjun Han, Tsinghua University / Xuanyi Liu, Tsinghua University / Lican Wu, Tsinghua University / H. Y. Fu, Tsinghua University

  Paper

Dynamic Measurement of Fiber-Birefringence Spatial Distribution by Coherent Heterodyne Detection of Rayleigh Backscattered Light (SM1E.7)
Presenter: Nanako Takei, Meiji University

Dynamic measurement of fiber-birefringence spatial distribution along the fibers is performed by coherent heterodyne detection of Rayleigh backscattered light. Local fiber vibration at 250 Hz over the 80-km-long fibers was successfully measured by the technique.

Authors:Nanako Takei, Meiji University / Shiro Ryu, Meiji University

  Paper