The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory contains a 192-beam 4.2 MJ neodymium glass laser (around 1053 nm or 1w) that is frequency converted to 351nm light or 3w. It was built to access the extreme high energy density conditions needed to support the nation’s nuclear stockpile in the absence of further underground nuclear tests, including studying Inertial Confinement Fusion (ICF) and ignition in the laboratory.
Over the last year, important results have been obtained demonstrated a fusion yield of 1.35MJ with 1.9MJ of laser energy (and 440 TW power) injected in the target, bringing the NIF to the threshold of ignition [2-3]. As the yield curve near ignition is steep, the laser performance team has focused on providing improved power accuracy and precision (better shot-to-shot reproducibility) with a high-fidelity pulse shaping system (HiFiPS), and also on extending the NIF operating power and energy space by 15% to 2.2MJ and 500TW.
The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory contains a
192-beam 4.2 MJ neodymium glass laser (around 1053 nm or 1w) that is frequency converted to
351nm light or 3w. It has been designed to support the study of Inertial Confinement Fusion (ICF)
and High Energy Density Physics (HEDP). The NIF Precision Diagnostic System (PDS) was reactivated and new
diagnostic packages were designed and fielded that offer a more comprehensive suite
of high-resolution measurements. The current NIF laser performance will be presented as well as the preliminary results obtained with the various laser experimental campaigns using the new diagnostic tool suites.
The silicon photonics industry is projected to be a multibillion dollar industry driven by the growth of data centers. In this work, we present an interactive online tool for silicon photonics. Silicon Photonics Cloud (SiCCloud.org) is an easy to use instructional tool for optical properties of silicon and related materials, waveguide design and modal simulations as well as information capacity of silicon channels.
We present SiCloud (Silicon Photonics Cloud), the first free, instructional web-based research and education tool for
silicon photonics. SiCloud’s vision is to provide a host of instructional and research web-based tools. Such interactive
learning tools enhance traditional teaching methods by extending access to a very large audience, resulting in very high
impact. Interactive tools engage the brain in a way different from merely reading, and so enhance and reinforce the
learning experience. Understanding silicon photonics is challenging as the topic involves a wide range of disciplines,
including material science, semiconductor physics, electronics and waveguide optics. This web-based calculator is an
interactive analysis tool for optical properties of silicon and related material (SiO2, Si3N4, Al2O3, etc.). It is designed to
be a one stop resource for students, researchers and design engineers. The first and most basic aspect of Silicon
Photonics is the Material Parameters, which provides the foundation for the Device, Sub-System and System levels.
SiCloud includes the common dielectrics and semiconductors for waveguide core, cladding, and photodetection, as well
as metals for electrical contacts. SiCloud is a work in progress and its capability is being expanded. SiCloud is being
developed at UCLA with funding from the National Science Foundation’s Center for Integrated Access Networks
(CIAN) Engineering Research Center.
KEYWORDS: Near field, Near field optics, Fourier transforms, Absorption, Dispersion, Interferometry, Phase measurement, Photodetectors, Spectrum analysis, High speed electronics
The time-stretch dispersive Fourier transform enables high-throughput acquisition of optical spectra in single-shot measurements by performing an analog Fourier transform and stretching the signal to facilitate capture with high-speed electronics. The coherent time-stretch transform adds complex-field detection so that spectral amplitude and phase can be measured in the temporal near field, i.e., without a strict dispersion requirement. Full-field spectra are recovered via temporal interferometry on waveforms dispersed in the temporal near field. Real-time absorption spectra including both amplitude and phase information are acquired at 37 MHz.
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