WASHINGTON, Feb. 24 -- Scientists using observations from NASA's Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) satellite detected flashes of gamma ray energy in Earth's upper atmosphere in greater detail than ever before. RHESSI is part of NASA's Sun-Earth Connection program. It was designed to study x-rays and gamma rays from solar flares. However, RHESSI's detectors pick up gamma rays from a variety of sources. A team of researchers from the University of California, Santa Cruz, University of California, Berkeley, and the University of British Columbia, Vancouver, have...Read full articleRelated content from Photonics MediaArticlesIn-Space Laser Power Beaming Experiment Enters OrbitThe U.S. Naval Research Laboratory (NRL) completed its launch of the Space Wireless Energy Laser Link (SWELL), an experiment to demonstrate laser power beaming in space as part of the scheduled U.S....Photonics.com 3/16/2023VIGO Photonics’ IR Sensors Board NASA’s Orion: Week in Brief: 06/16/22III-V Epi, a provider of compound semiconductor wafer foundry services, completed the Innovate UK-funded, SHARK-VECSELs project with the University of Strathclyde. The project saw the development of...Photonics.com 6/17/2022Integrated Photonic Quantum Sensing Takes Aim at Climate ResearchA NASA-funded collaboration will focus on advancing quantum sensing technology to enable new understanding of Earth and the effects of climate change. Led by the University of Texas at Austin (UT),...Photonics.com 3/28/2023Hesai Group Charges Forward with IPO Pricing: Week in Brief: 02/10/23Lidar technology company Hesai Group announced the pricing of its initial public offering of 10 million American Depositary Shares (ADS), at $19 per ADS, for a total offering size of $190 million....Photonics.com 2/10/2023ProductsSilicon Photodiode ChipsThe VTH21 series of photodiodes from Excelitas Technologies Corp. are low-capacitance silicon photodiode chips for radon gas detection. Featuring a robust chip design in either a waffle pack or...Photonics Spectra December 2022 IssuePyroelectric DetectorThe LRM-292 pyroelectric detector from InfraTec GmbH is a multi-channel detector with an integrated operational amplifier, thermal compensation, and TO46 housing. Measuring 4.7 mm in diameter,...Photonics.com 2/6/2023Ethylene Oxide Monitoring SystemThe Ambient Air Monitoring System for Ethylene Oxide (EtO) has been announced by Picarro Inc., providing a continuous, automated solution for community monitoring stations and industrial fencelines....Photonics.com 8/24/2022Optical Sensing InterrogatorsFemto Sensing International has expanded its SX line of optical sensing interrogators for high-sensor-count fiber Bragg grating (FBG) applications. Designed for industrial, medical, civil,...Photonics.com 12/12/2022Photonics Handbook ArticlesRadiometry: A Simplified Description of Light MeasurementRadiometry involves several activities. The two most common are the description and measurement of optical radiation, and, starting with the knowledge of some aspects of optical radiation at one...Photonics HandbookPhotomultipliers: Low-Light, High-Speed SpecialistsThe applications where rapid detection of light is a must are many. They include a wide variety: semiconductor inspection, gene sequencing, oil well logging and high-energy physics. The reasons for...Photonics HandbookPhysical Constants & Conversion FactorsPhysical Constants & Conversion Factors Length [I] 1 meter (m) = 39.3700 in. = 3.280833 ft = 1.093611 yd 1 kilometer (km) = 0.6213711 mi = 0.53996 nautical mi 1 micron (µm) =...Photonics HandbookDigital Cameras: Smaller Pixels for Higher ResolutionIn the search for ever-higher pixel counts for the digital still camera, it is clear that, if chip size remains constant, then “more pixels” means “smaller pixels.” The...Photonics HandbookWhite PapersHDR Imaging for Automotive Sensing Applications Featuring the Triton™ HDR Camera with AltaView™ Tone MappingThis white paper compares current sensing technologies for automotive applications. It outlines the challenges faced by LiDAR, Radar, Sonar, and traditional HDR cameras, and addresses the benefits of...Photonics.com 1/18/2024Lumispot Tech Laser Solution- Pulsed Fiber Laser For Automotive Laser LIDAR EquipmentLumispot Tech Laser Solution - Light source of 1550 nm/1535 nm pulsed fiber laser for laser lidar used in unmanned driving, with the function of ranging, detection etc.Photonics.com 10/13/2023Phase Detection with Lock-in Amplifier and PhasemeterPrecise and sensitive phase detections are often required for impedance and optics-based measurements. For example, measuring the phase shift between current and voltage reveals the complex impedance...Photonics.com 9/14/2023Avalanche Photodiodes - Design and ApplicationsThis white paper will discuss avalanche photodiodes beginning with a brief description, their applications, and the basics of operation. The discussion will be an overview of the important...Photonics.com 10/20/2023WebinarsThe Universe Through Sight, Sound, and Touch: Exploring Multiwavelength Astrophysics Data SetsInformation from the universe can be more than just a two-dimensional snapshot. These digital assets can be transformed to enable us to listen to, feel, or virtually move through cosmic objects....Photonics.com 3/8/2023LAM Technology, Opportunities and ChallengesLearn about LAM from a seasoned professional with more than 40 years of experience in laser technology and its application. This webinar will provide you with a solid foundation in laser...Photonics.com 1/12/2017Photonics in Space ApplicationsFREE WEBINAR Webinar Questions and Answers from Dr. Rubenchik: Dr. Alexander Rubenchik Lawrence Livermore National Laboratory, Livermore, Calif. The Promise of Pulsed Lasers in...Photonics.com 11/15/2012Laser Transmitters for Fiber Optic CommunicationsFREE WEBINAR Dr. Hamid Hemmati Supervisor, Optical Communications Group Jet Propulsion Laboratory California Institute of Technology In this talk, Dr. Hemmati will cover...Photonics.com 3/28/2013Photonics Dictionary Termssaturation1. The decrease of the absorption (or gain) coefficient of a medium near some transition frequency when the power of the incident radiation near that frequency exceeds a certain value. As long as the...Photonics Dictionaryfree-electron laserA free-electron laser (FEL) is a type of laser that generates coherent, high-intensity electromagnetic radiation by using a beam of accelerated electrons as the lasing medium. Unlike traditional...Photonics Dictionarysecond-harmonic generationSecond-harmonic generation (SHG) is a nonlinear optical process that occurs when two photons with the same frequency combine within a nonlinear material, resulting in the generation of a new photon...Photonics Dictionaryequal-energy spectrumSpectrum characterized by equal energy (power, flux) per unit wavelength interval.Photonics DictionaryMediaLight Matters Extra: Optics & Photonics Technology Program, STCC - 09.2017In this month’s Light Matters Extra, we take you to the Springfield Technical Community College campus and introduce you to Professor Nick Massa, who has been teaching Optics and Photonics there for...Photonics.com 9/28/2017Photonics on the Showroom Floor and in the Lab - LIGHT MATTERS 02.2018On this month's episode of Light Matters, we take you on a brief tour of the Higgins Laboratories at Worcester Polytechnic Institute (WPI). Quinsigamond Community College and WPI received a $4M grant...Photonics.com 2/21/2018A 'Smart' Lighting Revolution - LIGHT MATTERS 08.2017In this episode, we take you to a U.S. National Science Foundation Engineering Research Center at Rensselaer Polytechnic Institute in New York. Researchers there are leading the charge for "smart"...Photonics.com 8/28/2017Fundamentally Different Photonics - LIGHT MATTERS 03.2018On this month's episode of Light Matters, we take you to the South by Southwest (SXSW) Trade Show in Austin, Texas, as new photonics innovations hit the show floor of the Austin Convention Center....Photonics.com 3/29/2018Photonics Buyers' Guide CategoriesRemote Sensing EquipmentPhotoacoustic DetectorsScintillation DetectorsPower MetersCompaniesAndor TechnologyAndor Technology Ltd is a global developer and manufacturer of high-performance scientific cameras, microscopy systems and spectrographs for academic, government, and industrial applications. Founded...Photonics Buyers' GuideOZ Optics LimitedEstablished in 1985, OZ Optics is a leading worldwide supplier of fiber optic components, test equipment and sensors. OZ Optics manufactures its products in three locations, Ottawa (Canada),...Photonics Buyers' GuideExcelitas Technologies Corp.Excelitas Technologies® Corp. is a leading industrial technology manufacturer focused on delivering innovative, market-driven photonic solutions to meet the illumination, optical, optronic,...Photonics Buyers' GuideMKS Ophir, Light & MeasurementOphir is a brand within the MKS Instruments Light & Motion division. The Ophir product portfolio consists of laser and LED measurement products, including laser power and energy meters, laser...Photonics Buyers' Guide