Abhay Joshi
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View article: In-situ gamma radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice temperatures
In-situ gamma radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice temperatures Open
Multiple space applications require infra-red photodiodes, including spectroscopy, optical communication links, and rapid Doppler shift LIDAR. Extended InGaAs photodiodes with 2.4-micron cutoff wavelength have been recently shown to be res…
View article: Programmable pseudo-random sequence generator for use with universal lidar and its associated method of operation
Programmable pseudo-random sequence generator for use with universal lidar and its associated method of operation Open
A pseudo-random sequence generator for use within a universal lidar system and its corresponding method of operation. The pseudo-random sequence generator uses synchronized shift registers that are in series Binary adders are provided. The…
View article: Comprehensive description of the prevalence, serological and clinical characteristics, and visceral involvement of systemic sclerosis (scleroderma) in a large cohort from the United Arab Emirates Systemic Sclerosis Registry
Comprehensive description of the prevalence, serological and clinical characteristics, and visceral involvement of systemic sclerosis (scleroderma) in a large cohort from the United Arab Emirates Systemic Sclerosis Registry Open
Systemic sclerosis is an autoimmune condition characterized by a wide range of clinical presentations. Registries may serve to expand understanding about systemic sclerosis and aid in patient care and follow-up. The objective of this study…
View article: Radiation testing of 2.4 micron wavelength extended InGaAs photodiodes for 100 MeV/n carbon ions
Radiation testing of 2.4 micron wavelength extended InGaAs photodiodes for 100 MeV/n carbon ions Open
We have successfully tested simultaneously 2.4 Micron Wavelength, Extended InGaAs Photodiodes having diameters of 20, 30, 40, 50, 100, 150, 200, 250, and 290 Micron, coupled with a Single Mode Fiber using 100 MeV/n Carbon (C) Ions up to a …
View article: A Comprehensive Statement on the Diagnosis, Management and Treatment of Systemic Sclerosis Associated Interstitial Lung Disease: An Expert Consensus Panel in the United Arab Emirates
A Comprehensive Statement on the Diagnosis, Management and Treatment of Systemic Sclerosis Associated Interstitial Lung Disease: An Expert Consensus Panel in the United Arab Emirates Open
View article: Assessment of Productivity Constraints in Building Construction Industry
Assessment of Productivity Constraints in Building Construction Industry Open
Construction management deals with planning, organizing, securing and managing resources to bring out the successful completion of specific engineering project goal and objectives. Assessment of productivity in construction industries incl…
View article: Wayside Worker Protection Technology—TrackSafe Phase II, Research and Demonstration Report
Wayside Worker Protection Technology—TrackSafe Phase II, Research and Demonstration Report Open
This report outlines research and demonstration of a roadway worker protection (RWP) warning technology developed by Bombardier Rail called TrackSafe. The system was installed at the Metropolitan Atlanta Rapid Transit Authority (MARTA) and…
View article: In-situ proton radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice and room temperatures
In-situ proton radiation testing of 2.4 micron wavelength extended InGaAs photodiodes at dry ice and room temperatures Open
We have successfully tested 290 µm diameter, 2.4 micron wavelength, Extended InGaAs photodiodes coupled with single mode fiber using 50 MeV Protons at both dry ice temperature (-72 °C) and room temperature (20 °C). The devices were reverse…
View article: Comprehensive radiation testing of uncooled, free space coupled, InGaAs quad photoreceivers
Comprehensive radiation testing of uncooled, free space coupled, InGaAs quad photoreceivers Open
We have comprehensively tested uncooled, free space coupled, InGaAs Quad Photoreceivers having 0.5 mm, 1 mm, and 2 mm diameter integrated with a low noise transimpedance amplifier (TIA) using 30 MeV Protons, 100 MeV Protons, 662 keV Gamma …
View article: Space qualification of 5 to 8 GHz bandwidth, uncooled, extended InGaAs 2.2-micron wavelength, linear optical receivers
Space qualification of 5 to 8 GHz bandwidth, uncooled, extended InGaAs 2.2-micron wavelength, linear optical receivers Open
We have successfully tested 5 to 8 GHz bandwidth, uncooled, Extended InGaAs 2.2 μm wavelength, linear optical receivers, coupled with single mode fibers for 30 MeV Protons, Gamma rays, 1 GeV/n Iron ions, and 1 GeV/n Helium ions. These devi…
View article: Proton and gamma radiation testing of 10 GHz bandwidth, uncooled, linear InGaAs optical receivers
Proton and gamma radiation testing of 10 GHz bandwidth, uncooled, linear InGaAs optical receivers Open
We have successfully tested 10 GHz bandwidth, uncooled, linear InGaAs optical receivers, coupled with a standard single mode fiber for proton and gamma rays. These devices find multiple applications in space for inter-satellite optical com…
View article: Reliability testing of ultra-low noise InGaAs quad photoreceivers
Reliability testing of ultra-low noise InGaAs quad photoreceivers Open
We have developed ultra-low noise quadrant InGaAs photoreceivers for multiple applications ranging from Laser Interferometric Gravitional Wave Detection, to 3D Wind Profiling. Devices with diameters of 0.5 mm, 1mm, and 2 mm were processed,…
View article: Ultra-low noise microwave signal generation with an optical frequency comb
Ultra-low noise microwave signal generation with an optical frequency comb Open
Photonic synthesis of radio frequency waveforms revived the quest for unrivalled microwave purity by its seducing ability to convey the benefits of the optics to the microwave world. In this contribution, we will present a high-fidelity tr…
View article: Photonic microwave signals with zeptosecond-level absolute timing noise
Photonic microwave signals with zeptosecond-level absolute timing noise Open
View article: Ultra-low phase noise frequency-comb-based microwave generation and characterization
Ultra-low phase noise frequency-comb-based microwave generation and characterization Open
International audience
View article: Record Ultra-low Phase Noise 12 GHz Signal Generation with a Fiber Optical Frequency Comb and Measurement
Record Ultra-low Phase Noise 12 GHz Signal Generation with a Fiber Optical Frequency Comb and Measurement Open
International audience