Joseph Jing Email & Phone Number

Characterize and implement models to establish lidar thermal angular, distance, and reflectivity performance

San Jose, California, United States

𝗖𝗼𝗺𝗽𝗿𝗲𝘀𝘀𝗲𝗱 𝗨𝗹𝘁𝗿𝗮𝗳𝗮𝘀𝘁 𝗣𝗵𝗼𝘁𝗼𝗴𝗿𝗮𝗽𝗵𝘆 (𝗖𝗨𝗣):Visualizing action potential propagation in neural networks• Designed and built a CUP system utilizing a time-delay integration (TDI) camera, capable of imaging at up to 16 kHz (672x1024 pixels) with an unlimited number of continuous frames.• Constructed a reflection mode fluorescence microscope with patch clamp electrophysiology to integrated with CUP camera.• Imaged action potential dynamics in cultured primary hippocampal neurons loaded with voltage sensitive dyes.Spatio-temporal-spectral (STS) imaging of dissipative solitons• Constructed a spatiotemporal mode-locked multimode fiber laser that generates femtosecond scale 3D dissipative solitons.• Built a STS-CUP system capable of multi-dimensional imaging (space + time + wavelength) of optical events at up to 2 trillion frames per second.• Visualized transient and random dynamics in circulating 3D solitons, including spatial mode hopping, optical intra-pulse attraction and repulsion forces, and spectral mode evolutions.𝗪𝗮𝘃𝗲𝗳𝗿𝗼𝗻𝘁 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴:Frequency-encoded spatiotemporal focusing (FEST)• Combined a spatial light modulator with a 2D optical frequency comb beam array, generated using acousto-optic deflectors, to create a spatial and temporal wavefront shaping system for optical refocusing. • Utilized a single photodiode to measure the frequency encoded beating signal, which allowed for an increase of over 100x in data acquisition speeds as compared to standard optical phase conjugation. • Generated nanosecond scale optical pulses from a continuous-wave laser after optical refocusing by controlling the group phase relationship between the individual frequency components of the frequency comb beam array.• Achieved real-time refocusing through dynamic scattering media, including through in vivo tissue, by using CUDA GPU processing to reduce computation time from 4ms to 500us.

Cheonan, South Chungcheong, South Korea

High-speed Upper Airway imaging with Optical Coherence Tomography (OCT):• Designed, built, and packaged a fully enclosed OCT endoscopic imaging system including a free-space optical interferometer, fiber optic rotary joints, and motorized scanning stages for robust imaging of human airway features in both clinic and operating room environments.• Created a customized sampling clock PCB using emitter coupled logic (ECL) components to increase system speed to 200 frames per second and imaging range to over 50 mm, improvements of 40x and 5x respectively over previous state-of-the-art systems.• Wrote a multithreaded C++ program with CUDA GPU processing to handle real-time acquisition, processing, and display of imaging data (6.5 GB/s). • Developed and self-fabricated rotational endoscopic imaging probes using single mode fibers and miniature gradient index (GRIN) lenses packaged within robust stainless steel torque coils. Simulated optical performance of probes using Zemax and custom written packages.• Fabricated a custom endoscopic probe integrating a fiber-coupled GRIN lens, scanning rotational micromotor and a magnetic field position sensor to capture anatomically correct 3D models of human airways.• Utilized flow simulations in 3D surface models generated from patient airway data to identify obstruction features and regions as a pre-surgical planning tool for physicians.• Designed a galvanometer based scanning probe for phase-sensitive OCT imaging of microscopic airway cilia dynamics. Measured synchronicity of cilia motion based on their height changes; system featured an axial phase sensitivity of 300 picometers.

Doctor Of Philosophy - Phd, Biomedical/Medical Engineering

Master Of Science - Ms, Electrical And Electronics Engineering

Bachelor Of Science - Bs, Electrical Engineering And Computer Science

Activities and Societies: Eta Kappa Nu Honor Society