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Nobody drives out to fix a satellite. Once a spacecraft leaves the pad, every part on board must perform as promised for years, with no second chances. No technician is going up with a screwdriver to realign a sensor. Near-infrared (NIR) photodiodes sit near the front of that chain. They turn light into the electrical … Continue reading
Most engineers start with silicon. It’s cheap. It’s familiar. It works great below 1000 nm. Then the wavelength moves. Fiber optic networks run at 1310 nm and 1550 nm. LiDAR systems push into longer near-infrared bands. Spectroscopy depends on SWIR absorption features silicon can’t touch. Silicon’s practical detection range ends near 1.1 µm. At that point, silicon … Continue reading
As laser-based communications expand across terrestrial networks, Low Earth Orbit (LEO) constellations and satellite-to-satellite links, Pointing, Acquisition and Tracking (PAT) becomes critical to maintaining reliable connectivity. At the heart of this process is accurate detection of the laser spot position. In a technical paper from GPD Optoelectronics, George Gasparian explores how InGaAs quadrant photodiodes support … Continue reading
When selecting a photodetector, the device with the strongest individual specification is not necessarily the best choice for the system. Every design involves trade-offs: A larger active area can improve light collection and alignment tolerance, but it can also increase capacitance and reduce speed. Extended wavelength response can support longer-wavelength SWIR applications, but this may … Continue reading
Every headline about the AI infrastructure boom centers on GPUs. OpenAI’s Stargate initiative alone carries a price tag near 500 billion dollars, and hyperscalers across the country are breaking ground on new data center capacity at a pace the industry has never seen. But underneath the compute story sits a quieter bottleneck: getting data into … Continue reading
Photodetectors sit at the heart of an enormous range of modern systems: fiber optic communications networks, LiDAR sensors in autonomous vehicles, gas analyzers, medical imaging equipment, and precision scientific instruments. Despite this diversity of applications, the selection process follows a consistent logic that is grounded in four fundamental questions about your system and a working … Continue reading