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Laser Characterization, Temp

Lightmatter - Mountain View, CA

Posted Jun 10, 2026

Benefits

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Salary
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401(k) match
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About this role

Laser Characterization, Temp Mountain View, CA Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world's first 3D-stacked photonics engine, Passageā„¢, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads. Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter! If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders. Lightmatter is (re)inventing the future of computing with light! As a Laser Characterization Intern, you will focus on the fundamental performance, physics, and characterization of the semiconductor laser sources that power our photonic computing architecture. You will be responsible for executing State-of-the-Art (SOA) laser testing to ensure the highest levels of spectral purity and stability. Responsibilities - Perform hands-on characterization of semiconductor lasers, laser sources, and semiconductor optical amplifiers. - Measure and analyze laser and SOA performance metrics, including output power, wavelength, optical spectrum, side-mode suppression ratio, relative intensity noise, gain, saturation behavior, and wavelength/power stability. - Conduct LIV measurements and evaluate laser behavior across current, voltage, temperature, and operating conditions. - Perform wavelength and optical power stability measurements over time and across temperature. - Characterize optical spectra using optical spectrum

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