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Astera Labs

Designs chips that connect data center systems

Tech Lead Optical Test Engineer

Hardware Validation & TestingConfirmed live in the last 24 hours
Full-timeSan Jose, CA, USAIn-person

About the Job

Requirements

  • A Master of Science or Ph.D. in Electrical Engineering, Optical Engineering, Physics, Photonics, or a related discipline.
  • Five to seven or more years of experience in optical testing, photonic device characterization, or optical transceiver development.
  • Strong understanding of silicon photonics devices, including modulators, photodetectors, multiplexers, grating couplers, and edge couplers.
  • Hands-on experience with optical test equipment, including optical spectrum analyzers, optical modulation amplitude equipment, tunable lasers, polarization controllers, power meters, high-speed real-time oscilloscopes, bit-error-rate testers, and pattern generators.
  • Proficiency in high-speed optical link testing at 100G per lane and above, using PAM4 and NRZ.
  • Programming skills in Python, MATLAB, LabVIEW, or C/C++ for test automation.
  • Knowledge of optical communication standards, including IEEE 802.3, OIF-CEI, and CMIS.
  • Familiarity with statistical analysis methods and data visualization tools.

Responsibilities

  • Define and implement optical test architectures and test flows across optical wafer probe testing, package-level testing and characterization, and optical module validation.
  • Execute characterization and qualification testing of co-packaged optics components and assemblies.
  • Perform high-speed optical measurements, including insertion loss, return loss, extinction ratio, eye diagram analysis, bit-error-rate testing, and optical modulation amplitude.
  • Characterize optical performance parameters such as wavelength accuracy, channel spacing, spectral linearity, and crosstalk for wavelength-division-multiplexing-based co-packaged optics architectures.
  • Design and build optical test stations incorporating fiber alignment systems, optical switches, tunable lasers, optical spectrum analyzers, high-speed oscilloscopes, and bit-error-rate testers.
  • Develop test automation software, automated test scripts, and frameworks using Python, LabVIEW, MATLAB, or similar platforms.
  • Implement high-throughput test solutions suitable for wafer-scale and production-level testing.
  • Analyze large-scale optical test data to identify trends, failure modes, and yield-limiting factors.
  • Generate statistical reports, including Cpk, gauge repeatability and reproducibility, and statistical process control, to monitor process stability and test repeatability.
  • Collaborate with design and process engineering teams to provide feedback for performance optimization.
  • Create and maintain test documentation, standard operating procedures, and knowledge base articles.
  • Interface with external suppliers and foundries on silicon photonics wafer-level test requirements.
  • Participate in design reviews to ensure testability and provide design-for-test recommendations.

Desired Qualifications

  • Experience specifically with co-packaged optics or on-board optics architectures.
  • Experience with wafer-level optical probing and testing tool hardware and software, as well as automated photonics test platforms.
  • Experience transitioning test processes from lab or prototype settings to high-volume manufacturing.

About the Company

Astera Labs

Designs chips that connect data center systems

Astera Labs designs chips and hardware modules that move data between processors, memory and accelerators in data centers. Its customers include cloud providers, chip vendors and equipment makers building servers and large computing clusters for AI and other workloads. Retimers restore signal quality, switches connect devices and memory controllers expand the memory available to computing systems, while COSMOS software monitors and manages these links. The company sells its products directly and through distributors, using outside manufacturers to fabricate and assemble its hardware. Astera Labs was founded in 2017 and is headquartered in San Jose, California.

Company size
501-1,000
Company stage
IPO
Headquarters
San Jose, CA
Founded
2017

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