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Principal Engineer - Opto-Electrical Design and Test

Coherent

Salary not specified
Aug 19, 2025
Fremont, CA, USA
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Coherent Corp. is looking for an engineer to design and characterize opto-electrical/rf components for high-speed fiber optic sub-assemblies, focusing on improving reliability, performance, and yield.

Requirements

  • Strong academic background and knowledge in the areas of optical communications, RF and Microwave engineering, test and characterization of high-speed devices.
  • Experience in advanced packaging of electrical and/or optical devices (flip-chip, BGA, fiber array attachment)
  • Hands-on experience on characterization and measurements of s-parameters, bandwidth by using VNA, TDR, VSA, oscilloscope, signal or vector signal generator etc.
  • Experience with various simulation modeling tools, such as SW, HFSS, ADS, CST, Matlab, etc.
  • Strong laboratory measurement skills required (optical and electrical lab measurements), including script-based test automation
  • Extensive experience testing opto-electronic devices
  • Knowledge of coherent transmission is plus

Responsibilities

  • Primary responsibility is opto-electrical/rf design and characterization of fiber optic sub-assemblies, primarily >100 Gbit/s and higher with focus on coherent transmission.
  • Hands-on experience on characterization and measurements of s-parameters, bandwidth by using VNA, TDR, VSA, oscilloscope, signal or vector signal generator etc.
  • Experience in advanced packaging of electrical and/or optical devices (flip-chip, BGA, fiber array attachment)
  • Work closely with both internal and external suppliers to develop the necessary active components (SiPh PICs, InP components, drivers, TIAs, analog ICs, etc.)
  • Identify and drive reliability, performance and yield improvement projects
  • Strong laboratory measurement skills required (optical and electrical lab measurements), including script-based test automation
  • Experience with various simulation modeling tools, such as SW, HFSS, ADS, CST, Matlab, etc.

Other

  • Strong collaborative and communications skills are required for interactions with customers, with the design, process, and manufacturing teams.
  • Must be strong in problem solving with excellent communication skills to interact with engineering staff, external vendors, and contractors.
  • Interface with internal customers, in both NPI and production organizations.
  • This position is hybrid / onsite
  • May require occasional off-site meetings or travel