Infleqtion

Senior Laser and Nonlinear Photonics Engineer

Infleqtion

full-time

Posted on:

Location Type: Hybrid

Location: Louisville • Colorado • United States

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Job Level

Senior

Tech Stack

Python

About the role

  • - Architect, build, and validate laser and nonlinear photonics subsystems that meet demanding specs (linewidth, frequency noise, RIN, power, stability, efficiency, SWaP, reliability).
  • - Develop and run system-level experiments: optical bench builds, fiber-based architectures, free-space coupling, high-speed modulation, and precision frequency control.
  • - Implement stabilization and control: frequency locks, servo design, modulation/demodulation schemes, and long-term drift mitigation.
  • - Create robust measurement pipelines (automation, calibration, data analysis) to accelerate iteration and improve reproducibility.
  • - Translate experimental learnings into engineering requirements for packaging, manufacturability, and productization; collaborate closely with PIC designers, electronics, packaging, and manufacturing partners.

Requirements

  • - M.S. or Ph.D. in Electrical Engineering, Optical Engineering, or a related field (or equivalent practical experience).
  • - [5]+ years of hands-on experience building and characterizing laser systems and/or nonlinear photonics experiments with demonstrated outcomes (prototypes delivered, performance records, or deployed systems).
  • - Deep practical experience with optical instrumentation and lab execution (OSA, ESA, RF sources, high-speed photodiodes, wavemeters, interferometers, power meters, polarization control, low-noise detection).
  • - Experience measuring and improving laser performance metrics (e.g., linewidth estimation, frequency noise/phase noise, RIN, drift, mode hops) and diagnosing failure modes.
  • - Comfort designing experiments that mix optics + RF + controls (AOM/EOM modulation, photodetection, servo loops, timing/synchronization).
  • - Strong documentation and communication skills; ability to drive cross-functional alignment and make clear technical tradeoffs.
  • **We Highly Value:**
  • - Nonlinear optics/photonics experience in one or more of: SHG/SFG/DFG, OPO/OPG, PPLN/PPLT (bulk or waveguide), microresonator/Kerr combs, supercontinuum, or parametric amplification.
  • - Experience with narrow-linewidth diode lasers, fiber lasers, solid-state lasers, external-cavity designs, and/or integrated/hybrid laser architectures.
  • - Familiarity with photonic integration constraints and how system requirements map into PIC designs (thermal sensitivity, coupling losses, reflections, backscatter, isolation).
  • - Experience transitioning lab builds toward ruggedized/packaged systems (alignment tolerancing, thermal design, vibration sensitivity, reliability test plans).
  • - Scientific programming for automation/analysis (Python, LabVIEW) and version control best practices.
  • - [Optional if relevant] Experience in atomic/quantum physics experiments (laser cooling, spectroscopy, frequency references) or similar precision photonics domains.
Benefits
  • - 100% company-paid medical, dental, vision, short/long-term disability
  • - Equity Package
  • - Employer-funded Health Savings Account
  • - Unlimited PTO
  • - 401(k) match
  • - Company-paid Life and AD&D Insurance
  • - Flexible Savings Account
  • - Paid FMLA, Maternity/Paternity Leave
  • - Relocation Assistance

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
laser systemsnonlinear photonicsoptical instrumentationhigh-speed modulationfrequency controlmeasurement pipelinesoptics + RF + controlsscientific programmingdata analysisexperiment design
Soft skills
documentation skillscommunication skillscross-functional alignmenttechnical tradeoffs
Certifications
M.S. in Electrical EngineeringPh.D. in Optical Engineering