Frequency Comb Photonics Engineer

ABOUT US

Infleqtion is a global quantum technology company solving the worlds most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers sensors and networks. From fundamental physics to leading edge commercial products Infleqtion enables quantum everywhere through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications.

LOCATION

Infleqtion has offices in the USA United Kingdom and Australia. This is a full-time position mainly in our Kidlington Oxford office with the occasional requirement to be in the National Quantum Computing Centre Harwell. Work from home permitted up to 2 days per week based on business needs and manager approval.

POSITION SUMMARY

Infleqtion UK is seeking aFrequency Comb Photonics Engineerto support the development characterisation and integration of optical frequency comb technologies for quantum systems.

This is a hands-on technical role focused on designing building testing and optimising frequency comb systems including micro-comb and PIC-based approaches. The successful candidate will work closely with photonics quantum systems electronics and software teams to evaluate how compact frequency comb technologies can support applications such as precision timing sensing laser stabilisation atom addressing and quantum system integration.

JOB RESPONSIBILITIES

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs this role may perform a combination of some orall ofthe following duties. Duties responsibilities and activities may change or new ones may be assigned.

• Develop test and characterise optical frequency comb systems for quantum technology applications.

• Support design and testing of photonic components relevant to comb generation including resonators lasers modulators passive devices and integrated photonic circuits.

• Build andoperateoptical test setups for frequency comb characterisation stabilisation and performance validation.

• Perform laser characterisation including optical spectra frequency noise relative intensity noise linewidth and stability measurements.

• Characterise modulated laser systems including high-speed waveform measurements and RF/optical measurement setups.

• Develop automated test methods and data analysis workflows for frequency comb and photonic device characterisation.

• Collaborate with integrated photonics quantum systems electronics and software teams to integrate frequency comb technologies into larger systems.

• Work with external foundries suppliers and packaging partners as needed to support device development and evaluation.

• Document experimental results generate technical reports and present findings to internal stakeholders.

• Support risk assessments safe operating procedures and good laboratory practice for optical and laser-based systems.

• PhD in Photonics Optoelectronicsor a related discipline;candidates with equivalent hands-on experience will also be considered.

• Experience developing testing or characterising optical frequency combs micro-combs ultrafast lasers nonlinear photonic systems or related optical technologies.

• Strong understanding of laser physics nonlinear optics optical resonators optical frequency stabilisation and precision optical measurement techniques.

• Hands-on experience with optical laboratory equipment such as optical spectrum analysers RF spectrum analysers photodetectors oscilloscopes wavemeters frequency counters optical power meters and fibre/free-space optics.

• Experience measuring laser or comb performance including optical spectra RF beat notes frequency noise relative intensity noise linewidth and stability.

• Ability to design align troubleshoot and optimise complex optical and photonic test setups.

• Strong data analysis skills using Python MATLAB LabVIEW or similar tools.

• Ability to work effectively in a multidisciplinary collaborative and matrixed technical environment.

• Good verbal and written communication skills with the ability to share technical information clearly with both specialist and non-specialist audiences.

Desirable Skills and Knowledge

• Experience with integrated photonics silicon photonics or PIC-based frequency comb technologies.

• Experience withmicroresonatorfrequency combs Kerr combs electro-optic combs or mode-locked laser systems.

• Familiarity with photonics simulation and layout tools such asLumerical Synopsys COMSOL or similar.

• Experience with laser stabilisation optical phase locking frequency transfer or optical clock systems.

• Knowledge of quantum systems atomic physics atom addressing quantum sensing or quantum networking.

• Experience developing automated optical test stations or hardware-control software.

• Familiarity with RF/microwave measurement techniques and high-speed photonic systems.

• Experience working with foundries photonic packaging partners or external device suppliers.

• Understanding of laser safety and HSE practices in optical laboratory environment

EQUAL OPPORTUNITY

Regardless of your interest in the quantum industry you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but dont meet every single point in our job advertisement please dont hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture actively contribute and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love your gender identity and expression skin colour age appearance disability neurodiversity DNA military/veteran status citizenship and other factors that make up who you are. Your uniqueness is valued welcomed and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications performance merits as well as business needs. We are proud to be an Equal Employment Opportunity Employer.

In addition to your base compensation we offer a generous Total Rewards program which includes:

• Competitive salary

• Incentive Stock Option Plan
• Generous company 10% pension contribution regardless of employee contribution

• Cycle to workscheme

• Tax efficient technology schemes

• BUPA Private Healthcare Insurance once probationary period is successfully completed
• Unlimited PTOsubject to fair usage

Required Experience:

IC