Primary Duties & Responsibilities
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Design, simulate, and develop high-speed, high-sensitivity InGaAs/InP photodiodes for optical transceivers and next-generation optoelectronic applications.
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Support product development from concept through qualification and manufacturing, ensuring performance, quality, and reliability objectives are achieved.
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Collaborate with epitaxial growth and semiconductor process engineers to define and optimize device structures, epitaxial designs, and fabrication processes.
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Work closely with test and reliability engineers to develop characterization plans, analyze device performance, and coordinate reliability qualification activities.
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Evaluate device performance through electrical and optical characterization and recommend design improvements based on test results.
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Partner with internal wafer fabrication teams and external manufacturing partners to develop and implement advanced manufacturing technologies.
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Analyze engineering data, troubleshoot technical issues, and drive continuous improvements in device performance, manufacturability, and yield.
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Document design methodologies, experimental results, and technical findings while contributing to intellectual property development and innovation initiatives.
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Stay current with emerging technologies and industry trends in photodiodes, optical communications, and III-V semiconductor devices. manufacturing technologies.
Education & Experience
- PhD in photodiodes design and development or with 3+ years of relevant experience
- Optoelectronic device design and simulation
- Familiar with photodiode
- epi materials growth and development
- wafer front process and backend process.
- test and characterization.
- Strong analytical and problem-solving skills with the ability to work effectively in cross-functional engineering teams.
- Excellent written and verbal communication skills.
Skills
- Understand the architectural designs of high-speed and high-sensitive InGaAs / InP photodiodes
- Support design high-speed and high-sensitive photodiode epi structures
- Support design both front- and back-end wafer process flows
- Support and Perform device characterization
- Support product qualification and release
Working Conditions
- This role will be based on-site in Fremont, CA.
- Regular use of a computer and other office equipment is necessary.
Physical Requirements
- Sitting for extended periods while working on a computer or in meetings.
- Use of hands and fingers for typing, writing, and handling documents.
- Occasional lifting of objects or materials up to 20 pounds for administrative tasks.
- Ability to communicate verbally and in writing.
Safety Requirements
All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards.
Quality and Environmental Responsibilities
Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.
Culture Commitment
Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:
Integrity – Create an Environment of Trust
Collaboration – Innovate Through the Sharing of Ideas
Accountability – Own the Process and the Outcome
Respect – Recognize the Value in Everyone
Enthusiasm – Find a Sense of Purpose in Work
Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.
If you need assistance or an accommodation due to a disability, you may contact us at [email protected].
Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.
Skills Required
- PhD in photodiode design and development or 3+ years of relevant experience
- Experience in optoelectronic device design and simulation
- Familiarity with epitaxial materials growth and development (epi)
- Experience with wafer front-end and back-end process flows
- Experience performing electrical and optical device characterization
- Experience with device reliability qualification and test planning
- Ability to collaborate across cross-functional engineering teams
- Strong analytical and problem-solving skills
- Excellent written and verbal communication skills
- Ability to work on-site in Fremont, CA
Coherent Corp. Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Coherent Corp. and has not been reviewed or approved by Coherent Corp..
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Healthcare Strength — Healthcare Strength: Health coverage includes multiple national and region-specific options (UHC HDHP/HSA, PPO, EPO; Kaiser in CA; Health Net in OR) plus separate dental (Delta Dental) and vision (VSP), indicating strong breadth and choice. This breadth supports a solid total package in certain roles and locations.
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Equity Value & Accessibility — Equity Value & Accessibility: An Employee Stock Purchase Plan allows buying shares at 85% of market price with contributions up to 10% of pay, expanding ownership access. This feature can materially bolster total rewards even when base pay is mid‑pack.
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Leave & Time Off Breadth — Leave & Time Off Breadth: Paid time off includes 15 vacation days for new hires, 10 paid holidays, and additional paid time during a December shutdown. This structure provides a clear and competitive baseline for time away from work.
Coherent Corp. Insights
What We Do
Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems. We deliver innovations that resonate with our customers in diversified applications for the industrial, communications, electronics, and instrumentation markets. Headquartered in Saxonburg, Pennsylvania, Coherent has research and development, manufacturing, sales, service, and distribution facilities worldwide. For more information, please visit us at coherent.com.


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