Optical Engineer Iii - Fiber Laser

Drawing on 50 years of experience, Lumibird designs, manufactures, and distributes laser solutions for scientific, industrial, and medical use from its various sites in the USA and abroad (France, Italy, Slovenia, Sweden, Australia, etc.). Distinguished by its expertise, numerous patents, steady growth, and a workforce spanning roles from production operators to research scientists, the Lumibird Group currently employs over 1,000 people worldwide.

Firmly committed to sustainable development, the Lumibird Group contributes to the ecological and social transition by implementing an ambitious CSR policy.

To support our expanding operations, we are currently seeking candidates for our West Springfield, Massachusetts site.

Optical Engineer III supports the development, testing, troubleshooting, and productization of high‑power CW/QCW fiber laser systems for medical and industrial applications.

This role focuses on practical fiber laser development, including optical fiber handling, fiber preparation, splicing, laser assembly, optical testing, beam characterization, performance analysis, and product‑level troubleshooting. The ideal candidate will have strong hands‑on experience with optical fiber and laser systems, solid knowledge of fiber laser physics, and the ability to use optical and electrical test equipment to evaluate laser performance.

This position requires regular work with laser hardware, optical fibers, high‑power optical components, and test equipment. The engineer must be able to work independently, analyze technical issues in a structured manner, document results clearly, and help maintain an organized, safe, and efficient laser lab.

• This position has no supervisory responsibilities.

• Support the development, assembly, testing, and optimization of high‑power CW/QCW fiber laser systems and optical subassemblies.
• Perform optical fiber preparation, including stripping, cleaning, cleaving, splicing, routing, inspection, fiber protection, and use of related fiber handling equipment and tools.
• Work with fiber laser components such as active fibers, passive fibers, FBGs, pump combiners, fiber‑coupled diodes, delivery fibers, and high‑power fiber assemblies.
• Use optical and electrical test equipment such as power meters, optical spectrum analyzers, oscilloscopes, beam profilers, thermal sensors, current/voltage monitors, and similar instruments.
• Characterize laser performance, including output power, spectrum, efficiency, pulse behavior, power stability, thermal behavior, beam size, divergence, pointing behavior, and beam quality.
• Perform near‑field and far‑field beam profile measurements and analyze beam behavior under different operating conditions.
• Troubleshoot optical, fiber, thermal, electrical, and system‑level issues using a structured analytical approach, including test planning, data analysis, and root‑cause identification.
• Support testing related to back‑reflection sensitivity, optical feedback, thermal effects, mode behavior, long‑term stability, reliability, and high‑power laser failure modes.
• Support failure analysis, corrective actions, design improvements, process improvements, production transfer, and product repeatability.
• Prepare and maintain engineering documentation, including test reports, work instructions, test procedures, acceptance criteria, design evaluations, and failure analysis reports.
• Help maintain an organized, safe, and efficient laser lab, including proper storage of optical components, fibers, tools, fixtures, samples, and test equipment.

• Bachelor’s degree in Optical Engineering, Physics, Electrical Engineering, Photonics, or a related technical field.
• Minimum of 2 years of hands‑on experience with fiber optics, fiber lasers, laser systems, optical testing, or related photonics laboratory work.
• Experience with high‑power CW/QCW fiber lasers, thulium‑doped fiber lasers, or other rare‑earth‑doped fiber laser systems is preferred.

• Strong hands‑on experience with optical fiber handling, including stripping, cleaning, cleaving, splicing, routing, inspection, fiber…