Lars Søgaard Rishøj

Lars Søgaard Rishøj is a Senior Researcher at the Department of Electrical and Photonics Engineering, Technical University of Denmark (DTU), where he works within the Fiber Optics, Devices and Non-linear Effects group and contributes to the Centre of Excellence for Silicon Photonics for Optical Communications. He is based in Kgs. Lyngby, Denmark, and actively engaged in cutting-edge research in nonlinear fiber optics and photonic devices.

• Full Name: Lars Søgaard Rishøj
• Institution: Technical University of Denmark (DTU)
• Department: Fiber Optics, Devices and Non-linear Effects
• Email: lris@dtu.dk
• ORCID: 0000-0003-0810-3859

His research interests lie at the intersection of nonlinear optics and fiber photonics, with a strong focus on intermodal four-wave mixing, Bragg scattering, frequency conversion, and optical fiber sensing. He investigates higher-order mode propagation in large-core fibers and nonlinear effects in few-mode and tapered fibers, aiming to develop novel photonic devices for communication and sensing applications.

The recent publications reflect a consistent trend in harnessing nonlinear optical phenomena in specialty fibers for wavelength conversion, signal processing, and distributed sensing. Key themes include intermodal nonlinear interactions, dispersive wave generation, and the development of fiber-based sensors for voltage and strain. The work combines theoretical modeling with experimental validation, often leveraging advanced fiber designs such as step-index and few-mode fibers.

Lars Søgaard Rishøj is actively involved in supervising PhD students and leading research projects. He serves as main or co-supervisor in multiple PhD projects related to Raman fiber lasers, frequency conversion, and high-power nonlinear optics in large-core fibers. His collaborations span across DTU and involve close work with senior researchers like Karsten Rottwitt and Jesper Lægsgaard. Although no specific grants are detailed, his involvement in Centre of Excellence activities and multiple funded projects indicates active grant-supported research.

He is part of the research team within the Centre of Excellence for Silicon Photonics for Optical Communications, contributing to advanced photonics research. His work is closely integrated with experimental teams focusing on fiber design, nonlinear characterization, and optical sensing systems. The collaborative network includes experts in photonic crystal fibers, amplifier technology, and quantum photonics.