Paper 13344-20
Paper 13344-20
Enhancing stability and radiation resilience of phase-shifted fiber Bragg gratings for high-power and space applications
28 January 2025 • 10:50 AM - 11:10 AM PST | Moscone Center, Room 206 (Level 2 South)
Abstract
Phase-shifted fiber Bragg gratings (PS-FBGs) are increasingly important in laser line filtering, optical communications, and fiber sensing due to their sensitivity and stability needs. In transmission, PS-FBGs with narrow bandwidths are sensitive to input power, affecting central wavelength stability. This study introduces stable 1 GHz and 4 GHz filters UV-written in polarization-maintaining and single-mode fibers at 1.55 µm. Using an optimized technique to reduce non-resonant absorption and improve thermal dissipation allow to achieve stability up to 100 mW, reducing sensitivity by 10 to 20 times. Radiation tests show minimal wavelength shift and no spectral distortion up to 8.5 kGy X-ray exposure, affirming suitability for space applications.
Presenter
Laurent Lablonde
Exail SAS (France)
Laurent Lablonde was born in 1969. He graduated from the University of Limoges (France), in 1992, the M.Sc. degree (DEA) in Microwave and Optical Communications, and the Ph.D degree in Optoelectronics, in 1996, from the University of Limoges on Gain Non-linearties in Semiconductor Optical Amplifier. This research was carried out in CNET, research center of France Telecom, under the direction of Jean-Claude Simon. In 1997, he joined the founder team of HighWave Optical Technologies, a spin-off from France Telecom. He participated in the development of fiber Bragg gratings and fused components. He joined iXFiber, at the beginning, in 2006, where he has been working as Product Line Manager and Department Manager of the fiber-optic components activity. Then, he worked as Development Manager at iXblue and now at Exail in the same topic and covering applications like fiber laser, fiber sensing and telecommunications. He has published over sixty communications as author and co-author.