Paper 13344-14
Paper 13344-14
A cladding light stripper with ultra-low backscattering (Invited Paper)
28 January 2025 • 8:30 AM - 9:00 AM PST | Moscone Center, Room 206 (Level 2 South)
Abstract
I review the recent investigation results of our group’s on the design and fabrication of a cladding light stripper (CLS) with ultra-low backward scattering. The relationship between the roughness of the cladding surface and the backscattering of cladding light for the periodically grooved CLSs was investigated using a ray tracing method. A periodically grooved CLS structure with multiple unetched sections of a suitable length was found to efficiently suppress backscattering and verify its efficacy through numerical simulations. A CLS with 6-cm length of an LMA DCF with core and cladding diameters of 10 and 125 um was fabricated by using a hydrogen fluoride (HF)-free chemical etching technique considering fabrication and environmental safety. It was shown that the cladding attenuation was ~21 dB and the backward beam scattering level was much lower than that of commercially available CLSs.
Presenter
The Univ. of Seoul (Korea, Republic of)
Ju Han Lee received the Ph.D. degree from the Optoelectronics Research Centre, University of Southampton, U.K.. He was a senior technical staff with the Korea Institute of Science and Technology. He was a JSPS Research Fellow with the University of Tokyo, Japan. He was a visiting scholar to University of Adelaide, Australia. Since 2007, he is Professor with University of Seoul, South Korea. His research interests include rare-earth-doped fiber lasers/amplifiers, ultrafast fiber lasers, nonlinear fiber optics, and optical communications. He is the author or coauthor of more than 200 international journals and 180 technical conference papers. He was a Vice President of Optical Society of Korea for 2021-2023. He is a Fellow of Optica and a Senior Member of the IEEE Photonics Society. He is a founder of Kromanet Inc., which is a company specialized in fiber-optic components based on hydrogen fluoride-free chemical etching technologies, in particular, cladding power strippers.