Abstract

We present numerical studies on bend-induced effective single-mode large-mode area fibers with various refractive index profiles: step index, parabolic, and triangular and hyperbolic for laser applications. We report the fiber with effective mode area as large as 1530 μm² for 110-μm all-solid core diameter using triangular refractive index profile, in single-mode regime. We also report the fiber with parabolic refractive index profile, 70-μm core diameter with effective single-mode area of 1170 μm². Development of novel active very large nanostructured core fiber with dedicated gradient index profile is discussed. Owning to nanostructurization, the extremely large core in the all-solid fiber can be obtained and used in a laser system to diminish undesirable nonlinear effects and increase the output power level with diffraction-limited beam quality. The nanostructurization method allows us to break the limits of classical manufacturing methods and opens new opportunities in precise shaping of the refractive index distribution.

© 2018 IEEE

Development of pedestal-free large mode area fibers withTm³⁺ doped silica nanostructured core

Pavel Peterka, Jan Aubrecht, Dariusz Pysz, Marcin Franczyk, Ondřej Schreiber, Michal Kamrádek, Ivan Kasik, and Ryszard Buczyński
Opt. Express 31(26) 43004-43016 (2023)

Design and analysis of dual-shape-core large-mode-area optical fiber

Ajeet Kumar and Vipul Rastogi
Appl. Opt. 50(25) E119-E124 (2011)

Single-mode large-mode-area laser fiber with ultralow numerical aperture and high beam quality

Kun Peng, Huan Zhan, Li Ni, Xiaolong Wang, Yuying Wang, Cong Gao, Yuwei Li, Jianjun Wang, Feng Jing, and Aoxiang Lin
Appl. Opt. 55(35) 10133-10137 (2016)

Bend-resistant large-mode-area photonic crystal fiber with a triangular-core

Xin Wang, Shuqin Lou, and Wenliang Lu
Appl. Opt. 52(18) 4323-4328 (2013)

Detailed study of bending effects in large mode area segmented cladding fibers

Shaoshuo Ma, Tigang Ning, Jing Li, Li Pei, Chuanbiao Zhang, and Xiaodong Wen
Appl. Opt. 55(35) 9954-9960 (2016)