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Furukawa Review No.31

Development of Ultra-Compact Highly Nonlinear Fiber Modules

Masanori Takahashi, Yu Mimura, Yuki Taniguchi, Jiro Hiroishi, Masateru Tadakuma, Ryuichi Sugizaki, Misao Sakano and Takeshi Yagi


Highly nonlinear fiber (HNLF) is a key component holding great promise in applications in the all-optical signal processing devices, broadband light sources,pulse compressors etc., which are essential to high-speed transmission systems.Improvements in HNLF functionality have been realized in recent years, but there is a need for more compact modules when these fibers are to be accommodated.

In this paper we provide a theoretical discussion of the limits of reducing cladding diameter using the finite element method (FEM), and have fabricated fiber with a cladding diameter of 51µm. This fiber shows satisfactory characteristics in tests for mechanical strength and environment performance, and delivers ample reliability while fitting into coin-sized modules. Using prototype ultra-compact modules that we fabricated, we carried out supercontinuum (SC) light generation tests and have confirmed satisfactory characteristics.

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