Design of Graded Index Fiber Lenses for OCT Applications








A fiber-optic probe, for optical coherence tomography (OCT) applications, typically includes a short section of graded index (GRIN) fiber fused onto a single-mode (SM) fiber. The GRIN fiber acts as a lens to focus the output of the SM fiber and to collect the reflected light from the sample. In this paper we use a beam propagation method (BPM) to analyze the output beam characteristics such as beam radius and working distance, and then compare these with measured results. With this tool we can design a GRIN fiber lens to achieve a long working distance without degrading the system performance.

OFS studied beam propagation method (BPM) to analyze the output beam characteristics, working distance, and coupling efficiency, and then compared these with measured results.

Dr. Jie Li
Senior Manager
Fiber and Cable Engineering

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