Abstract

Double-clad fibers (DCFs) are versatile waveguides comprising a single-mode core surrounded by a multimode inner cladding. DCFs are increasingly used for multimodal biomedical applications, such as imaging or therapy, for which the core is typically used for coherent illumination and the inner cladding to support a concurrent modality. Double-clad fiber couplers (DCFCs) were developed to allow the separation or combination of these signals in a robust and efficient fashion. In this paper, we review the operation and types of DCFCs in addition to current biomedical applications.

Radiometric model for coaxial single- and multimode optical emission from double-clad fiber

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Double-clad fiber coupler for endoscopy

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Double-clad fiber coupler for partially coherent detection

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Laser tissue coagulation and concurrent optical coherence tomography through a double-clad fiber coupler

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Asymmetric double-clad fiber couplers for endoscopy

Wendy-Julie Madore, Etienne De Montigny, Olivier Ouellette, Simon Lemire-Renaud, Mikael Leduc, Xavier Daxhelet, Nicolas Godbout, and Caroline Boudoux
Opt. Lett. 38(21) 4514-4517 (2013)