title: Double-clad fiber with a tapered end for confocal endomicroscopy.
abstract: We present a double-clad fiber coupler (DCFC) for use in confocal endomicroscopy to reduce speckle contrast, increase signal collection while preserving optical sectioning. The DCFC is made by incorporating a double-clad tapered fiber (DCTF) to a fused-tapered DCFC for achromatic transmission (from 1265 nm to 1325 nm) of > 95% illumination light trough the single mode (SM) core and collection of > 40% diffuse light through inner cladding modes. Its potential for confocal endomicroscopy is demonstrated in a spectrally-encoded imaging setup which shows a 3 times reduction in speckle contrast as well as 5.5 × increase in signal collection compared to imaging with a SM fiber.
authors.forename: Simon
authors.initials: S
authors.lastname: Lemire-Renaud
authors.forename: Mathias
authors.initials: M
authors.lastname: Strupler
authors.forename: Fouzi
authors.initials: F
authors.lastname: Benboujja
authors.forename: Nicolas
authors.initials: N
authors.lastname: Godbout
authors.forename: Caroline
authors.initials: C
authors.lastname: Boudoux
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