Asymmetric double-clad fiber couplers for endoscopy

作者：Madore Wendy Julie; De Montigny Etienne; Ouellette Olivier; Lemire Renaud Simon; Leduc Mikael; Daxhelet Xavier; Godbout Nicolas; Boudoux Caroline^*

来源：Optics Letters, 2013, 38(21): 4514-4517.

DOI：10.1364/OL.38.004514

We present an asymmetric double-clad fiber coupler (A-DCFC) exploiting a disparity in fiber etendues to exceed the equipartition limit (<= 50% extraction of inner cladding multi-mode light). The A-DCFC is fabricated using two commercially available fibers and a custom fusion-tapering setup to achieve >70% extraction of multi-mode inner cladding light without affecting (>95% transmission) single-mode light propagation in the core. Imaging with the A-DCFC is demonstrated in a spectrally encoded imaging setup using a weakly backscattering biological sample. Other applications include the combination of optical coherence tomography with weak fluorescent or Raman scattering signals.

• 出版日期2013-11-1