title: Diffractive catheter for ultrahigh-resolution spectral-domain volumetric OCT imaging.
abstract: We present a novel design for an endoscopic imaging catheter utilizing diffractive optics for ultrahigh-resolution optical coherence tomography (OCT) imaging at 800 nm. A diffractive microlens was developed to alleviate severe chromatic aberration when a broadband light source was employed at the 800 nm wavelength range. Combined with a home-built fiber rotary joint and a broadband Ti:sapphire laser, the imaging catheter achieved a lateral resolution of 6.2 μm and an axial resolution of 3.0 μm in air. The performance of the catheter was demonstrated by three-dimensional full-circumferential endoscopic OCT imaging of guinea pig esophagus in vivo.
authors.forename: Jiefeng
authors.initials: J
authors.lastname: Xi
authors.forename: Anqi
authors.initials: A
authors.lastname: Zhang
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Liu
authors.forename: Wenxuan
authors.initials: W
authors.lastname: Liang
authors.forename: Lih Y
authors.initials: LY
authors.lastname: Lin
authors.forename: Shaoyong
authors.initials: S
authors.lastname: Yu
authors.forename: Xingde
authors.initials: X
authors.lastname: Li
mesh_terms: D000818:Animals; D004724:Endoscopy; D004947:Esophagus / Q000166:cytology; D006168:Guinea Pigs; D021621:Imaging, Three-Dimensional; D041623:Tomography, Optical Coherence / Q000379:methods*