Three-dimensional nonlinear imaging using a 3D MEMS enabled compact fibre endoscope

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Three-dimensional nonlinear imaging using a 3D MEMS enabled compact fibre endoscope

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/219679

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Title: Three-dimensional nonlinear imaging using a 3D MEMS enabled compact fibre endoscope
Author(s): Kang, Hong; Morrish, Dru; Wu, Lei; Jia, Baohua; Xie, Huikai; Bao, Hongchun; Gu, Min
Abstract: Recently, fibre-optical nonlinear endoscopy has been increasingly attractive for early recognition and diagnostics of gastrointestinal tract cancers due to the non-invasive, flexible and miniaturised feature. To reduce the volume of the system, several miniaturised scanning mechanisms have been employed, including a two-dimensional (2D) microelectromechanical system (MEMS) mirror [1] and a PZT actuator. However, these scanning devices only perform on one dimension or two dimensions. To achieve a three-dimensional (3D) imaging, another scanner such as a bulk one-dimensional (1D) scanning stage or an actuator is usually used to move samples axially which seriously obstructs the system size reduction and simplification. To overcome this disadvantage, a 3D MEMS mirror is applied for the 3D scanning in this paper. Figure 1 is the experimental setup for a 3D MEMS enabled fibre endoscope. A double-clad photonic crystal fibre (DC-PCF) is one of the key components for a compact endoscope because it has a large core for single-mode delivery of excitation laser beam and a large inner cladding with a high numerical aperture (NA) for efficient signal collection at separate wavelengths. To examine the effectiveness of the miniaturised endoscopic system, two-photon fluorescence images of 10 μm microspheres in three dimensions have been obtained at a laser excitation wavelength of 800 nm with a repetition rate of 80 MHz and a pulse width of 80 fs (Spectra Physics, Maitai).
Publication type: Conference paper
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Paper presented at the Focus on Microscopy 2010 Conference, Shanghai, China, 28-31 March 2010
Publication year: 2010
Keyword(s): 3D microelectromechanical system; 3D nonlinear imaging; Fibre-optical nonlinear endoscopy; Scanning mechanisms;
Publisher: Focus on Microscopy
Publisher URL: http://www.focusonmicroscopy.org/2010/