A novel proximal scanning micro-endoscope based on a rectangular fiber

Guan-Yu Zhuo^1,2*, Ming-Che Chan³

¹Institute of New Drug Development, China Medical University, Taichung, Taiwan
²Integrative Stem Cell Center, China Medical University Hospital, Taichung, Taiwan
³Institute of Photonic Systems, College of Photonics, National Chiao-Tung University, Tainan, Taiwan

* Presenter:Guan-Yu Zhuo, email:zhuo0929@gmail.com

We demonstrate a novel proximal scanning micro-endoscope based on a rectangular fiber. This new demonstration will overcome the three entangled issues in current nonlinear endo-microscopes, including the femtosecond pulse broadening, the pixel-like images, and the miniaturization of scanning mirrors in the distal end. In this novel micro-endoscope, a proximal scanner, instead of a miniaturized distal scanner, is used. Thus, the complexity in packaging the distal end is greatly reduced. Second, the mode-field diameter in this endoscope is larger than that in fiber bundles; thereby, the fiber-nonlinearity resulting in dispersion that causes pulse broadening is avoided. Third, no pixel-like image occurs since the wave-vectors can be continuously delivered in this endoscope. Our preliminary results show that the advanced proximal scanning micro-endoscope will have a substantial impact on biomedical and clinical applications.

Keywords: laser scanning microscopy, nonlinear endoscope, wave-vector delivery, proximal scanning, rectangular fiber