A novel proximal scanning micro-endoscope based on a rectangular fiber
Guan-Yu Zhuo1,2*, 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