Cr:Forsterite-laser-based fiber-optic nonlinear endoscope with higher efficiencies
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Updated: Jul 5, 2026
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
Ming-Che Chan1, Shi-Wei Chu, Chien-Hung Tseng
1Department of Electrical Engineering and Graduate Institute of Electro-Optical Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China.
Abstract:
We demonstrate a beam-scanning nonlinear light endoscope based on a flexible fiber bundle. Excited with a femtosecond Cr:Forsterite laser, the degradation in multiphoton multiharmonic excitation efficiency due to the pulse-broadening effect is significantly reduced without utilizing any external devices. The system resolution has been characterized to be 5.4 microm in the two-photon fluorescence endoscope, limited by the sampling theory. Finally, several image examples have been given.
