National Central University

National Applied Research Laboratories

Chao-Yi Tai

Chii-Chang Chen

Ren-Young Liu

Szu-Yu Chen

Jui-Fen Chang

Sheng Hsiung Chang

Hao-Hao Wu

An optical fiber apparatus and a method of recovering radiation-induced-attenuation (RIA) onto a rare-earth-doped optical fiber under irradiation are provided in this disclosure. A light source is coupled to a rare-earth doped optical fiber. The light source emits a combination of mode locked pulsed light and non-mode locked quasi-continuous-wave light. The mode locked pulsed light are used to recover RIA onto the rare-earth doped optical fiber in real time, and the non-mode locked light are used to pump the rare-earth doped optical fiber as a gain medium. Each pulsed duration of the mode locked pulsed light is much shorter than operation duration of the non-mode locked light, such that an instantaneous power of the mode locked pulsed light exceeds a saturated pumping power required for the rare-earth doped optical fiber, so as to effectively elevate the core temperature of rare-earth doped fiber to achieve a confined photo-annealed recovery of RIA onto rare-earth doped fibers.

Recovering a rare-earth-doped optical fiber under irradiation

The present invention discloses a method for non-fluorescence higher harmonic generation ground state depletion super-resolution microscopy, it includes the following steps: providing an organic material unit, focusing excitation light and ground state depletion light, generating a higher harmonic signal, performing ground state depletion and performing microscopic imaging. With the implementation of the present invention, the stimulated electrons of the organic material remains majorly on the singlet (S) state or the triplet (T) state, instead of the ground (S) state, to provide modulation of the spatial distribution of the non-fluorescence signal, and make STED microscopy applicable to non-fluorescence signals to promote the resolution of the images.

Method for non-fluorescence higher harmonic generation ground state depletion super-resolution microscopy

Growing community of inventors

Taoyuan, Taiwan

Chao-Yi Tai