光子晶體光纖波長轉換器及其光源在非線性光學顯微術上的應用

Abstract

我們提出了一個高效能並且微型化的近紅外光飛秒切倫可夫輻射與自相位調變光源，並首度應用在非線性光學顯微鏡上。此特殊的光源是由1.03 μm飛秒雷射作為泵浦源，耦合進光子晶體光纖，透過波長轉換機制所產生，微型化，且具有很好的靈活性和波長轉換效率。老鼠大腦的血管網路和尾巴的肌腱組織這兩者的影像將會由此光源呈現。由於此特殊光源的高功率輸出，高脈衝能量，極佳的波長轉換效率，優異的空間安排，和簡單的鑰匙操作開關，結合種種優點，在未來能被廣泛的應用在臨床非線性顯微鏡上並取代指標性的商用雷射。

We reported a record high power and compact near-infrared fiber-optic femtosecond Cherenkov radiation & Self Phase Modulation source and its new application on nonlinear light microscopy for the first time. The high power femtosecond light source was generated by 1.03 μm femtosecond pulses from a portable diode-pumped laser and a photonic crystal fiber as a compact, flexible, and highly efficient wavelength convertor. Sectioned nonlinear light microscopy images from mouse brain blood vessel network and rat tail tendon were then performed by the demonstrated light source. Due to the advantages of its high average output power, high pulse energy, excellent wavelength conversion efficiency, compactness, simplicity in configuration, and turn-key operation, the demonstrated femtosecond light source could thus be widely applicable as an alternative excitation source to commercial lasers for future clinical nonlinear microscopy.