超快雷射之可調式液晶消色差波長板

Abstract

我們使用數個電控液晶(E7)樣品來組成消色差波長板，並且成功的應證了在波長為740nm~850nm之間消色差二分之一波長板的相位延遲為 。 另外，我們利用干涉式自相關器量測出液晶樣品基板的GDD值約為 。最後我們比較了脈衝雷射經過消色差波長板與零階非消色差波長板後的脈衝寬度，前者脈衝寬度較窄。

We use several liquid crystal (E7) cells to create achromatic wave plates and succeeded in confirming the phase retardation of the achromatic half wave plate is during the wavelengths 740nm~850nm. Moreover, we used interferometric autocorrelation to measure the GDD value of the substrate is about 97.48fs2. Finally, we compared the width of the pulses passing through achromatic wave plates and 0th order non-achromatic wave plates. The former is narrower while 0th order non-achromatic wave plates is wider.