本論文利用鈉銀離子交換的技術製作光波導基板，然後利用雷射直寫技術製作長週期光柵，並藉由顯微系統研究光波導經過光柵的分光情形。在理論上模擬光波導在光柵中因為包層模式下所產生的折射行為，並指出包覆層折射係數對於折射光影響的重要性。在實驗上我們成功地看到光在經過光柵後所產生的顏色變化，然而我們不同週期的光柵之間的顏色變化沒有明顯的分別。我們將其歸因於光柵週期的區別不夠大。;This paper uses sodium-silver ion exchange technology to make optical waveguide substrates, and then uses laser direct writing technology to make long-period gratings, and uses a microscope system to study the light splitting of the optical waveguide after passing through the grating. Theoretically simulate the refractive behavior of the optical waveguide in the grating due to the cladding mode, and point out the importance of the refractive index of the cladding layer on the refracted light. Experimentally, we have successfully seen the color changes produced by light after passing through gratings. However, there is no obvious difference in the color changes between our gratings with different periods. We attribute this to the fact that the grating period is not sufficiently different.
