光纖通訊為了追求提升單一光纖之通道流量，會將一定範圍內之頻寬加以切割成更多頻道，而要將多項訊號混合分離到光纖，必須使用波長多工器（WDM）或是時間多工器（TDM）的觀念，鑑於目前波長多工器資料傳輸能力越來越強，而一般接收端並不需如此龐大的資料流，於是許多研究試圖整合波長多工器與時間多工器，假如光纖傳輸資料經過波長多工器分光之後，擁有M個頻道，欲將資料流按時間分配給N個接收端。則相當於幫每個頻道裝 的光學開關元件，因此需要裝 個光學開關元件，以經濟效益來看相當不經濟，因此本論文將針對如何將分光與光學開關整合在同一個元件上進行探討，由於凹面型光柵同時具有角色散能力與成像聚焦在焦點上的功能，因此不需在額外增加透鏡，並且由凹面型光柵的折射元件特性可以知道，如果改變凹面鏡曲率中心則聚焦點也會隨之改變，因此本論文將討論如何以微機電技術設計、製造、測試一變焦凹面型光柵來同時達成分光與光學開關功能。 With the continuous advance in optical technology, Wavelength division multiplexing (WDM) network will play an important role in wide area backbone networks. Optical wavelength switching, compared with optical packet switching, is a more mature and more cost-effective choice for optical switching technologies. Besides, the technology of time division multiplexing (TDM) in optical communication networks has been working smoothly for a long time. WDM system can full utilize fiber bandwidth and increase transmission capacity that is the most acceptable structure in recent years. In this thesis, we present improved system performance using zoom concave grating. There are two classes of important research issues. The first class focuses on the concave grating can supply WDM with dispersion compensation and focusing image. The N-order diffracted signal light by the blazed grating is directed to the fiber of output and focused on spot size. The second class of problems focuses on the radius of curvature zoom. The change of curvature was made over to the focus point. The effect equals to a channel switch. This study is important since the performance of existing networks can be improved by distribution of data flow rate properties of WDM technologies.
