在本論文中，結合布拉格光纖光柵、微光學開關及三埠光迴旋器，我們提出應用於可回復式光波長塞取多工器及光訊號交換器之新型光學開關設計。藉由布拉格光纖光柵、微光學開關及三埠光迴旋器的組合，可以瞭解在高密度波長分工的網路系統中，如何對一組多波道傳輸訊號做取出及增加或著是訊號間換相交換的動作。此具有波長選擇性之可回復式光波長塞取多工器及光訊號交換器，提供光纖網路系統具有更高容量、更優越之設計彈性與存活性，擴充光纖網路規模與應用價值。
在此所提出之系統架構，以光學準直器來作為兩光纖準直及對位之元件。在光波長塞取多工器及光訊號交換器架構中，將討論和分析光訊號之嵌入損失特性及訊號間能量損失的同等性。然後光波長塞取多工器及光訊號交換器之操作原理也將加以探討；最後我們再提出光波長塞取多工器之改良架構，其將改善原有系統之能量損失特性。
本系統架構具有串聯特性，可將原來較少的通訊波道設備串接成具更多波道的架構，此特性將簡化原有光波長塞取多工器及光訊號交換器之系統元件及設計。

A novel dynamically selective optical add/drop multiplexer (OADM) and optical cross-connect (OXC) configurations for dense wavelength division multiplexed (DWDM) networks are proposed. Our devices are based on fiber Bragg gratings (FBGs), microoptical switches and optical circulators. Multiple channels add/drop and/or cross-connect can be realized according to the arrangement of the optical switches, fiber Bragg gratings and optical circulators. The selective OADM and OXC devices could provide more reconfigurable flexibility, high-capacity, and survivability in DWDM networks.
In our system, collimators are used in coupling between two single-mode fibers. Insertion loss characteristics and equalization of the output power in OADM and OXC will be discussed. Then, we will compare our configurations and operation principles of the OADM and OXC with other existing OADM and OXC ones.

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