Realization of all-optical routing device in DWDM system

[[abstract]]本論文提出一個應用於高密度分波多工系統(Dense wavelength-division multiplex DWDM)中，可隨意加入/取出全光頻譜波長訊號之可重組態光信號塞取多工器(Reconfigurable optical add/drop multiplexer ROADM)，利用陣列波導光柵(Array waveguide grating AWG)其週期循環波長特性的路由規則，每一對通道中相鄰兩波長訊號將有較大的頻譜空間可供應用，配合可調式布拉格光纖光柵(Fiber Bragg grating FBG)濾波波長的調變，反射欲取出之網路波長訊號至取出埠，且同時可反射區域性波長訊號至輸出埠來達成加入/取出機制。當輸入網路波長訊號欲直接通往輸出埠而無需被取出時，由於陣列波導光柵週期循環波長特性的路由規則，對於同一對通道中的兩相鄰波長訊號間有較大的隔離頻寬，因而布拉格光纖光柵之濾波中心波長有較大的頻寬可應用來調變使得輸入波長訊號不會被布拉格光纖光柵反射頻譜所干擾，透過調整布拉格光柵光纖之濾波中心波長遠離輸入陣列波導光柵所濾之波長，就可讓輸入波長訊號直接通往輸出埠。本論文主要目的是要改善現有光信號塞取多工器存在的一些問題，提供通用多重協定標籤交換機制更具彈性的全光纖通訊網路。此可重組態光信號塞取多工器將可加入/取出所有的波長訊號而無需額外一組相同元件來完成，進而節省成本支出，且提供一個更具彈性的多重光波長通道的塞取架構。[[abstract]]This paper is to propose a reconfigurable optical add/drop multiplexer (ROADM) that is applied to add/drop the arbitrary wavelength channel coming from the network in the dense wavelength-division multiplex (DWDM) system According to the cyclic filtering property of the array-waveguide grating (AWG) each input/output pair of channel of AWG has much wider bandwidth to separate the wavelength channels in each pair of AWG channels Associating with the tunable fiber Bragg grating (FBG) and the AWG in this paper to realize the function that the tunable FBGs reflect the desire wavelength channels coming from the network into the drop port as well as the add wavelength channels from the local node When we want to pass the wavelength channels coming from the network through the output port of this type of ROADM directly the Bragg wavelength is just tuned away the wavelengths that are the AWG filtering wavelength in each channel With the AWG cyclic filtering property the proposed RAODM can arbitrary add and drop the wavelength channels by using the tunable FBGs without interfering adjacent wavelength channels in the same AWG channe