In response to the development of a next-generation networking (NGN), generalized multi-protocol label switching (GMPLS) technology is required for automatically switched optical network (ASON). Reconfigurable optical add-drop multiplexer (ROADM) is an indispensable device for the ASON, and the dense wavelength division multiplexed (DWDM) signals can be transmitted through the network under the management of the network administrator to configure dynamic customer needs and the desired quality of service (QoS). The ROADM can also increase the efficiency of utilizing the existing capacity of the optical fiber lines and can reduce or waive to set up additional optical fiber lines. This thesis studies a ROADM based on the arrayed waveguide grating (AWG) and the fiber Bragg grating (FBG) to overcome the issue that the current ROADM cannot process input signal channels that is greater than the wavelength channels of the AWG. All kinds of ROADM have been proposed and realized through different optical devices. Among these, hybrid optical circulator and FBG based ROADM is more attractive because of its low crosstalk and polarization insensitivity.
However, in the previous study, the structure needs an optical circulator and a fiber Bragg grating per wavelength. If there are 10 wavelengths to be used, you need 10 groups of the optical circulator and the fiber Bragg grating corresponding to each wavelength. This situation not only increases the number of components, but also increases the insertion loss of the system. In this master thesis, we focus on to reduce number of circulators and gratings while obtaining the best results.
At the same time we think about whether this structure is the best, and thus try to change the asymmetrical architecture to compare. The final results show that the asymmetrical structure is better, but it does not realize optical cross-connect (OXC). Therefore for the choice, we must choose the best results or the exchangeability of the symmetrical structure.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0717112-151301 |
| Date | 17 July 2012 |
| Creators | Huang, Kang-Hua |
| Contributors | Hung-Wen Chang, Hidenori Taga, Chin-Ping Yu, Cheng-Mu Tsai |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717112-151301 |
| Rights | user_define, Copyright information available at source archive |
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