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19 June 1998 Large nonblocking multiwavelength cross-connects based on fiber Bragg gratings for WDM networks
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Proceedings Volume 3420, Optical Fiber Communication; (1998)
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan
Multi-wavelength cross-connects (WXCs) will play a key role to provide more reconfiguration flexibility and network survivability in wavelength-division-multiplexing (WDM) transport networks. In this paper, we utilize three different fiber-Bragg-grating (FBG) based P-type, S-type, and N-type building blocks with optical circulators and related control devices for constructing large rearrangeably non-blocking N X N WXCs. The P-type building block is composed of certain 'parallel' FBG-element chains placed between the control device of two large mechanical optical switches (OSWs). The S-type building block consists of a 'series' of FBG elements and the control device of 2 X 2 OSWs. The non-switched N-type building block includes a 'series' of FBG elements with appropriate stepping motor or PZT control devices. Large N X N WXC structures, with minimum number of required constitutive elements, based on a three-stage Clos network are then constructed. We investigate their relevant characteristics, compare the required constitutive elements, and estimate the dimension limits for these WXC architectures.
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Yung Kung Chen, Chien-Chung Lee, Yuan-Kuang Tu, Shien-Kuei Liaw, and Chi-Hsiung Chang "Large nonblocking multiwavelength cross-connects based on fiber Bragg gratings for WDM networks", Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998);

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