The linewidth performance of all-fiber, linear-cavity Fabry–Perot structures based on fiber Bragg gratings operating at 2-μm band has been investigated numerically. The output linewidth performance of two symmetrical and asymmetrical cavities has been theoretically studied and comprehensively compared. The numerical analysis is based on the transmission matrix method with the simplified parameters. The simulation results show that cavity lengths, cavity lengths ratio, grating lengths, grating lengths ratio, as well as index modulation depths, affect the output linewidth performance. The tolerance ability of the asymmetrical structure is first proposed and investigated under 1 mm accuracy, and single-frequency output can be realized by properly adjusting the properties of the proposed composite linear cavity structure.
With the data service exploding, it gives increasing demand on network broadband, Wavelength Division Multiplex
(WDM) is introduced into the communication networks, which can solve the broadband problem. This paper presents a
novel technology to construct the hybrid model architecture for WDM systems. In order to improve network efficiency
and decrease network cost, the different network model should be connected for each other, so, how to realize the
connection of the different network model is the hotspot of the research work on optical network. The recent
development in WDM technology has led to a significant increase in the available transmission capacity in wide area
networks. These networks are no longer limited by transmission bandwidth, but rather by the processing capability of
electronic switches, routers, and multiplexers in the network. The hybrid connection methods have four types with
Generalized Multiprotocol Label Switching (GMPLS) signaling. Simulation to the hybrid model is also studied. The
results indicate the novel scheme is an effective method.
With the Internet Protocol (IP) being the dominant protocol for new optical network services, there is increasing pressure to optimize the network infrastructure and protocols for IP traffic. This paper presents a technology for constructing a novel architecture for IP over photonic systems. WDM network has been launched by the concept of wavelength routing. The principle is that high-speed data flows, which consist of many time-division multiplexed channels, are associated with specific optical wavelengths. Thus, they are routed through the optical network by means of their wavelengths. Thus, wavelength routing consents the realization of OXCs working in an efficient way. However, MPLS-based forwarding is still an electronic solution. Therefore, even though MPLS needs to establish a closed domain to utilize a new lower-layer technology, it is still useful to incorporate optical technology herein to further increase throughputs for large-scale Internet networks. Moreover, provisioning wavelength capabilities based on MPLS has emerged, that is , multi-protocol lambda switching (MPλS). This system tries to merge the functionalities of the wavelength switching, SONET mux/demux, and IP routing into one layer, and is sometimes known as the concept of optical MPLS and MPLambdaS. Its extension Generalized-MPLS(GMPLS) is also discussed.