Topic
Optical switch
About: Optical switch is a research topic. Over the lifetime, 28538 publications have been published within this topic receiving 351176 citations.
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TL;DR: The authors present a bound on the minimum number of wavelengths needed based on the connectivity requirements of the users and the number of switching states in a network using a combination of circuit switching, wavelength routing, and frequency changing.
Abstract: The authors consider optical networks using wavelength division multiplexing, where the path a signal takes is determined by the network switches, the wavelength of the signal, and the location the signal originated. Therefore, a signal is routed through a combination of circuit switching and wavelength routing (assigning it a wavelength). They present a bound on the minimum number of wavelengths needed based on the connectivity requirements of the users and the number of switching states. In addition, they present a lower bound on the number of switching states in a network using a combination of circuit switching, wavelength routing, and frequency changing. The bounds hold for all networks with switches, wavelength routing, and wavelength changing devices. Several examples are presented including a network with near optimal wavelength re-use. >
78 citations
TL;DR: In this paper, a total internal reflection waveguide switch with an X junction was designed and fabricated by using the thermo-optic effect of polyimide materials, and the switching power with the current electrode was 132 mW, which can be reduced to 20-30 mW with an optimized design together with electroplating to form a thick conducting path.
Abstract: A total-internal-reflection waveguide switch with an X junction was designed and fabricated by using the thermo-optic effect of polyimide materials. Experimental results show that the crosstalk is below −28 dB at the wavelength of 1.55 μm. The switching power with the current electrode is 132 mW, which can be reduced to 20–30 mW with an optimized design together with electroplating to form a thick conducting path.
78 citations
Patent•
30 Jun 2000TL;DR: In this article, a hybrid integrated circuit is provided that has a monocrystalline substrate such as silicon and a compound semiconductor layer such as gallium arsenide or indium phosphide.
Abstract: A hybrid integrated circuit is provided that has a monocrystalline substrate such as silicon and a compound semiconductor layer such as gallium arsenide or indium phosphide An optical communications port may be formed on the hybrid integrated circuit Electrical equipment may be provided that includes electrical components At least a given one of the components may be a hybrid integrated circuit Data used for the operation of one of the given integrated circuit may be provided to the given integrated circuit through the optical communications port on that integrated circuit The data may be loaded rapidly in real time due to the wide bandwidth of the optical communications port
78 citations
TL;DR: In this article, a 2×2 microfluidic-based optical switch is proposed and demonstrated, made of an optically clear silicon elastomer, Polydimethylsiloxane (PDMS), using soft lithography.
Abstract: A 2×2 microfluidic-based optical switch is proposed and demonstrated. The switch is made of an optically clear silicon elastomer, Polydimethylsiloxane (PDMS), using soft lithography. It has insertion loss smaller than 1 dB and extinction ratio on the order of 20 dB. The device is switching between transmission (bypass) and reflection (exchange) modes within less than 20 ms
78 citations
12 Jun 1994
TL;DR: A heuristic algorithm for effectively assigning a limited number of wavelengths among the access stations of a multihop network wherein the physical medium consists of optical fiber segments which interconnect wavelength-selective optical switches is presented.
Abstract: The authors present a heuristic algorithm for effectively assigning a limited number of wavelengths among the access stations of a multihop network wherein the physical medium consists of optical fiber segments which interconnect wavelength-selective optical switches. Such a physical medium permits the limited number of wavelengths to be re-used among the various fiber links, thereby offering very high aggregate capacity. Although the optical connectivity among the access station can be altered by changing the states of the various optical switches, the resulting optical connectivity pattern is constrained by the limitation imposed at the physical level. They also present and study two admission control schemes, used to admit or reject requests for virtual connections. The heuristic is tested on a realistic traffic model, and the call blocking performance of new requests for virtual connections is studied through extensive simulations and compared against the blocking performance of an ideal infinite capacity centralized switch (lowest possible call blocking caused exclusively by congestion on the finite capacity user input/output links, never by the switch fabric itself). Surprisingly, they find that, for a wide range of parameters, the blocking performance of the lightwave network is almost the same as that of the ideal centralized switch. From these results, they conclude that the heuristic algorithm is effective and the admission control scheme is efficient. >
78 citations