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: A heralded single-photon source with a much lower level of unwanted background photons in the output channel is presented by using the herald photon to control a shutter in the heralded channel using a simple field programable gate array controlled optical switch.
Abstract: We present a heralded single-photon source with a much lower level of unwanted background photons in the output channel by using the herald photon to control a shutter in the heralded channel. The shutter is implemented using a simple field programable gate array controlled optical switch.
68 citations
TL;DR: In this article, a multi-bit optical buffer memory using 1.55-μm polarization bistable vertical-cavity surface-emitting lasers (VCSELs) is presented.
Abstract: We demonstrate a novel all-optical buffer memory using 1.55-μm polarization bistable vertical-cavity surface-emitting lasers (VCSELs). A one-bit data is stored as one of two orthogonal polarization states of a VCSEL in this memory. The polarization state is transferred from the VCSEL to another VCSEL which is optically connected in cascade as a shift register. A 4-bit optical buffer memory is constructed using two sets of the shift-register memory connected in parallel. These results show the technical feasibility of multi-bit optical buffer memory.
67 citations
Patent•
15 Feb 1989
TL;DR: In this article, a new group of fiber optic switching devices that use layers of surface-established ferroelectric liquid crystals (FLCs) as the switching media are described. But the switches are not suitable for direct optical signals.
Abstract: This invention comprises a new group of fiber optic switching devices that use layers of surface-established ferroelectric liquid crystals (FLCs) as the switching media. In each of the devices light impinges upon the ferroelectric liquid crystal a an angle of 90 degrees (normal incidence) with the surface plane. Each FLC gives 0 degrees or 90 degree optical rotation, depending upon the polarity of the electric voltage applied. A series of polarizing beam splitters are used to separate unpolarized light into its s and P polarization components. After ferroelectric liquid crystal switching, other polarizing beam splitters are used to direct the s and p light to output optical paths. The switches discussed include voltage controlled 2×2, 1×4, 1×6, 1×8, 4×4 and dual plane devices that use one or more layers of surface stabilized ferroelectric liquid crystals to direct optical signals.
67 citations
TL;DR: In this article, a 238/spl times/238 beam-steering optical cross-connector constructed using surface micromachined mirrors is described. But the performance of the beamforming was not evaluated.
Abstract: This letter describes a 238/spl times/238 beam-steering optical cross connect constructed using surface micromachined mirrors. Its innovative optical configuration resulted in superior optical performance, achieving a mean fiber-to-fiber insertion loss of 1.33 dB and a maximum insertion loss for all 56 644 connections of 2 dB.
67 citations
TL;DR: In this article, a multibranch waveguide structure with localized optical nonlinearity is proposed for all-optical logic gates, which can function as AND and OR logic gates.
Abstract: We propose all-optical logic gates by using a multibranch waveguide structure with localized optical nonlinearity. By simply setting nonlinear media in the selected output guides and properly launching the input power, the numerical results show that the proposed all-optical waveguide structure could really function as AND and OR logic gates.
67 citations