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Showing 1 to 20 of 54 for “"Isolators"”.
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Integrated optical isolators
Introduction: Optical isolators are important components in lasers. Their main function is to eliminate noise caused by back-reflections into these lasers. The need for integrated isolators comes from the continuing growth of telecommunication networks. Monolithic integration of isolators with …
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Passive vibration isolators with high-static-low-dynamic-stiffness
In many engineering applications there is need to reduce the level of vibrations that are transmitted from a source to a receiver. Amongst several different techniques, the most commonly adopted solution is to interpose an isolation mount between the source and the receiver. Ideally, a vibration …
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Evaluation of on-chip integration of magneto-optic isolators
… of on chip integration of magneto-optic isolators is reviewed. Two major categories of structural designs for waveguide isolator (nonreciprocal mode conversion and nonreciprocal phase shift) have both merits and short comings for integration. The advances in integration techniques and …
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Analysis of Buckled and Pre-bent Columns Used as Vibration Isolators
Vibrations resulting from earthquakes, machinery, or unanticipated shocks may be very damaging and costly to structures. To avoid such damage, designers need a structural system that can dissipate the energy caused by these vibrations. Using elastically buckled struts may be a viable means to …
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MITIGATING THE ADVERSE EFFECTS OF INTERNAL LATERAL IMPACTS IN STRUCTURES EQUIPPED WITH FRICTIONAL ISOLATORS
L'abstract è presente nell'allegato / the abstract is in the attachment
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Computational analysis of plasma actuation for control of shock-laden flows in scramjet isolators
… actuators for active flow control in scramjet isolators. A computational framework was developed to model internal supersonic flows with plasma actuation. The Reynolds-averaged Navier-Stokes (RANS) equations coupled with Menter’s Shear Stress Transport (SST) turbulence model were used to …
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Theory and design of integrated optical isolators and broadband couplers using Fresnel zone plates
… the theory and design of the integrated optical isolators. In the first part we propose, theoretically investigate, and numerically demonstrate a compact (less than 10[mu]m) broadband (more than 300nm) fiber-chip vertical coupler. The structure utilizes a Fresnel lens, or more advanced integrated …
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Internal Resonances in Vibration Isolators and Their Control Using Passive and Hybrid Dynamic Vibration Absorbers
Conventional isolation models deal with massless isolators, which tend to overestimate the isolator performance because they neglect the internal resonances (IRs) due to the inertia of the isolator. Previous researches on the IR problem is not adequate because they only discussed this problem in …
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A multiplexed feedback solution for isolated digital power supplies
… digital power supply systems. Several digital isolators used in existing applications can be reduced to one. The data transmission speed is greatly reduced. The communication protocol is DC-balanced; therefore pulse-transformer type digital isolators can be used resulting in further lower cost. …
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Vibration Isolation of a Horizontal Rigid Plate Supported by Pre-bent Struts
… In this research, four of these vibration isolators are used to support a rigid, square plate. The symmetric case is analyzed first. Then the plate has a center of mass which is located at some distance from the geometric center of the plate. When the system is subjected to vertical …
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Novel materials for silicon based photonics
… of broadband coherent light source and optical isolators. Chalcogenide glass stands out among the candidates for light generation and sensing due to its large non-linear figure of merit and wide transparency window in the IR spectral range, while magnetic garnet still presents the best device …
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Seismic Analysis and Response of Highway Bridges with Hybrid Isolation
… damage in strong earthquakes. In this technique isolators are only used at the abutments, and monolithic or pinned connections remain at the piers. Both full and hybrid isolation can be shown to reduce the demand on critical members such as columns and foundations, but hybrid isolation also …
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Ring Resonators Intergrating With Dichoric Materials And In Spin-valley Controlled Photonic Topological System
… components such as lasers, modulators, and isolators exhibit compactness without incurring significant losses.</p> <p>Non-reciprocal devices represent a valuable addition to photonic circuits, enabling the creation of unidirectional waveguides that function as optical isolators, preventing …
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Magneto-optical oxide thin films and integrated nonreciprocal photonic devices
Nonreciprocal photonic devices including optical isolators and optical circulators are indispensible components in present day optical communication systems. Although highly desired by the fast development of silicon photonics, monolithically integrating such devices on a semiconductor platform has …
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Two Dimensional Analysis of Vibration Isolation of Rigid Bar Supported by Buckled or Pre-bent Struts
… static deflection than traditional vibration isolators such as springs or rubber mounts, but can also exhibit a low axial stiffness when dynamic excitation is introduced. Three models consisting of buckled or pre-bent struts serving as vibration isolators which support a rigid bar are examined …
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Brillouin scattering induced transparency: Coherent optomechanical interaction leading to slow light and non-reciprocal light transmission
… and laser cutting. Today, all optical isolators that are commercially available are constructed from magneto-optic materials that non-reciprocally rotate the polarization of counter-propagating light. In free-space and fiber optics, Faraday isolators perform extremely well with the …
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Effect of cereal type and commensal bacteria on availability of methionine sources and intestinal physiology in pigs
… SI. Among the gnotobiotic pigs, 8 pigs (2 isolators) were monoassociated with a bacteria closely related to Providencia spp. and 16 pigs (4 isolators) were monoassociated with Enterococcus faecium (EF). Species of bacterial contaminant and diet composition did not affect residual MET or …
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Design methodologies for controlling vibrations in buildings
… to the design and suitability of vibration isolators for various environments. It contains a discussion of the past, present and future of vibration isolation associated with buildings. Analysis and design examples are provided to illustrate the design methodology.
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Dynamics and Control for Vibration Isolation Design
… systems either. It is commonly suggested that isolators should be designed with a low-frequency mount. That is, the isolator frequency should be much lower than any of the system frequencies. It is shown that these isolators tend to perform best in an overall sense; however, mount frequencies …
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Evaluation of strategies for seismic design
… these two methods are discussed. Major types of isolators and damping devices are presented. A comparative analysis of the seismic response of a fixed base structure, a base isolated and a structure with damping devices is performed with the use of SAP2000.
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