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Topic: Optical resonator

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World Intellectual Property Organization When the wavelength of the optical signal propagating though the input waveguide 9 is the same as the ring resonator's resonance wavelength, the signal couples from the input waveguide 9 to resonator 5 and from the resonator 5 into the output waveguide 11. Light propagating in the input waveguide 1 with a wavelength on resonance with the resonance wavelength of the microcavity resonator 5 is coupled to the microcavity resonator 5, and from the microcavity resonator 5 the light is coupled to the output waveguide, by way of example, nl, for transmission therefrom. A thermally tunable resonator according to claim 1, further comprising: a layer of a leveling material covering the resonator body and the trench; wherein the leveling material does not cover at least a portion of the disk through which the first electrode is in electrical contact with the forward biased junction. www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/38905.010531&ELEMENT_SET=DECL

OPTICAL CAVITY The resonator in a laser is an optical cavity. cavidad resonante óptica (resonant cavity), cavidad resonante (acoustic trap, cavity, cavity resonator, microwave resource cavity, resonant cavity, resonant chamber, resonant element, resonator, rhumbatron, tuned cavity, waveguide resonator), cavidad óptica (resonant cavity). Translations for "OPTICAL CAVITY"; alternative meanings/domain in parentheses. www.websters-dictionary-online.net /definition/english/op/optical+cavity.html

Publications Mookherjea, S, Yariv, A. "Optical pulse propagation and holographic storage in a coupled- resonator optical waveguide." Phys. Mookherjea, S, Cohen, DS, Yariv, A. "Nonlinear dispersion in a coupled-resonator optical waveguide." Opt. Yariv, A. Coupled-wave formalism for optical waveguiding by transverse Bragg reflection." Opt. www.cco.caltech.edu /~aphyariv/pubs.html

Lasers (Science Tracer Bullet - Science Reference Services, Libraryof Congress) A carefully aligned laser mirror is added at each end of the collection of atoms to form an optical resonator, in which the lightwave can bounce back and forth many times. In the process, the optical cavity or resonator forces the excited atoms to radiate in phase, and concentrates the light to stimulate the emission of laser radiation. Optical feedback elements allow a beam of radiation to either pass once through the laser medium (i.e., as in a laser amplifier) or bounce back and forth repeatedly through the laser medium, amplifying the light (i.e., as in a laser oscillator). lcweb.loc.gov /rr/scitech/tracer-bullets/laserstb.html

Patent 4953176: Angular optical cavity alignment adjustment utilizing variable distribution cooling Bending of the plasma tube can be decoupled from alignment of the optical cavity by using an external resonator, that is, a resonator where the mirrors are not connected to the plasma tube. The present invention relates to alignment of a laser optical cavity when mirrors, or other beam guiding elements, are attached to a structural member, such as a plasma tube, and thermal gradients in the structural member cause bending of the structural member, and resulting misalignment of the cavity. At least one optical element is mounted on the structural member for guiding the laser beam along the optical path. www.freepatentsonline.com /4953176.html

Photonic Frequency Synthesis and Control with Whispering Gallery Mode Resonators Because of high refractive index contrast, radiative losses are negligible when the radius of the resonator exceeds several tens of wavelengths, and the Q is limited by material losses that are extremely small in optical materials. Despite their high performance, these devices are preliminary examples of new signal processing functions that can be based on optical WGM micro-resonators. Preparation of resonators with predetermined resonance frequencies is very difficult with the melt technique. www.ieee.org /organizations/pubs/newsletters/leos/Oct03/mode.html   (1345 words)

Cornell Devises All-Optical Switch - Photonics.com Feature Articles    Lipson's optical switch is based on a ring resonator, a device already familiar to photonics researchers. The all-optical switch is described in the Oct. 28 issue of the journal Nature by Lipson and members of the Cornell Nanophotonics Research Group, which she directs. At present, information that travels at the speed of light through optical fiber must be converted at the end into electrical signals that are processed on conventional electronic chips, then in many cases converted back into optical signals for retransmission, an extremely slow process. www.photonics.com /XQ/ASP/url.readarticle/artid.257/QX/readart.htm   (703 words)

Lasers (Science Tracer Bullet - Science Reference Services, Libraryof Congress) In the process, the optical cavity or resonator forces the excited atoms to radiate in phase, and concentrates the light to stimulate the emission of laser radiation. A carefully aligned laser mirror is added at each end of the collection of atoms to form an optical resonator, in which the lightwave can bounce back and forth many times. Optical feedback elements allow a beam of radiation to either pass once through the laser medium (i.e., as in a laser amplifier) or bounce back and forth repeatedly through the laser medium, amplifying the light (i.e., as in a laser oscillator). www.loc.gov /rr/scitech/tracer-bullets/laserstb.html   (1291 words)

Andrew Weily's Homepage Analysis of HE -Mode Dielectric Resonator Slot Coupling Using a Fourth-Order Spatial Nonuniform Mesh FDTD Algorithm," Microwave and Optical Technology Letters, Vol. Full Two-Port Analysis of Coaxial Probe Fed TE and HE Mode Dielectric Resonator Filters using FDTD," Microwave and Optical Technology Letters, Vol. A planar resonator antenna based on a woodpile EBG material," IEEE Trans. www.physics.mq.edu.au /~aweily   (1265 words)

Analytical Approaches to the Description of Optical Microresonator Devices - Hammer, Hiremath, Stoffer (ResearchIndex) Abstract: Optical ring resonators are commonly discussed on the basis of a frequency-domain model, that divides a resonator into coupler elements, ring cavity segments, and the straight port waveguides. We look at the assumptions underlying this model and at its implications, including remarks on reciprocity/symmetry arguments, the general power transfer characteristics, the resonance condition, the spectral distance and width of the resonances, the quantities that describe the resonator... 3 Fundamentals of Optical Waveguides (context) - Okamoto - 2004 citeseer.lcs.mit.edu /633539.html   (1265 words)

Optical annular resonators based on radial Bragg and photonic crystal reflectors The sensitivity of the resonator characteristics to fabrication errors is analyzed quantitatively. A ring resonator based on Bragg reflection is studied in detail. Closed form expressions for the field and dispersion curves for radial Bragg gratings and photonic crystals based resonators are derived and compared to FDTD simulations. www.opticsexpress.org /abstract.cfm?URI=OPEX-11-21-2736   (1265 words)

Dispersion (optics) The overall dispersion of the optical resonator is a major factor in determining the duration of the pulses emitted by the laser. In the technical terminology of gemology, dispersion is the difference in the refractive index of a material at the B and G Fraunhofer wavelengths of 686.7 nm and 430.8 nm and is meant to express the degree to which a prism cut from the gemstone shows fire or color. In optics, dispersion is a phenomenon that causes the separation of a wave into components with different frequencies, due to a dependence of the wave's speed on its frequency. www.sciencedaily.com /encyclopedia/dispersion__optics_   (1265 words)

Jens Nöckel's intro page Coupling to such a resonator is very inefficient unless another optical component is brought extremely close to the rim so as to overlap with the evanescent near field. Extremely small, high-quality resonators can be fabricated by exploiting total internal reflection at the interface between a circularly symmetric dielectric and the surrounding air; see Fig.1 which shows the cross-sectional intensity distribution of a long-lived photonic mode in a dielectric disk. The classical ray dynamics in general deformed resonators exhibits a coexistence of periodic, quasiperiodic and chaotic trajectories which is difficult to disentangle by ray-tracing. darkwing.uoregon.edu /~noeckel/arc_intro.html   (569 words)

Technique for locking a laser diode to a passive cavity - Patent 5555253 By employing a degenerate resonator as the passive resonator in the present invention, the loss in mode-matching optics may be eliminated, thereby increasing both the input power to the passive resonator and the percentage of the radiation emitted by the laser diode that can be returned to it as optical feedback. The longitudinal modes 16 of the passive resonator have a frequency separation of approximately c/2nL.sub.passive, where c is velocity of light, n is an average index of refraction within the resonator and L.sub.passive is the distance between the two mirrors (not shown in FIG. A faraday isolator is not needed in the embodiment of FIG. www.freepatentsonline.com /5555253.html   (9400 words)

96913.011220&ELEMENT_SET=DECL An external electrical signal is used to modulate the optical phase in the resonator to shift the whispering-gallery mode condition and hence the output coupling. The whispering gallery modes essentially exist near the equator of the sphere, the resonator 110 may be not a whole sphere but a portion of the sphere near the equator that is sufficiently large to support the whispering gallery modes. been observed with sapphire resonators at cryogenic temperatures. www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/96913.011220&ELEMENT_SET=DECL   (4035 words)

Optical Cavity, wwwOptical Cavity .com An optical cavity, also opitcal cavity known as a resonator, is a cavity OpticalCavity.cim with walls which will reflect optcal cavity electromagnetic... Optical nonlinear dynamics with cold atoms in a cavity Optical nonlinear potical cavity dynamics with cold atoms in a cavity OpticalCavity.co This paper presents the nonlinear otical cavity dynamics of laser cooled and trapped OpticalCavity.xom cesium atoms placed inside an optical cavity and interacting...arxiv.org/abs/quant-ph/9801054 Quasioptic dielectric tetrahertz cavity: Coupled through optical tunneling. nald.com /Optical_Cavity   (4035 words)

Definition: optical cavity Note: The resonator in a laser is an optical cavity. optical cavity: A region bounded by two or more mirrors that are aligned to provide multiple reflections of lightwaves. www.atis.org /tg2k/_optical_cavity.html   (4035 words)

Optical Cavity (Resonator) : Photon inc. Glossary of Terms Optical Cavity (Resonator): Photon inc. Glossary of Terms www.photon-inc.com /glossary/OpticalCavity.shtml   (4035 words)

Growth dynamics of noise-sustained structures in nonlinear optical resonators Lugiato, S. Barnett, A. Gatti, I. Marzoli, G. Oppo, H. Wiedemann, "Quantum aspects of nonlinear optical patterns," Coherence and Quantum Optics VII (Plenum Press, New York, 1996), p 5. Haelterman, G. Vitrant, "Drift instability and spatiotemporal dissipative structures in a nonlinear Fabry-Perot resonator under oblique incidence," J. Opt. The existence of macroscopic noise-sustained structures in nonlinear optics is theoretically predicted and numerically observed, in the regime of convective instability. www.opticsexpress.org /abstract.cfm?URI=OPEX-3-2-63   (513 words)

Defects boost optical communications (October 2000) - News - PhysicsWeb They found that the defect behaved as an optical resonator with a resonant frequency that depends on its size. Japanese scientists have created a device that could revolutionise optical communications by paving the way for all-optical circuits. Photons travelling through the waveguide with a frequency that matches that resonant frequency are 'trapped' by the defect and re-radiated perpendicular to the surface of the waveguide. physicsweb.org /article/news/4/10/1   (432 words)

Optical cavity An optical cavity, also known as a resonator, is a cavity with walls which will reflect electromagnetic waves( light). Optical Microsystems in Silicon Based on a Fabry-Perot Resonance Cavity: Application for Spectral Analysis of Visible Light This will allow standing wave modes to exist with little loss outside the cavity. www.freeglossary.com /Optical_cavity   (432 words)

US06982823-20060103.html a resonator comprising an optical fiber and a first and second reflecting means, the first and second reflecting means being disposed on both sides of the optical fiber; the output signal light is generated by a nonlinear optical phenomenon between the generated light having the fourth wavelength and the input signal light and is output from the second reflecting means. an optical pump source for outputting optical pump light having a third wavelength; and www.uspto.gov /web/patents/patog/week01/OG/html/1302-1/US06982823-20060103.html   (143 words)

DRUM: Item 1903/269 It is the goal of this thesis to propose, study, and demonstrate a new class of compact optical switches based on semiconductor microring resonators. A detailed theoretical analysis of the nonlinear behavior of the microring resonator shows that, due to the resonance effect, there is an enhancement of the overall switching efficiency by up to the third power of the cavity finesse. Both materials are analyzed and compared in terms of switching energy requirement, nonlinear coefficients, speed limitation and ease of fabrication. hdl.handle.net /1903/269   (182 words)

Research Yang, and J. Leger, “Three-mirror resonator with aspheric feedback mirror for laser spatial mode selection and mode shaping,” My research experience lies in optoelectronics with focus on optical sensors, advanced optics and laser systems, and various techniques for micro optics and integrated optics fabrication. Yang, and J. Leger, “Properties of a phase-conjugate etalon mirror and its application to laser resonator spatial mode control,” www.ece.umn.edu /users/yangzh/Research.htm   (295 words)

Vertically coupled optical resonator devices over a cross-grid waveguide architecture - US Patent 6411752 An optical material 1710 is attached to the piston 1700, and the piston varies the proximity between the material and the ring resonator 1702. Optical resonators are vertically coupled on top of bus waveguides, and are separated from the waveguides by a buffer layer of arbitrary thickness. Unlike vertically coupled ring resonators of the prior art, in which the ring and bus waveguides were both buried, or both air-clad, the invention seeks to have bus waveguides that are buried and ring waveguides that are air-clad. www.patentstorm.us /patents/6411752.html   (295 words)

Prof. A. E. Siegman: List of Publications Siegman and H. Miller, "Unstable optical resonator loss calculations using the Prony method," Appl. Siegman, "Nonlinear optical effects: an optical power limiter," Appl. Nemes and A. Siegman, "Measuring all ten second order moments of a general astigmatic light beam using a rotating anamorphic optical system,'' Optical Society of America Annual Meeting (October 1993). www.stanford.edu /~siegman/aes_bibliography.html   (295 words)

SPIE Bookstore Optical ring-resonators could be used to synthesize filters with low crosstalk and flat passbands. In this paper, we propose a novel scheme of a symmetrically parallel-coupled ring resonator array with coupling apodisation. For a 50 - 100 GHz DWDM applications, four rings is found to be the best choice for array size. bookstore.spie.org /index.cfm?fuseaction=DetailPaper&ProductId=504535&coden=   (295 words)

MICRORESONATORS AS BUILDING BLOCKS FOR VLSI PHOTONICS: Abstracts of the lectures Optical ringresonators are commonly discussed on the basis of a frequency-domain model, that divides a resonator into coupler elements, ring cavity segments, and the straight port waveguides. Following a general introduction dedicated to the required properties of the optical polymers, the first part gives a survey of the polymers used in the field of passive optical components and the second one deals with the synthesis and the characterization of polymers with NLO properties. The experimental characterisation techniques of the nonlinear optical properties of polymers will be described. w3.uniroma1.it /cattedra_michelotti/invited1.htm   (295 words)

Minos press release The software tool, which will be released later this year, enables the design of the next generation sensors for security and life sciences applications and compact switches and filters for telecom applications, all based on compact optical ring resonators. Today C2V and The University of Twente announce a licensing agreement concerning a simulation engine that is specifically dedicated for full 3D simulation of optical ring resonators. The most commonly used resonator structures inherently require full 3D analysis to properly describe light propagation in these devices. www.bbv.nl /company/news/minos.shtml   (295 words)

Optics Letters - Archives Optical breakdown versus filamentation in fused silica by use of femtosecond infrared laser pulses Cascaded second-order effects in the femtosecond regime in beta -barium borate: self-compression in a visible femtosecond optical parametric oscillator Precise frequency measurements of atomic transitions by use of a Rb-stabilized resonator ol.osa.org /browse.cfm?journal=3&volume=,28,8,2,27,20,24&issue=,20-14,28-17   (295 words)

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