The frequency difference of the bidirectional laser is controlled by birefringence which is introduced in the ring laser cavity. A computersimulated ring resonator depicting continuous wave input at resonance. The software rp resonator is a particularly flexible tool for analyzing and optimizing laser resonators. Publishers pdf, also known as version of record includes final page, issue and volume. Semiconductor optical amplifier soafiber ring laser and. Summary a detailed, cognizant account of numerous crucial aspects of optical microring resonators amr s. If the propagation length around the ring is an integral number of wavelengths. High finesse devices have a small fwhm and a strong intensity buildup in the ring when in resonance. Tsigaridas1 department of physics, school of applied mathematical and physical sciences, national technical university of athens, zografou campus, gr15780 zografou, athens, greece abstract in this work the behavior of optical micro ring resonators. The structure of this open resonator is given in fig. The distributions of the mode field excited in three types of the ring resonatorsbased trapping systems microring, microdisk and slot ring and the corresponding optical forces on the nanoparticles are. Three wavelengths of light are used between the ont and the olt optical line terminal. A study on refractive index sensors based on optical microring resonators georgios n. The silicon waveguide is 600 nm wide and 295 nm thick with 500nmthick ce.
A generic ring resonator con sists of an optical waveguide which is looped back on itself, such that a resonance occurs when the optical path. The normalized transmission spectra for singlering and dualring configurations have been investigated by using the twodimensional finitedifference timedomain fdtd technique in a square lattice dielectricrod photoniccrystal structure. Shanmuga sundar research scholar alagappa chettiar college of engineering and technology karaikudi, tamilnadu, india l. Silicon microring resonators photonics research group. This book fills the need for a cohesive and comprehensive treatment of the subject, given its importance and the proliferation of new research in the field. In its simplest form, an optical ring resonator consists of a straight waveguide and a ring waveguide. Optical ring resonator filter model fdtd simulation with. An optical ring resonator made in silicon on insulator waveguides soi was entirely simulated with the photon design mode solver fimmwave and its 3d propagation tool fimmprop. The field of microring resonator research has seen tremendous growth over the past decade, with microring resonators now becoming a ubiquitous element in integrated photonics technology. Localized optical manipulation in optical ring resonators.
Mansoor and others published analysis of optical ring resonator adddrop filters find, read and cite all the research you need on researchgate. An optical ring resonator is a set of waveguides in which at least one is a closed loop coupled to some sort of light input and output. We propose a tunable optical trapping system for nanoparticles based on generating standing wave by coupling two coherent beams into a ring resonator in opposite directions, respectively. After propagation around the ring waveguide, some light couples back to the straight waveguide and interferes with the incident light. Pdf resonance wavelength of integrated optical ring resonator. We use the finite element method fem to simulate the performance of the proposed resonator.
A reverse bias of 10v is applied to the junction and shows the possibility to achieve a high modulation depth. Optical adddrop filters based on photonic crystal ring. For simplicity, we consider a 2d concentric ring resonator i. In this paper, we used a basic structure of photonic crystal ring resonators and designed all optical logic gates which are working using the kerr effect. Proposal and characterization of ring resonator with bandgap of silicon. Photonic crystal based ring resonators are best choice for designing alloptical devices. The concepts behind optical ring resonators are the same as those behind whispering galleries except that they use light and obey the properties behind constructive interference and total internal reflection. Narmadhadevi assistant professor sri ramakrishna institute of technology coimbatore, tamilnadu, india d.
Optical waveguide ring resonator is the coresensing element in rmog. Crosstalk and signal integrity in ring resonator based optical adddrop multiplexers for wavelengthdivisionmultiplexing networks by riyadh dakhil mansoor, b. For the application to a frequencydomain sensor, the authors have studied a novel optical fiber ring laser. Discussion we simulated the optical characteristics of the fabricated ring resonator. Circular optical microresonators contents ring resonator theory for the sake of further understanding, consider the typical abstract setting of a horizontally coupled circular microresonator as sketched in figure 1. We proved that circular pcrr based optical filters provide better performance than others. All structured data from the file and property namespaces is available under.
Micro ring resonator as memory high optical ring resonators are used to selectively filter, switch or modulate the light beams. The resulting phase diagram is asymmetric with respect to the cavity detuning and can be described by the coupling of two atomic modes with one optical mode. First we consider a simple model, the so called fabry perot resonator of two plane mirrors. The ont converts fiberoptic light signals to copperelectric signals. Rp photonics encyclopedia laser resonators, laser cavities. The proposed gates consisted of upper and lower waveguides coupled through a resonator which was designed for dropping of special wavelength. Two straight waveguides are evanescently coupled to the cavity. An ont optical network terminal is a media converter that is installed by verizon either outside or inside your premises, during fios installation. When light of the resonant wavelength is passed through the loop from input waveguide, it builds up in intensity over multiple roundtrips due to construct. The laser wavelengths are much shorter than this box can realistically be. Photonic crystal ring resonator based optical filters. An allfiberring resonator has been constructed using a single strand of singlemode optical fiber and a directional coupler. A theoretical analysis of a tuneable optical filter is presented by proposing an optical ring resonator orr using photonic crystal fiber pcf as the resonance loop. Rp photonics encyclopedia optical resonators, cavities.
Optical ring resonator and many more non linear material. An optical cavity, or an optical resonator, may be described as an arrangement of mirrors that produce a standing light wave resonator. So, you can put this system inside a fibre optical machzehnder interferometer to convert this sensitive phase shift to an amplitude shift that is highly sensitive to the ring s optical path length. Performance analysis of different micro ring resonators. These can be, but are not limited to being, waveguides. Pdf microring resonators mrr define as filters with characteristics similar to fabryperot filters. Files are available under licenses specified on their description page. Of the resonator is exactly a whole number of wavelengths. An optical resonator basically consists of two opposing mirrors. For the proper build up of oscillations essential is that the amplification between two consecutive. Fimmprop was used to model the coupling region and the fimmwave bend solvers were used to. Emphasis has been on the principles and applications of ultracompact photonic crystal ring resonators. Microscope picture of two parallel cascaded microring resonators at resonance obtained with an infrared ccd camera.
This page was last edited on 8 january 2017, at 15. Design of a microring resonator electrooptical modulator. Ring resonator as the optibpm layout the solution for the fourth example is more info. It is shown that the tuneability of the filter is mainly achieved by changing the. Select ring resonator object and change in property view. Pdf analysis of optical ring resonator adddrop filters. A simple linear optical resonator with a curved folding mirror top and a fourmirror bowtie ring resonator bottom. A study on refractive index sensors based on optical micro. The normalized transmission spectra for single ring and dual ring configurations have been investigated by using the twodimensional finitedifference timedomain fdtd technique in a square lattice dielectricrod photoniccrystal structure. This schematic contains a full 2channel optical link consisting of 2 ring resonator modulators at the transmitter and 2 ring resonator filters at the receiver. Design and fabrication of racetrack optical ring resonator.
I didnt get where and how the interference will take place and what we. The concepts behind optical ring resonators are the same as those behind. Pdf analysis of optical ring resonator researchgate. Pages in category resonators the following 8 pages are in this category, out of 8 total. Yig on the top to have reasonable nonreciprocal effect and low optical loss. In this paper, the design of a microring resonator electrooptical modulator using a pn junction embedded in a rib waveguide is reported. Rp photonics also offers competent resonator design services, leading to stateofthe art designs. The obtained results may be utilized in designing optical adddrop filters used in wdm communication systems. We formulate the compound ring resonator theory with complex field.
Optical ring resonator filter model 2d and 3d fdtd and fetd simulations with omnisim software. In general cases birefringence applied to a ring laser is reciprocal effect and no phase difference generates be. Optical resonators provides a detailed discussion of the properties of optical resonators for lasers from basic theory to recent research. When the ring itself has a small amount of loss, you get a sensitive dependence of the output amplitude on the ring s optical path length. Performance analysis of different micro ring resonators based. Optical ring resonator, photonic crystal fiber, tuneable optical filter, optical fiber. Derivation of the resonator finesse in terms of fiber and directional.
Pdf optical ring resonator as an optical filter and optical switch. Finally, several of the more promising applications of silicon ring resonators are discussed. Circular optical microresonators contents ringresonator theory for the sake of further understanding, consider the typical abstract setting of a horizontally coupled circular microresonator as sketched in figure 1. Proposal and characterization of ring resonator with sharp. With a radial magnetic field applied to the ring isolator, it exhibits 9db isolation at resonance in the 1550 nm wavelength regime. A windowed cosine excitation is pumped in the bottom dielectric straight waveguide and as. Mar 12, 2012 2d fdtd for ring resonator structure version 1. Optical resonator it is easiest to consider the resonator as an enclosed box with highly reflective walls. Optical ring resonator 3d simulation with fimmwave and fimmprop software. For example, it can be used to calculate and minimize the alignment sensitivity of laser resonators.
A high finesse optical resonator for cavity qed experiments. Optical ring resonator software cad simulations for soi. Tsigaridas1 department of physics, school of applied mathematical and physical sciences, national technical university of athens, zografou campus, gr15780 zografou, athens, greece abstract in this work the behavior of optical microring resonators. Laser beams and resonators, taking into account the wave nature of the beams but. A generic ring resonator consists of an optical waveguide which is looped back on itself, such that a resonance occurs when the optical path length of the resonator is exactly a whole number of wavelengths. We present here an optical adddrop filter adf design based on ultracompact photonic crystal ring resonators pcrrs. A study on refractive index sensors based on optical micro ring resonators georgios n.
An optical resonator can be made from bulk optical components, as shown in figure 1, or as a waveguide resonator, where the light is guided rather than sent through free space bulkoptical resonators are used for solidstate bulk lasers, for example. Transmission characteristics of tuneable optical filters. Design and fabrication of racetrack optical ring resonator yuichiro tanushi coe researcher, masaru wake graduate school of advanced sciences of matter, m2, shin yokoyama professor research center for nanodevices and systems, graduate school of advanced sciences of matter 1. We also demonstrate tunable optical true time group delay via a fiber ring resonator and show that a high finesse is unnecessary. Ring resonator based integrated photonic circuits pure. Osa localized optical manipulation in optical ring resonators. This topic has taken on new excitement due to the potential for using compact rings in siliconbased photonic circuits 3. Optical transmission characteristics of fiber ring resonators. Transfer function of optical waveguide ring resonator in. All structured data from the file and property namespaces is available under the creative commons cc0 license.
Linear or standingwave resonators figure 1, top are made such that the light bounces back and forth between two end mirrors. At resonance, completely destructive interference can be obtained, with no transmitted light. Finite difference time domain and finite element time domain are ideal tools to model optical ring resonator filters and optical disk resonator filters of relatively small dimensions. Their transverse mode properties depend on the overall setup including the length of air spaces, and mode sizes can vary significantly along. Osa optical adddrop filters based on photonic crystal ring. Silicon microring resonatorbased alloptical digitalto. Each halfring pdk element uses smatrix data automatically generated by the smatrix and pdk generation utility in fullwave. The figure of merit of this compact depletion modulator is estimated to be lp. Performance analysis of different micro ring resonators based on optical delay lines p. Optical filters are crucial passive components for modern optical. This makes the optical ring resonator an ideal notch filter, blocking the light at the resonant wavelength. Creating a zeroorder resonator using an optical surface. Crosstalk and signal integrity in ring resonator based.
The influences of the characteristic parameters of the pcf on the filter response have been analyzed under steadystate condition of the orr. Optical ring resonator fdtd animation waveguide youtube. Research target signal delay in metal interconnection becomes. Dec 23, 2016 photonic crystal based ring resonators are best choice for designing all optical devices.
The concepts behind optical ring resonators are the same as those. Silicon ring isolators with bonded nonreciprocal magneto. Optical field will propagate into the ring and propagate to the coupling region. In this case, the fiberoptic ring resonator is replaced by a ring integrated. Before having the fdtd component and any simple possibility to use a multidirectional optical component based on a modified sdata approach, we have to analyze some structures suitable for the fdtd like the ring resonator by the means already available. Here we demonstrate the propagation phenomena in a double optical ring resonator structure. Therefore high f devices are suitable for applications were high intensities in the cavity are. Optical cavity definition, properties and applications. Optical ring resonator notch filter comsol multiphysics. With the proposed tuneability scheme for optical filter, we achieved an fwhm of 1. The concepts behind optical ring resonators are the same as those behind whispering galleries except that they use light and obey the properties behind constructive interference and total internal.
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