What are ring resonators used for?

Because of their advantages of low cost and easy fabrication, ring resonators are used in many applications such as filters, oscillators, mixers, baluns, hybrids, magic Ts, couplers, and antennas. In addition, they have been successfully used to measure the phase velocity and dispersion of a microstrip line.

What is micro ring resonator?

Introduction. Optical waveguide device like micro-ring resonator (MRR) is basically a ring waveguide acting as the resonant cavity with one or two bus waveguides acting as input and output ports. The coupling mechanism involved in this device is the evanescent coupling between ring and adjacent bus waveguide [1].

How does ring resonator work?

In general a ring resonator consists of a looped optical waveguide and a coupling mechanism to access the loop. When the waves in the loop build up a round trip phase shift that equals an integer times 2π, the waves interfere constructively and the cavity is in resonance.

What is resonance splitting?

Resonance splitting☆ The occurrence of the pole near the resonance appears accidental within the single-channel framework. The sum of the widths of the double resonance peaks approximates the width of the single resonance which would have been obtained had the extra pole been absent.

What is the radius of ring resonator?

It depends on the material you used. For example in metal based ones, the radius of ring is ~500 nm. In graphene ones, 20~120 nm. You can search “plasmonic metal or graphene ring resonators.

What are ring resonators made of?

Researchers at MIT and Singapore University of Technology (SUTD) have demonstrated a micro ring resonator made of amorphous silicon carbide with the highest quality factor to date. The resonator shows promise to be used as an on-chip photonic light source at the infrared telecom wavelength of 1,550 nanometers.

What is frequency splitting?

Frequency splitting is a phenomenon in wireless power transfer (WPT) system when the coupling distance is less than the splitting point, the load power changes from a single-peak curve to a double-peak curve driven by two non-intrinsic resonant frequencies.

Why have a split ring resonator?

A split-ring resonator (SRR) is an artificially produced structure common to metamaterials. Their purpose is to produce the desired magnetic susceptibility (magnetic response) in various types of metamaterials up to 200 terahertz. A single cell SRR has a pair of enclosed loops with splits in them at opposite ends.

How does a frequency divider work?

A regenerative frequency divider, also known as a Miller frequency divider, mixes the input signal with the feedback signal from the mixer. frequency is amplified and fed back into mixer.

What is frequency shifter?

Frequency Shifter is a special effect that shifts all frequencies by the same amount. The Frequency Shifter’s defining characteristic is to transform inputs to sound more dissonant, metallic or ‘FM-like’ (Frequency Modulation).

What is the formula of volume of ring?

The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm.

What are the advantages of silicon microring resonators?

Silicon microring resonators (MRRs) are very popular for many applications because of the advantages of footprint compactness, easy scalability, and functional versatility. Ultra-compact silicon MRRs with box-like spectral responses are realized with a very large free-spectral range (FSR) by introducing bent directional couplers.

What kind of light is a micro ring resonator used for?

The resonator shows promise to be used as an on-chip photonic light source at the infrared telecom wavelength of 1,550 nanometers. Ordinary daylight will pass through a window unaltered, in a process called linear transmission, but the same light passing through a prism will split into a rainbow of colors.

How are optical ring resonators used in the real world?

This basic property can be used to create a sort of mechanical sensor. If an optical fiber experiences mechanical strain, the dimensions of the fiber will be altered, thus resulting in a change in the resonant wavelength of light emitted. This can be used to monitor fibers or waveguides for changes in their dimensions.

Who are the researchers of silicon carbide ring resonators?

Researchers led by MIT Materials Research Laboratory Research Scientist Anuradha M. Agarwal fabricated the amorphous silicon carbide ring resonators, and researchers at SUTD led by Associate Professor Dawn T.H. Tan analyzed the device’s linear and nonlinear properties.