31 results about "Optical ring resonators" patented technology

Embodiments herein describe a method for selectively filtering different wavelengths of optical signals received from an optical channel using cascaded ring resonators, each of the cascaded ring resonators having a first ring and a second ring. The first ring has a varying waveguide width along its length configured to form a first waveguide width portion and a second waveguide width portion, the first waveguide width portion having a greater width than the second waveguide width portion. The second ring has a varying waveguide width along its length configured to form a third waveguide width portion and a fourth waveguide width portion, the fourth waveguide width portion having a greater width than the third waveguide width portion. The method further connects receivers to respective cascaded ring resonators, each of the receivers having a photodetector configured to differentiate between the optical signals.

Embodiments disclosed herein include an apparatus that includes a substrate with a first optical waveguide within the substrate, an optical ring resonator within the substrate, and a second optical waveguide within the substrate. In an embodiment, the first optical waveguide and the second optical waveguide are offset from each other in a vertical direction and a horizontal direction. In an embodiment, the optical ring resonator is between the first optical waveguide and the second optical waveguide in the horizontal direction.

This technology provides the ability to measure temperature over a wide temperature range within a chamber. [Solution] The temperature measurement system according to the exemplary embodiment comprises a sensor substrate, a mounting table, and a measuring device. The sensor substrate includes a base substrate, an optical ring resonator provided on the base substrate, and a waveguide provided on the base substrate and optically coupled to the optical ring resonator. The measuring device includes a laser oscillator that inputs laser light into the waveguide of the sensor substrate placed on the mounting table, and a spectrometer that receives reflected light of the laser light propagating through the waveguide and output from the waveguide.

The invention discloses a method and a system for generating a tunable flat-topped spectrum based on a Flokey singular point. The method comprises the following steps: forming two types of supermodes alternately arranged on a frequency axis by using a pair of coupled optical ring resonators; applying periodic dynamic complex modulation including real and imaginary components to the resonator; configuring the modulation frequency to be matched with the super-mode interval so as to construct a periodically quenched non-Hermite frequency lattice on the synthetic frequency dimension; and adjusting modulation parameters, and driving the quasi-energy band of the crystal lattice to present a linear dispersion relationship at the singular point, thereby generating the flat-topped spectrum. According to the method, the intensity and the broadening speed of the flat-topped spectrum are linearly controlled by adjusting the imaginary part modulation amplitude, and the flat-topped frequency comb formed by a single supermode is obtained by extracting signals at a specific moment in a modulation period. According to the method, flexible electric control tuning of the spectrum form, the broadening speed and the modal component is realized, the system can work under the weak non-Hermite condition, and the practicability and integration of the system are improved.

Embodiments herein describe a method for selectively filtering different wavelengths of optical signals received from an optical channel using cascaded ring resonators, each of the cascaded ring resonators having a first ring and a second ring. The first ring has a varying waveguide width along its length configured to form a first waveguide width portion and a second waveguide width portion, the first waveguide width portion having a greater width than the second waveguide width portion. The second ring has a varying waveguide width along its length configured to form a third waveguide width portion and a fourth waveguide width portion, the fourth waveguide width portion having a greater width than the third waveguide width portion. The method further connects receivers to respective cascaded ring resonators, each of the receivers having a photodetector configured to differentiate between the optical signals.

Optical resonator (1) having a dielectric optical waveguide (2) comprising a guide input (3) for receiving light, a guide output (4) for outputting light, and a folded guide portion (5) positioned between the guide input (3) and the guide output (4) for transmitting light from the input (3) to the output (4), wherein the optical waveguide (2) is folded to form an optical ring resonator, wherein the optical waveguide (2) is a single continuous waveguide comprising a crossing point (6), said crossing point (6) being a point of the waveguide (2) where a first portion (7) of the waveguide (2) passes below or above a second portion (8) of the waveguide (2).

An apparatus includes an optical resonator having four ports, the four ports including a first port, a second port, a third port, and a fourth port. A first electronic circuit is configured to calculate first information representing a power difference between optical signals provided by two of the four ports. A method of operating the apparatus is also disclosed.

An optical micro-ring modulator (MRM) requires temperature tracking and locking such that the resonance notches / peaks of the MRM device are actively thermally shifted to coincide with the narrow input optical wavelength. Accordingly, it would be beneficial to auto tune an MRM device so that it functions as a high-speed modulator and accommodates initial process variations in manufacturing, the random thermal heating and cooling of the environment, and drift of the input laser line wavelength. The control system generates an error signal by comparing complementary tapped optical signals from the through and drop output waveguides of the MRM device where the controller is tuned to the high-speed electrical modulation of the device along with the slow-speed thermal transient behaviour of the MRM device. The controller can operate using balanced electrical modulation code, non-balanced modulation code and tuned to optimize for optical amplitude modulation (OMA) and extinction ratio.

Techniques for creating an SiGe / Si electro-optomechanical quantum transducer, comprising an SiGe / Si optical ring resonator and capacitor, that can be associated with a qubit are presented. The optical resonator, comprising an SiGe optical waveguide and a strained silicon membrane, can be formed and disposed over a substrate. The strained silicon membrane can have a photoelastic coupling with the SiGe optical waveguide. A capacitor, comprising a superconducting material, can be formed in proximity to the optical resonator. The top plate of the capacitor can be associated with the strained silicon membrane. A recessed region can be formed in the back side of the substrate along a desired silicon plane, extending to form a hole in the top side of the substrate. A superconducting material can be applied along substrate surfaces defining the recessed region and hole. The superconducting material covering the hole can be the bottom plate of the capacitor.

A first pump laser source produces a first pump optical signal at a first pump optical frequency v1P and launches it into a ring optical resonator to propagate in a forward direction around the ring optical resonator. A backscattered portion of the first pump optical signal propagates back to the first pump laser source and injection-locks it so that the first pump optical frequency v1P is locked to a first resonant mode optical frequency of the ring optical resonator. A second laser source producing a second pump optical signal at a second optical frequency v2P and can be similarly self-injection-locked to a second resonant mode optical frequency of the ring optical resonator different from the first resonant mode optical frequency.

The present invention relates to an optical sensor apparatus (1) comprising: a laser light source (2) for providing laser light (L); an optical ring resonator (3) which is arranged to receive part of the laser light via a coupler (4), the ring resonator (3) having an optically nonlinear material and / or an optically absorbing material such that a resonance curve (31) of the ring resonator (3) as a function of the wavelength of the laser light (L) to be received is asymmetrical with respect to a resonance wavelength (32), the resonance curve (31) having a side (31a) which rises gradually to the resonance wavelength and a side (31b) which rises steeply to the resonance wavelength (32); a detection device (5) which is designed to detect a portion of the laser light (L) not coupled into the ring resonator (3); a control device (6) which is designed to control the laser power of the laser beam source (2) on the basis of the detected portion of the laser light (L) not coupled into the ring resonator (3), such that laser light (L) coupled into the ring resonator (3) has a laser wavelength (30) which is located on the steeply rising side (31b) of the resonance curve (31).

An integrated circuit (IC) device includes an optoelectronic circuitry having a first heater and a second heater, and a controller circuitry having an input coupled to a photodiode of the optoelectronic circuitry and an output coupled to the first heater and the second heater of the optoelectronic circuitry, the controller circuitry configured to determine an offset from a baseline heater control signal code based on a transimpedance (TIA) control signal code of an input signal received from the photodiode, and provide a first heater control signal to the first heater and a second heater control signal to the second heater based on the offset of the optoelectronic circuitry.

A ring optical resonator is characterized by a Brillouin shift frequency Ωa. A first pump laser source produces a first pump optical signal at a first pump optical frequency ν1P and launches it into the ring optical resonator to propagate in a forward direction around the ring optical resonator. A backscattered portion of the first pump optical signal propagates back to the first pump laser source and injection-locks it so that the first pump optical frequency ν1P is locked to a first resonant mode optical frequency of the ring optical resonator. The first pump optical signal circulating in the ring optical resonator results in a first stimulated Brillouin laser (SBL) optical signal at a first SBL optical frequency ν1=ν1P−Ωa that resonantly propagates in a backward direction around the ring optical resonator at a different resonant mode optical frequency of the ring optical resonator.

The invention relates to an opto-mechanical microwave clock (100, 300, 400) integrated on a chip (103), comprising:-an optical waveguide (102) arranged on the chip (103),-a nanocavity (101) arranged substantially parallel to the optical waveguide (102), in which a modulation frequency of an optical mode excited in the nanocavity (101) corresponds to an oscillation frequency of a mechanical mode of the nanocavity (101), the modulated optical mode is evanescently coupled with the optical waveguide (102) in at least one coupling region; wherein the opto-mechanical clock (100, 300, 400) further comprises:-mode locking means configured to control opto-mechanical oscillation stability of the opto-mechanical microwave clock, the mode locking means comprising at least one of a contactless radio frequency mode locking means, an acoustic passive automatic mode locking means, an optical mode locking means comprising an optical ring resonator.

A source for providing electromagnetic radiation within a particular spectral range, including: a ring-shaped optical resonator for circulating a plurality of wavelength bands including: a first optical phase modulator, a first chomatic dispersion device, a second optical phase modulator, a multi-line spectral domain filter, a second chromatic dispersion device, and an optical amplifier; a controller coupled to the first optical phase modulator and the second optical phase modulator which is configured to drive the first optical phase modulator with a first waveform and the second optical phase modulator with a second waveform, the first chromatic dispersion device being configured between the first optical phase modulator and the second optical phase modulator to provide chromatic dispersion so as to subject each of the plurality of wavelength bands to a respective plurality of different time delays, the first and second optical phase modulators being configured to create spectral broadening.

A radar sensor apparatus for a transportation vehicle having a central electronic computing device to generate an electrical control signal for a transmitting device; a laser device which, in accordance with the electrical control signal, generates an optical transfer signal for transfer to the transmitting device; a transformation device having at least one first optical ring resonator which, in accordance with the optical transfer signal, generates a pulse train, the transformation device generates an electrical emission signal in accordance with the pulse train; the transmitting device which is designed to emit the electrical emission signal; and a receiving device for receiving an electrical receive signal and for transferring the electrical receive signal to the central electronic computing device. Also disclosed is a method for operating the radar sensor apparatus.

An integrated circuit (IC) device, the integrated circuit (IC) device including: an optoelectronic circuit having a first heater and a second heater; and a controller circuit having an input coupled to the photodiode of the optoelectronic circuit and an output coupled to the first heater and the second heater of the optoelectronic circuit, the controller circuit is configured to determine an offset from a baseline heater control signal code based on a transimpedance (TIA) control signal code of an input signal received from the photodiode, and provide a first heater control signal to the first heater and a second heater control signal to the second heater based on the offset of the optoelectronic circuit.

An optomechanical accelerometer includes an optical ring resonator, a proof mass, and one or more springs coupling the proof mass with the optical ring resonator. The ring resonator defines a perpendicular axis centrally therethrough and an optical resonant frequency. The proof mass is movable along the perpendicular axis. The one or more springs are configured to selectively stretch or contract when the proof mass is mechanically displaced along the perpendicular axis to generate stress or strain on the first ring resonator. Mechanical displacement of the proof mass is operable to modify the optical resonant frequency of the first ring resonator.

Techniques are described for efficiently generating optical traps within a quantum information processor by resonantly enhancing optical trap light using an optical ring resonator. An optical ring resonator may effectively recycle optical trap light in a closed optical path, such that the optical trap light passes through a vacuum chamber many times, reinforcing the intensity of the optical traps. As such, a low power light source may be utilized to generate the optical traps. While such a light source may generate light with a power that is alone insufficient to produce the desired number of optical traps, the optical ring resonator reinforces the intensity of this light through repeated passes through the vacuum chamber, building up light of sufficient intensity to produce the desired number of optical traps in the vacuum chamber.

An integrated circuit (IC) device includes an optoelectronic circuitry having a first heater and a second heater, and a controller circuitry having an input coupled to a photodiode of the optoelectronic circuitry and an output coupled to the first heater and the second heater of the optoelectronic circuitry, the controller circuitry configured to determine an offset from a baseline heater control signal code based on a transimpedance (TIA) control signal code of an input signal received from the photodiode, and provide a first heater control signal to the first heater and a second heater control signal to the second heater based on the offset of the optoelectronic circuitry.

An optomechanical accelerometer includes an optical ring resonator, a proof mass, and one or more springs coupling the proof mass with the optical ring resonator. The ring resonator defines a perpendicular axis centrally therethrough and an optical resonant frequency. The proof mass is movable along the perpendicular axis. The one or more springs are configured to selectively stretch or contract when the proof mass is mechanically displaced along the perpendicular axis to generate stress or strain on the first ring resonator. Mechanical displacement of the proof mass is operable to modify the optical resonant frequency of the first ring resonator.

An optical device includes a ring resonator, a first optical waveguide with an end portion merged into a circumference of the ring resonator, and a second optical waveguide spaced apart from the circumference of the ring resonator. The first optical waveguide is configured to directly inject photons into the ring resonator. The second optical waveguide is configured to output photons coupled from the ring resonator. The second optical waveguide includes an arc portion that partially surrounds the ring resonator. An end point of the arc portion is also an open end of the second optical waveguide.

A source for providing electromagnetic radiation within a specific spectral range, the source comprising: a ring optical resonator for circulating multiple bands, the ring optical resonator comprising: a first optical phase modulator, a first dispersive device, a second optical phase modulator, a multi-line spectral domain filter, a second dispersive device, and an optical amplifier; a controller coupled to the first optical phase modulator and the second optical phase modulator, the controller being configured to drive the first optical phase modulator with a first waveform and to drive the second optical phase modulator with a second waveform, the first dispersive device being configured between the first optical phase modulator and the second optical phase modulator to provide dispersion, thereby subjecting each of the multiple bands to a corresponding plurality of different time delays, the first optical phase modulator and the second optical phase modulator being configured to create spectral broadening.

We provide a method for optical convolution based on frequency synthetic dimensions using a single optical ring resonator undergoing dynamic modulations. The convolution is achieved using the scattering matrix of such a modulated system with discrete frequency input matching the free spectral range of the ring resonator. We use both a phase modulator and an amplitude modulator to obtain both unitary and non-unitary scattering matrices, analogous to non-Hermitian physics in synthetic dimensions.

A device including a substrate; a first layer resting on the substrate, the first layer including a first portion and a second portion mobile with respect to each other; and a ring-shaped optical resonator defined in a second layer. The resonator includes a first portion fixed to a first anchor pad connected to the first portion of the first layer and a second portion fixed to a second anchor pad connected to the second portion of the first layer.

Some embodiments of the present disclosure are directed to an optical device including a stable optical waveguide loop and method of manufacturing the same. For example, an optical device (e.g., an optical ring resonator) may include a substrate and an optical waveguide loop formed on the substrate. The optical waveguide loop may define a path, where the optical waveguide loop may have an inner and outer radius that may be configured to be variable along the path of the optical waveguide loop. Further, a distance between the inner radius and a corresponding outer radius may define a width of the optical waveguide loop, where the width may be variable along the path of the optical waveguide loop. Additionally, or alternatively, the width may be configured to admit a plurality of higher order modes of light that may couple to a fundamental mode of light.

An optical ring resonator-based gyroscope includes a photonic integrated circuit (PIC) chip including a plurality of optical elements, the plurality of optical elements including a resonator ring; and a printed circuit board including a plurality of electrical components, the photonic integrated circuit being mounted on a surface of the printed circuit board, the photonic integrated circuit and the printed circuit board being electrically connected. A photonic integrated circuit (PIC) chip including a substrate; a dielectric layer; a first waveguide layer forming at least: a ring resonator and reflector portions; a second waveguide layer forming at least: vertical Bragg grating couplers disposed over one of the plurality of reflector portions, a chip waveguide; a magneto-optic layer encapsulated in the dielectric layer; and a metal layer forming a plurality of metal connection pads and a plurality of wire traces for electrically connecting the PIC chip to electronic components.

Embodiments herein describe a method for selectively filtering different wavelengths of optical signals received from an optical channel using a cascaded ring resonator, each of the cascaded ring resonators having a first ring and a second ring. The first ring has a varying waveguide width along its length, the first ring being configured to form a first waveguide width portion and a second waveguide width portion, the first waveguide width portion having a greater width than the second waveguide width portion. The second ring has a varying waveguide width along its length, the second ring being configured to form a third waveguide width portion and a fourth waveguide width portion, the fourth waveguide width portion having a greater width than the third waveguide width portion. The method further connects a receiver to a respective cascaded ring resonator, each of the receivers having a photodetector configured to discriminate the optical signals.

An optomechanical accelerometer includes an optical ring resonator, a proof mass, and one or more springs coupling the proof mass with the optical ring resonator. The ring resonator defines a perpendicular axis centrally therethrough and an optical resonant frequency. The proof mass is movable along the perpendicular axis. The one or more springs are configured to selectively stretch or contract when the proof mass is mechanically displaced along the perpendicular axis to generate stress or strain on the first ring resonator. Mechanical displacement of the proof mass is operable to modify the optical resonant frequency of the first ring resonator.

The present invention provides an optical sensor device (1) comprising a laser light source (2) for providing laser light (L), an optical ring resonator (3) which is arranged to receive a portion of the laser light via a coupler (4), wherein the ring resonator (3) comprises an optically non-linear material and / or an optically absorbing material such that a resonance curve (31) of the ring resonator (3) as a function of the wavelength of the laser light (L) to be received is asymmetrical with respect to a resonance wavelength (32), wherein the resonance curve (31) has a side (31a) rising gently towards the resonance wavelength and a side (31b) rising steeply towards the resonance wavelength (32), a detection device (5) which is configured to detect a portion of the laser light (L) not coupled in the ring resonator (3), a control device (6) which is configured toto control a laser power of the laser beam source (2) based on the detected portion of the laser light (L) not coupled into the ring resonator (3) such that laser light (L) coupled into the ring resonator (3) has a laser wavelength (30) which is arranged on the steeply rising side (31b) of the resonance curve (31).