Abstract: RF and microwave devices and techniques are disclosed for processing RF and microwave signals by using (1) photonic or optical components and (2) RF and microwave components. In some implementations, a part of the processing is performed in the RF and microwave domain such as applying a microwave or RF input signal to control an optical modulator ,and another part of the processing is performed in the optical domain such as optical filtering of the modulated optical beam to select desired microwave or RF spectral components. The frequency of a selected spectral component can be tuned by either tuning the frequency of the optical beam that is modulated by the optical modulator or a filter that is used to filter modulated optical beam.

Abstract: Integrated opto-electronic oscillators that use micro resonators in the optical section of the opto-electronic feedback loop.

Abstract: Multi-loop opto-electronic oscillators using tunable RF or microwave filters that achieve signal filtering in RF or microwave frequencies by optical filtering and signal tuning by optical tuning.

Abstract: This application describes optical resonators having deposited optical material layers and optical resonators having layered structures to support whispering gallery modes.

Abstract: Devices and techniques for achieving signal filtering in RF or microwave frequencies by optical filtering using two separate optical paths. Each optical path may include one or more optical resonators to achieve desired optical filtering.

Abstract: This application describes coupled and non-coupled opto-electronic oscillators with enhanced performance. Coupled OEOs implement a dispersion compensation mechanism to reduce dispersion-induced optical loss, a polarization control mechanism to reduce polarization-dependent optical loss, or a combination of the dispersion compensation mechanism and the polarization control mechanism to enhance the oscillator performance.

Abstract: Devices and techniques for filtering RF or microwave frequencies by optical filtering using a tunable optical filter.

Abstract: This application describes whispering gallery modes resonators made of electro-optic materials that are optically coupled to one or two waveguide couplers.

Abstract: Tunable receivers and techniques for receiving an electrical oscillator signal in the RF, microwave or millimeter spectral range based on photonics technology to use both (1) photonic or optical components and (2) electronic circuit components.

Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a system including an optical resonator and an optical element having a periodic structure for coupling of light into the optical resonator.

Abstract: Integrated opto-electronic oscillators that use micro resonators in the optical section of the opto-electronic feedback loop.

Abstract: This application describes optical resonators substantially free of hydrogen and hydroxyl radicals and related fabrication techniques.

Abstract: Coupled opto-electronic oscillators with a whispering-gallery-mode (WGM) optical resonator inside the laser cavity to produce oscillation signals out of the optical spectral range, e.g., RF or microwave frequencies.

Abstract: Devices and techniques for achieving signal filtering in RF or microwave frequencies by optical filtering via two optical resonators in two separate optical paths. One optical resonator is tunable to tune the filtering in RF or microwave frequencies. Tunable opto-electronic oscillators may be constructed based on described filters.

Abstract: Devices and techniques for achieving continuous tuning of coupled opto-electronic oscillators with signal filtering in RF or microwave frequencies by optical filtering via two optical resonators in two separate optical paths.

Abstract: This application describes devices and techniques for using microwave or RF resonators to provide DC bias, DC blocking, and impedance matching to microwave or RF devices. Both planar and non-planar implementations may be used.

Abstract: Opto-electronic regenerative circuits and devices for processing RF or microwave signals based on opto-electronic oscillator designs.

Abstract: This application describes whispering gallery modes resonators that are optically coupled to one or two waveguide grating couplers formed on a substrate.

Abstract: An opto-electronic oscillator including a modulator for outputting modulated light and a tunable filter for receiving modulated light output from the modulator.

Abstract: This application teaches systems and techniques that use an optical coupler and a film for evanescently coupling light to or from an optical or electro-optical device. The film is connected to the coupler surface as a spacer for setting the distance between the optical coupler and the optical or electro-optical device.