A method of operating a resonator optical gyroscope includes generating optical signals having broadband frequency range; coupling optical signals into optical resonator (OR) to propagate in first direction and out of OR after optical signals pass through OR in first direction; applying phase modulation to optical signals coupled out of OR to generate phase-modulated optical signals; filtering first portion of phase-modulated optical signals to generate filtered, phase-modulated optical signals; generating first electrical signals indicative of power level of the filtered, phase-modulated optical signals and RIN; coupling second portion of phase-modulated optical signals into OR to propagate in second direction and out of OR after phase-modulated optical signals pass through the OR in second direction; generating second electrical signals indicative of power level of phase-modulated optical signals after passing through OR in second direction; and determining a rotation rate based on the first electrical signals and the second electrical signals.

An optical filter includes a first multiplexer having a first input end, a second input end, a first output end, and a second output end, a first waveguide optically coupled to the first input end, a second waveguide optically coupled to the second input end, a third waveguide optically coupled to the first output end, a fourth waveguide optically coupled to the second output end, and a ring resonator optically coupled to the third waveguide and the fourth waveguide.

An electro-optic receiver includes a polarization splitter and rotator (PSR) that directs incoming light having a first polarization through a first end of an optical waveguide, and that rotates incoming light from a second polarization to the first polarization to create polarization-rotated light that is directed to a second end of the optical waveguide. The incoming light of the first polarization and the polarization-rotated light travel through the optical waveguide in opposite directions. A plurality of ring resonators is optically coupled the optical waveguide. Each ring resonator is configured to operate at a respective resonant wavelength, such that the incoming light of the first polarization having the respective resonant wavelength optically couples into said ring resonator in a first propagation direction, and such that the polarization-rotated light having the respective resonant wavelength optically couples into said ring resonator in a second propagation direction opposite the first propagation direction.

The invention relates to a spectrum scanning assembly and an optical semiconductor element. The spectrum scanning assembly includes a band-pass waveguide assembly and multiple micro-ring resonators, and the band-pass waveguide assembly is respectively connected to the multiple micro-ring resonators; in which: the band-pass waveguide assembly is used to divide an optical signal to be tested into multiple band-pass optical signals with different central wavelengths and then respectively input into the multiple micro-ring resonators; each micro-ring resonator is used to perform scanning for resonant wavelengths in the band-pass optical signals to form first spectral information; in which after beam combination is performed on multiple pieces of first spectral information formed by the multiple micro-ring resonators, second spectral information may be formed. The spectrum scanning assembly and the optical semiconductor element of the invention have high spectral scanning precision.

The photonic integrated device comprises a substrate, a plurality of mechanical resonator structures on a surface of the substrate, exposed to receive sound waves from outside the device; a plurality of sensing optical waveguides, each sensing optical waveguide at least partly mechanically coupled to at least one of the mechanical resonator structures, or a sensing optical waveguide that is at least partly mechanically coupled to all of the mechanical resonator structures; an input optical waveguide on the surface of the substrate, coupled to the plurality of sensing optical waveguides or the single sensing optical waveguide, for supplying light to the plurality of sensing optical waveguides or the single sensing optical waveguide; at least one output optical waveguide on the surface of the substrate, coupled to the plurality of sensing optical waveguides or the single sensing optical waveguide, for collecting light from the plurality of sensing optical waveguides or the single sensing optical waveguide that has been affected by vibration of plurality of mechanical resonator structures.

An optical input polarization management device includes a polarization splitter and rotator (PSR) that directs a portion of incoming light having a first polarization through a first optical waveguide (OW). The PSR rotates a portion of the incoming light having a second polarization to the first polarization so as to provide polarization-rotated light. The PSR directs the polarization-rotated light through a second OW. Light within the first and second OW's is input to a first two-by-two optical splitter (22OS). A first phase shifter (PS) is interfaced with either the first or second OW. Light is output from the first 22OS into a third OW and a fourth OW. Light within the third and fourth OW's is input to a second 22OS. A second PS is interfaced with either the third or fourth OW. Light is output from the second 22OS into a fifth OW for further processing.

Optical soliton pulses are generated using a drive unit to provide pump light at a drive power, a passive optical waveguide ring resonator, a spectral filter in the passive optical waveguide ring resonator, and an output to optically couple optical solitons from the passive optical waveguide ring resonator. The drive power, a net group velocity dispersion (GVD) of the passive optical waveguide ring resonator, a frequency detuning parameter of the passive optical waveguide ring resonator, and the spectral filter are configured to generate one or more optical solitons.

An optical device includes a substrate and a single-mode optical waveguide disposed on the substrate and having a first geometrical width chosen to guide optical radiation in a first optical mode within a given wavelength range through the single-mode optical waveguide. An optical ring waveguide is disposed on the substrate and optically coupled to the single-mode optical waveguide, the optical ring waveguide having a second geometrical width wider than first geometrical width and configured to maintain therewithin optical radiation in the given wavelength range in a second optical mode different from the first optical mode.

A method of operating a resonator optical gyroscope includes generating optical signals having broadband frequency range; coupling optical signals into optical resonator (OR) to propagate in first direction and out of OR after optical signals pass through OR in first direction; applying phase modulation to optical signals coupled out of OR to generate phase-modulated optical signals; filtering first portion of phase-modulated optical signals to generate filtered, phase-modulated optical signals; generating first electrical signals indicative of power level of the filtered, phase-modulated optical signals and RIN; coupling second portion of phase-modulated optical signals into OR to propagate in second direction and out of OR after phase-modulated optical signals pass through the OR in second direction; generating second electrical signals indicative of power level of phase-modulated optical signals after passing through OR in second direction; and determining a rotation rate based on the first electrical signals and the second electrical signals.

An electro-optic receiver includes a polarization splitter and rotator (PSR) that directs incoming light having a first polarization through a first end of an optical waveguide, and that rotates incoming light from a second polarization to the first polarization to create polarization-rotated light that is directed to a second end of the optical waveguide. The incoming light of the first polarization and the polarization-rotated light travel through the optical waveguide in opposite directions. A plurality of ring resonators is optically coupled the optical waveguide. Each ring resonator is configured to operate at a respective resonant wavelength, such that the incoming light of the first polarization having the respective resonant wavelength optically couples into said ring resonator in a first propagation direction, and such that the polarization-rotated light having the respective resonant wavelength optically couples into said ring resonator in a second propagation direction opposite the first propagation direction.