Abstract: A connector plug is disclosed. The connector plug has a housing and a plurality of end walls disposed on the housing. The plurality of end walls each include at least one block notch.

Abstract: Embodiments of the present disclosure provide a receiver and a receiving method of the receiver, so that monolithic integration of multiple receiving channels can be implemented. The receiver includes: a zero intermediate frequency channel, performing in-phase/quadrature (IQ) down conversion on a radio frequency signal at a first frequency band using a frequency division or frequency multiplication signal of a first oscillation signal; and a superheterodyne channel, performing down conversion on a radio frequency signal at a second frequency band using the frequency division or frequency multiplication signal of the first oscillation signal, where the first frequency band is different from the second frequency band.

Abstract: A connector assembly comprising: a first connector having a housing on which an elastic locking piece is suspended; a second connector having a housing on which a locking member mating with the elastic locking piece is formed so as to lock the first and second connectors together when the first and second connectors are mated together; and a connector position assurance device having a first stopper and a second stopper behind the first stopper. A first mating stopper is formed on the elastic locking piece, and a second mating stopper is formed on the housing of the first connector. The connector position assurance device only can be inserted into a first position under the elastic locking piece of the first connector when the first and second connectors are separate from each other.

Abstract: A ring laser gyroscope is provided. The ring laser gyroscope includes an optical ring resonator, an optical source to provide a pump beam at a pump frequency, a beat detector, and an optical clock detector. The pump beam is coupled to the optical ring resonator in the first direction and stimulates a first optical gain curve at a first stokes wave frequency downshifted by a Brillouin stokes frequency from the pump frequency. A first order stimulated Brillouin scattering (SBS) beam propagates in the second direction and a second order SBS beam propagates in the first direction. The beat detector produces an optical beat signal that varies as a function of a frequency difference between the first order SBS beam and the second order SBS beam. The optical clock detector generates a reference frequency signal based on two co-propagating beams.

Abstract: Compositions and methods are provided for the diagnosis and treatment of inflammation and autoimmune disorders, such as psoriasis. Compositions and methods for modulating IL-23 or IL-22 signaling are provided.

Abstract: An electrical connector assembly is disclosed having a first connector and a second connector. The first connector has a first engagement portion on a first mating end, and at least one first ridge positioned on and protruding outward from an outer surface of the first engagement portion. The second connector has a second engagement portion on a second mating end. The second engagement portion has a first connector receiving chamber having an inner surface, and at least one second ridge positioned on and protruding inward from the inner surface. The at least one second ridge is positioned on, and protrudes inward from, the inner surface, being in electrical contact with the first ridge when the first engagement portion is positioned in the first connector receiving chamber.

Abstract: Embodiments of the present disclosure provide a receiver and a receiving method of the receiver, so that monolithic integration of multiple receiving channels can be implemented. The receiver includes: a zero intermediate frequency channel, performing in-phase/quadrature (IQ) down conversion on a radio frequency signal at a first frequency band using a frequency division or frequency multiplication signal of a first oscillation signal; and a superheterodyne channel, performing down conversion on a radio frequency signal at a second frequency band using the frequency division or frequency multiplication signal of the first oscillation signal, where the first frequency band is different from the second frequency band.

Abstract: A reflectance spectroscopy measuring and sampling system for gemstone testing is disclosed. The system includes a first light source (1), a second light source (2), a light filtering element, an integrating sphere (S), an optical fiber (9), a spectroscopic detection module (10), an analog-digital conversion module (11) and a data processing terminal (12), wherein the integrating sphere (S) is provided with an entrance port, a sampling opening (6) and a reflected light exit port (7). A reflectance spectroscopy measuring and sampling method for gemstone testing is also disclosed. The system and the method have an excellent performance and can be widely used in the gemstone identification.

Abstract: Embodiments of the present invention provide a receiver and a receiving method of the receiver, so that monolithic integration of multiple receiving channels can be implemented. The receiver includes: a zero intermediate frequency channel, performing in-phase/quadrature (IQ) down conversion on a radio frequency signal at a first frequency band using a frequency division or frequency multiplication signal of a first oscillation signal; and a superheterodyne channel, performing down conversion on a radio frequency signal at a second frequency band using the frequency division or frequency multiplication signal of the first oscillation signal, where the first frequency band is different from the second frequency band.

Abstract: Systems and methods for an optical frequency comb stimulated Brillouin scattering gyroscope with a rigid optical waveguide resonator are provided. In one embodiment, a system comprises: a light source that produces an optical frequency comb comprising a multiple-frequency light field; a rigid optical waveguide resonator coupled to the light source, wherein a recirculating optical frequency comb produced from the optical frequency comb propagates in a first direction around the rigid optical waveguide resonator and generates within the rigid optical waveguide a SBS light field comprising at least one SBS frequency component, and wherein one or more optical frequency components of the recirculating optical frequency comb are locked on resonance peaks of the rigid optical waveguide resonator; and an optical mixer configured to produce an optical beat signal that varies as a function of a frequency difference between the stimulated Brillouin scattering light field and the recirculating optical frequency comb.

Abstract: A resonator fiber optic gyroscope comprises a master laser device that emits a reference optical signal, a first slave laser device that emits a clockwise optical signal, and a second slave laser device that emits a counter-clockwise optical signal. A resonator ring cavity is in communication with the master laser device and the slave laser devices. A sine wave generator is coupled to the resonator ring cavity and outputs a common cavity modulation frequency comprising in-phase and quadrature signals. A laser stabilization servo receives a clockwise reflection signal that includes the common cavity modulation frequency from the resonator ring cavity. A modulation stripper coupled to the servo receives the in-phase and quadrature signals, receives a net error signal from the servo, demodulates the net error signal at the common cavity modulation frequency, and transmits a stripper signal to the servo to remove the signal at the common cavity modulation frequency.

Abstract: Systems and methods for an intensity stabilized resonator fiber optic gyroscope are provided. In one embodiment, a method for providing optical intensity stabilization system for a resonator fiber optic gyroscope (RFOG) is provided. The method comprises: injecting a phase modulated light beam into a fiber optic ring resonator coil; measuring a DC component of the phase modulated light beam at an output of the fiber optic ring resonator coil; generating a feedback control signal based on the DC component; and attenuating the phase modulated light beam prior to injection into the fiber optic ring resonator coil by controlling a variable optical attenuator with the feedback control signal.

Abstract: A connector plug is disclosed. The connector plug has a housing and a plurality of end walls disposed on the housing. The plurality of end walls each include at least one block notch.

Abstract: An optical-fiber filter system to narrow a linewidth and to reduce noise fluctuations of an optical beam is provided. The optical-fiber filter system includes an optical fiber having a first end-face and an opposing second end-face, the first end-face and the second end-face setting a fiber length; a fiber Bragg grating having a first reflectivity positioned at the first end-face; and a reflector having a second reflectivity positioned at the second end-face. When the optical beam at a first frequency is coupled from a laser into one of the first end-face or the second end-face, a resonant cavity is established at the first frequency between the fiber Bragg grating and the reflector while Brillouin scattered light shifted from the first frequency within the optical fiber is transmitted through the fiber Bragg grating.

Abstract: A resonator fiber optic gyroscope comprises a master laser device that emits a reference optical signal, a first slave laser device that emits a clockwise optical signal, and a second slave laser device that emits a counter-clockwise optical signal. A resonator ring cavity is in communication with the master laser device and the slave laser devices. A sine wave generator is coupled to the resonator ring cavity and outputs a common cavity modulation frequency comprising in-phase and quadrature signals. A laser stabilization servo receives a clockwise reflection signal that includes the common cavity modulation frequency from the resonator ring cavity. A modulation stripper coupled to the servo receives the in-phase and quadrature signals, receives a net error signal from the servo, demodulates the net error signal at the common cavity modulation frequency, and transmits a stripper signal to the servo to remove the signal at the common cavity modulation frequency.

Abstract: Systems and methods for a small low cost resonator fiber optic gyroscope (RFOG) with reduced optical errors are provided. In one embodiment, a RFOG comprises: a light source; an optical chip configured to couple a clockwise optical signal and a counterclockwise optical signal from the light source into a fiber optic resonator and couple the clockwise optical signal and the counterclockwise optical signal from the fiber optic resonator to at least one photodetector. The fiber optic resonator comprises a fiber optic coil having a first end point and a second end point. The fiber optic coil has a 90-degree splice located substantially half-way between the first end point and the second end point, is wrapped around a first fiber stretcher located between the first end point and the 90-degree splice, and is wrapped around a second fiber stretcher that is located between the second end point and the 90-degree splice.

Abstract: Systems and methods for stabilized stimulated Brillouin scattering lasers with ultra-low phase noise are provided. In one embodiment, a method for producing a Stimulated Brillouin Scattering (SBS) beam comprises: generating laser light from a tunable laser source; splitting the laser light into a first light beam and a second light beam; creating a phase modulated light beam by applying a phase modulation to the first light beam; locking a frequency of the laser light to a frequency of a ring cavity using the phase modulated light beam and a Pound-Drever-Hall servo loop coupled to the tunable laser source; coupling the second light beam into the ring cavity in a direction of travel opposite to that of the phase modulated light beam; generating a Stimulated Brillouin Scattering light beam in the ring cavity from the second light beam; and outputting the Stimulated Brillouin Scattering light beam.

Abstract: Systems and methods for an intensity stabilized resonator fiber optic gyroscope are provided. In one embodiment, a method for providing optical intensity stabilization system for a resonator fiber optic gyroscope (RFOG) is provided. The method comprises: injecting a phase modulated light beam into a fiber optic ring resonator coil; measuring a DC component of the phase modulated light beam at an output of the fiber optic ring resonator coil; generating a feedback control signal based on the DC component; and attenuating the phase modulated light beam prior to injection into the fiber optic ring resonator coil by controlling a variable optical attenuator with the feedback control signal.

Abstract: A light-source system to output at least one stable phase modulated coherent light beam is provided. The light-source system includes a multi-frequency laser system, at least one phase modulator, at least one feedback photodetector, and at least one modulation servo. The multi-frequency laser system emits a reference light beam and provides at least one unmodulated-light beam having a respective at least one carrier frequency offset from the reference carrier frequency. The phase modulator modulates the unmodulated-light beam provided by the multi-frequency laser system. The frequency-selection device monitors a frequency component of interest. The feedback photodetector provides information indicative of beat frequencies between the reference light beam and the modulated-light beam.

Abstract: Systems and methods for stabilized stimulated Brillouin scattering lasers with ultra-low phase noise are provided. In one embodiment, a method for producing a Stimulated Brillouin Scattering (SBS) beam comprises: generating laser light from a tunable laser source; splitting the laser light into a first light beam and a second light beam; creating a phase modulated light beam by applying a phase modulation to the first light beam; locking a frequency of the laser light to a frequency of a ring cavity using the phase modulated light beam and a Pound-Drever-Hall servo loop coupled to the tunable laser source; coupling the second light beam into the ring cavity in a direction of travel opposite to that of the phase modulated light beam; generating a Stimulated Brillouin Scattering light beam in the ring cavity from the second light beam; and outputting the Stimulated Brillouin Scattering light beam.