9 results about "Injection locked" patented technology

A system includes an oscillator and an injection circuit coupled to the oscillator. The injection circuit includes a first injection branch coupled to a node, wherein the first injection branch is configured to receive a first clock signal and generate a first injection current based on the first clock signal. The injection circuit also includes a second injection branch coupled to the node, wherein the second injection branch is configured to receive a second clock signal and generate a second injection current based on the second clock signal, and wherein the first injection current and the second injection current are combined at the node.

The present invention provides an integrated distributed optical fiber sensing system comprising: an on-chip integrated laser (1), an injection locking unit (3), a distributed feedback laser (2), a semiconductor optical amplifier (5), an optical circulator (6), a sensing optical fiber (7), and a coherent detection unit (4), wherein the on-chip integrated unit (10a) is obtained by on-chip integration of the injection locking unit (3) and the coherent detection unit (4).

This invention discloses a terahertz signal generation system and method based on space-based optical radio frequency technology, comprising an optical comb generation module, an optical carrier frequency selection and modulation module, a transmission module, and a photoelectric conversion module arranged sequentially. The optical comb generation module generates an optical frequency comb. The optical carrier frequency selection and modulation module selects at least two optical carriers from the optical frequency comb and modulates the optical carriers with radio frequency signals to obtain multiple optical signals. The invention utilizes space-based optical radio frequency technology to achieve the generation and transmission of ultra-wideband terahertz signals, overcoming the bandwidth limitations of traditional electronic technology and the problem of excessive loss of terahertz signals during long-distance transmission. Optical injection locking technology is used to suppress spurious signals generated during optical domain signal processing. Furthermore, the reconfigurable generation of terahertz signals can be achieved through the joint control of the local oscillator signal and dual lasers, realizing the generation and transmission of high-speed, stable, and low-spurious broadband terahertz communication signals.

The present application discloses a quantum state encoding device and method without a long delay line. The device and method use a random minute radio frequency signal to modulate a laser to achieve phase difference adjustment between pulse pairs, while simultaneously employing chopping to achieve a constant phase difference between two laser pulses of a pulse pair. Thus, without the aid of a long delay line interferometer or multiple lasers used for injection locking, the requirements for phase randomization between pulse pairs and a constant or specific phase difference between the two laser pulses in each pulse pair can be simultaneously satisfied. In addition, the present application can be implemented by means of conventional lasers, intensity modulators, and phase modulators, facilitating chip integration and achieving high yield and good stability.

An injection-locked oscillator includes a plurality of delay elements, two or more voltage control circuits, a phase comparator and a controller. The plurality of delay elements is connected in a loop and coupled to a global power supply. Each delay element has an input driven by a preceding stage and an output that drives a next stage. Each voltage control circuit couples one of the plurality of delay elements to the global power supply. The phase comparator is coupled to in-phase and quadrature outputs of the injection-locked oscillator. The controller is coupled to an output of the phase comparator and is configured to drive control inputs of the two or more voltage control circuits. The control input of each voltage control circuit determines a level of a voltage drop across the each voltage control circuit.

This invention relates to a high-efficiency self-injection locking module packaging structure and method, belonging to the field of photonic device integrated packaging technology. It includes a laser source module, a micro-resonant cavity module, a total heat sink base, a packaging shell, and a PCB board. While overcoming the challenges of large discrete device size, poor compatibility of monolithic integrated materials, and high requirements for flip-chip alignment, it achieves efficient and reliable coupling between the laser and the microcavity chip. By equipping the laser source and the microcavity core unit with independent precision temperature control and a graded heat sink optimization structure, independent and efficient thermal management is achieved within a compact space, ensuring long-term stable locking. This invention proposes a high-precision, high-reliability, and manufacturable packaging method that monitors and optimizes the self-injection locking state in real time before curing, possessing high design flexibility and manufacturing compatibility. Furthermore, the optimized end-face coupling structure and stable locking state significantly reduce the overall system power consumption and thermal load, making it particularly suitable for resource-constrained platforms such as satellites.

This automatic injection pen and its automatic injection locking structure primarily achieve precise control of the actuator through the coordinated operation of an extended pen barrel, an actuator sleeve, a drive spring, a locking ring, a locking structure, and a first linkage structure. Specifically, when the extended pen barrel is actuated, its top inclined surface contacts the protruding inclined surface on the locking ring, pushing the locking ring to rotate, thereby releasing the locking of the actuator sleeve, and the drive spring pushes it to the drug delivery position. Compared to existing technologies, this invention avoids the problem of the injection pen operating in a non-operating state through a precise locking structure, improving the stability and reliability of the device, while also increasing the convenience and safety of operation.

An electronic device may include signal generation circuitry that generates an optical signal for performing communications. The circuitry may include a laser coupled to a first port of an optical resonator over an optical path. An optical phase shifter may be disposed on the optical path. The signal generation circuitry may include multi-mode mitigation circuitry coupled in a loop between a second port of the optical resonator and the optical phase shifter. The laser may begin transmitting the optical signal. The laser may become injection locked to the optical resonator. The laser may initially operate in a multi-mode condition while injection locked to the optical resonator. The optical signal may include multiple signal peaks while the laser operates in the multi-mode condition. The multi-mode mitigation circuitry may process the optical signal until the optical signal includes only a single peak, corresponding to a single-mode condition of the laser.

The application discloses a noise suppression device of a multi-wavelength direct modulation laser, which comprises a direct modulation laser array, an optical splitter, a four-port fiber circulator, a low-loss nonlinear optical resonant cavity and a modulation module, the output of the direct modulation laser array is connected with the second port of the four-port fiber circulator, the third port of the four-port fiber circulator is connected with the low-loss nonlinear optical resonant cavity, the fourth port of the four-port fiber circulator is connected with the first port, and an injection locking closed loop is formed; the modulation module is electrically connected with the direct modulation laser array, the modulation frequency of the corresponding direct modulation laser is independently adjusted, and each wavelength laser can meet the resonance condition and the injection locking condition in the low-loss nonlinear optical resonant cavity, that is, the characteristic frequency shift is equal to the modulation frequency or an integer multiple of the modulation frequency. The application utilizes the super-narrow linewidth characteristic of nonlinear stimulated scattering and combines the injection locking technology, so that the linewidth of the direct modulation laser can be compressed to the Hz order, that is, the frequency noise is well suppressed. In addition, the application has the characteristics of multi-wavelength flexible adaptation, high cavity power utilization rate, simple structure and high integration degree.