6results about How to "High tuning accuracy" patented technology

The invention relates to the technical field of optical fiber lasers, and proposes an ultra-wideband tunable optical fiber communication light source based on gas stimulated Raman scattering, comprising a 1μm band seed source, an electro-optic modulator, a signal generator, an optical fiber amplifier, a solid-hollow compact coupling device, an optical fiber end cap, a hollow-core optical fiber, a micro gas cavity, a lens, a dichroic mirror, and a methane gas 1μm band tunable pump source. The tuning range covers at least 1024nm-1126nm. Based on the stimulated Raman scattering effect of methane gas, it can be converted into a communication band laser covering the entire S+C+L+U band. Thanks to the Raman characteristics of methane molecules, the output laser has a corresponding narrow line width single spectral line under single wavelength pumping, without accompanying ASE noise amplification, etc., and does not need to be selected through secondary filtering. At the same time, the use of the hollow-core optical fiber ensures that the output laser is only single-mode, and high beam quality can be guaranteed without other operations.

The present invention relates to the technical field of optical fiber lasers, and proposes a mid-infrared band wide-range precisely tunable optical fiber laser light source, which adopts a widely tunable 1μm laser pump source to obtain an ultra-wideband mid-infrared laser output greater than 1000nm, including a 1μm band tunable pulse seed source, an optical fiber amplifier module, an optical fiber end cap, an end cap coupling device, a hollow-core optical fiber, and a small gas cavity. The 1μm band tunable pulse seed source is a nanosecond pulse laser with a tuning range covering 1024nm-1080nm. Based on the direct tuning of the 1μm band pump source, the wavelength of the 3μm-4μm laser is directly precisely tuned, and the tuning is convenient without adding a seed source. The 1μm band pump source is more likely to obtain high-power laser output, and the hollow-core optical fiber has a high damage threshold, which can effectively improve the mid-infrared output power. The gas Raman laser has a narrow linewidth and the hollow-core optical fiber has a small dispersion, so that the output mid-infrared laser has a narrow linewidth characteristic.

This invention provides a method for measuring the reflection coefficient of an antenna and its user equipment. The method includes the following steps: measuring at least two received signals. Each received signal is measured under a different tuner measurement control word. Multiple tuner scattering parameters and a front-end reflection coefficient at the receiver (Rx) frequency are obtained. These tuner scattering parameters correspond to different tuner measurement control words. The antenna reflection coefficient is calibrated based on the at least two received signals, the tuner scattering parameters, and the front-end reflection coefficient. This innovative method enables closed-loop antenna tuning for all antennas in a mobile device, regardless of their connection to the transmitter (Tx). By utilizing received signals for measurement, this method overcomes the limitations of conventional methods and improves the tuning accuracy and efficiency of mobile antennas.

This invention discloses a tension adjustment and modulation system, device, and method for stringed instruments based on screw drive. The system includes at least one tension adjustment module, each module comprising: a screw drive mechanism that converts rotational motion into linear motion to adjust string tension; a tension sensor positioned in the force transmission path to detect tension values; a drive motor that drives the screw; and a control circuit including a microcontroller and a memory. This invention replaces the traditional rotary winding knob with linear screw drive, eliminating nonlinearity and backlash problems; and replaces audio frequency detection with direct tension measurement. The system supports: one-key recovery—storing the target tension value and adjusting it to the target value in a closed loop after triggering; continuous pitch maintenance—automatically monitoring and fine-tuning to correct drift while powered on; and active tension modulation—actively changing string tension in response to a trigger signal to achieve effects such as pitch bend, string bending, and vibrato. It is applicable to all stringed instruments that rely on string tension to determine pitch.

The application provides a kind of across hardware tensor program's tuning method, device, equipment, medium and product, it is related to compiler optimization and deep learning technical field, this method includes: obtaining tensor program to be tuned and target hardware information;Tensor program to be tuned and target hardware information are input into across hardware tensor program tuning model, obtain the target tuning program of tensor program to be tuned that across hardware tensor program tuning model output;Wherein, across hardware tensor program tuning model is based on tensor program data sample training and obtains, across hardware tensor program tuning model is the model that the running feature of tensor program to be tuned on target hardware information is structured inference in combination with tensor program to be tuned and target hardware information to tensor program to be tuned.This technical scheme of the application is based on across hardware tensor program tuning model and directly carries out structured inference to the running feature of tensor program to be tuned on target hardware information, obtains target tuning program, improves the accuracy of target tuning program.

This invention discloses a fully digitally controlled programmable Ti:sapphire femtosecond oscillator carrier envelope offset frequency locking device, comprising an avalanche photodetector, a power divider, a first RF conditioning circuit, a second RF conditioning circuit, a frequency and phase discrimination circuit, a programmable proportional circuit, a programmable integral circuit, a programmable bias circuit, an inverting summation circuit, a programmable limiting circuit, an anti-saturation integral circuit, an output buffer circuit, a main control circuit, and a host computer. This invention enables the carrier envelope offset frequency to be locked to the repetition frequency. Employing a fully digitally controlled programmable PI circuit, combined with innovative anti-saturation integral and output limiting functions, it offers advantages such as low latency, high precision, high stability, and high security.