5 results about "High mode" patented technology

This invention discloses a highly integrated mode filter and its fabrication method, comprising a silicon substrate, a lower cladding layer, and an upper cladding layer, with a core layer between the upper and lower cladding layers. The core layer includes an input waveguide, a first mode routing region for filtering out the fundamental mode and converting higher-order modes into the fundamental mode for output, a single-mode region for transmitting the single-mode waveguide in the first mode routing region, a second mode routing region for converting the fundamental mode transmitted in the single-mode region into higher-order modes, and an output waveguide. The waveguide inputs from the incident port and propagates through the left-side first mode routing region, where the fundamental mode TE0 is filtered out by the curved waveguide; the higher-order mode TE1 is converted into the fundamental mode TE0 through the left-side first mode routing region, propagates through the central straight waveguide to the right-side second mode routing region, is converted into the higher-order mode TE1, and then outputs from the output port via the output waveguide. This mode filter is simple to fabricate, small in size, has excellent performance, low processing cost, high mode conversion rate, and strong anti-crosstalk capability. It selectively filters out some modes of light, improving the quality and stability of optical communication.

The application discloses a laser gyroscope frequency stabilization method and belongs to the technical field of precise laser gyroscopes. The application comprises the following steps: a mode (light intensity fluctuation change) is designed as a high-low period mode; high mode and low mode are denoised, analyzed, grouped and numbered in groups; the mode is selected and the mode corresponding position code is recorded so as to improve the stability of the frequency stabilization system; the frequency stabilization small dithering frequency adaptability is selected; and the frequency stabilization small dithering amplitude is adaptively adjusted. The application can effectively solve the mode selection problem of multiple types of laser gyroscopes, reduce the frequency stabilization fluctuation, improve the frequency stabilization mode selection accuracy and stability, and increase the small dithering adaptability and adaptability.

One aspect of the present invention is a signal detection device including a mode demultiplexer configured to convert N (N is a natural number) spatial mode signals including a plurality of higher modes excited in a transmission path fiber into N base modes and output the N basis modes, a frequency conversion unit configured to convert N optical signals into frequencies different from each other, a multiplexing unit configured to multiplex the N optical signals having frequencies that have been converted, and a reception unit configured to photoelectrically convert a multiplexed optical signal while maintaining modulation information for a phase and polarization, perform digital signal conversion and signal processing, and demodulate an original information sequence.

The invention discloses an OAM mode multiplication and division operation method and system based on an optical diffraction neural network, and relates to the field of orbital angular momentum. Digital signals are represented through OAM mode coding, any 2n times of digital multiplication / division operation can be achieved, the operation function has the advantages of being high in expandability, flexible, controllable and the like, and the method and system can be applied to the field of orbital angular momentum. A basic framework is expected to be established for complex arithmetic operation in a high-dimensional optical space, and a potential solution is provided for practical application of optical digital calculation; the OAM mode serves as an operation physical dimension, mode parallel independent transformation is completed through the optical diffraction neural network to achieve OAM mode numerical value shifting, and therefore digital multiplication / division operation is completed, and the obtained output array has high mode purity.

The application discloses a kind of probability mixed key system dynamic priority non-precise task energy-saving scheduling method and device, establish probability mixed key system, and determine the execution time under the worst case of probability of mixed key periodic task, according to the execution time under the worst case of probability of mixed key periodic task Calculation probability utilization rate;According to the probability utilization rate, determine the sufficient condition that probability mixed key system is scheduled feasible in low mode and high mode;According to the condition that scheduling is feasible, the energy consumption optimization speed S LO And the energy consumption optimization speed S HI Of high mode are calculated;When probability mixed key system is in low mode, mixed key periodic task is executed with the energy consumption optimization speed S LO Of low mode, when probability mixed key system is in high mode, mixed key periodic task is executed with the energy consumption optimization speed S HI Of high mode.The energy consumption optimization speed is calculated by using the execution time under the worst case of probability of task in the application, and then the system energy consumption is reduced.