Linear frequency modulation optical grating 5bit optical fiber delay network device and design method thereof

Abstract

The present invention discloses a linear frequency modulation optical grating 5bit optical fiber delay network device and a design method thereof. The device comprises an optical input module, a linear frequency modulation optical grating and an N-path optical switch, N is a positive integer, wherein the optical input module is configured to allow radio-frequency signals to be delayed to be carried on optical signals, the linear frequency modulation optical grating is configured to perform first-order delay for the radio-frequency signals on the optical signals, and each path of the N-path optical switch is provided with single mode fibers with different lengths configured to divide the radio-frequency signals after first-order delay into N paths and perform secondary delay of different time. The linear frequency modulation optical grating 5bit optical fiber delay network device and the design method thereof apply frequency modulation optical grating to greatly reduce the usage of theoptical fiber, only need to design the model of the optical grating according to actual demands to achieve continuous regulation of an optically controlling phased array radar waveform, and are largein delay range, high in precision, simple in structure and flexible in design.

Description

technical field [0001] The invention belongs to the field of optical fiber communication technology and optical delayer technology, and specifically relates to a chirp-based 5-bit optical fiber delay network device and a design method thereof. Background technique [0002] So far, it is still a technical difficulty to realize all-optical integration of optically controlled phased array radar. The optical delay network currently designed is relatively complicated and difficult to integrate. Fiber grating is a rising star in recent years. It was mainly used in optical fiber communication in the early days, but it has been widely used in the field of phased array in recent years. [0003] Although the traditional delay line based on optical switches has a relatively simple structure, there are relatively few delay states that can be realized. Optical switches with faster optical path switching are expensive, and a large number of optical fibers are used, which is not easy to in...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a 5-bit optical fiber delay network device based on chirp grating and its design method to solve the problems of low beam pointing accuracy and large delay error of the existing optically controlled phased array radar

Images