Tunable true-time-delay experiment device and method based on wavelength division multiplexing

A technology of wavelength division multiplexing and experimental equipment, which is applied in the direction of measurement equipment, electromagnetic wave re-radiation, and utilization of re-radiation, etc., can solve problems such as complex operations, achieve the effects of expanding the tuning range, simple equipment, and cost savings

Active Publication Date: 2017-05-10
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The system tunes the adjustable delayer, introduces multi-channel errors, and needs to tune multiple devices at the same time, and the operation is more complicated

Method used

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  • Tunable true-time-delay experiment device and method based on wavelength division multiplexing
  • Tunable true-time-delay experiment device and method based on wavelength division multiplexing
  • Tunable true-time-delay experiment device and method based on wavelength division multiplexing

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Embodiment 1

[0051] Experimentally tested a fixed-wavelength laser 2 with an output wavelength of 1542.9nm; a wavelength-tunable laser 1 with a center wavelength of 1550.9nm and a tuning range of ; The first wavelength division multiplexer 3-1, the second wavelength division multiplexer 3-2 and the third wavelength division multiplexer 3-3 are the same, and the wavelength ranges of the two wavelength division channels are respectively: , The reflection wavelength of the first uniform fiber grating 7-1 is 1542.9nm, the grating length is 4mm, the center reflection wavelength of the first linearly chirped fiber grating 8-1 is 1550.9nm, the chirp coefficient is 3nm / cm, and the grating length is 12mm, the head-to-tail distance between the two gratings is 12mm; the reflection wavelength of the second uniform fiber grating 7-2 is 1542.9nm, the grating length is 4mm, the center reflection wavelength of the second linearly chirped fiber grating 8-2 is 1550.9nm, and the chirp coefficient is 6nm / ...

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Abstract

The invention discloses a tunable true-time-delay experiment device and method based on wavelength division multiplexing, and the method comprises the steps: building the tunable true-time-delay experiment device based on the wavelength division multiplexing: building two groups of delay lines which are formed by the series connection of uniform fiber bragg gratings and chirp fiber bragg gratings and one group of delay lines which are formed by the series connection of two chirp fiber bragg gratings, respectively connecting two ports of three optical circulators, enabling the three groups of delay lines to three arms of a 1*2 optical splitter so as to achieve the two-stage time delay, adding a delay compensation module to one delay channel, and finally connecting the remaining delay devices; carrying out the synchronous tuning of the wavelength of a laser with the tunable wavelength and the chirp fiber bragg gratings at one position, and achieving the real-time tuning of a tunable true-time-delay system. The deice achieves the independent tuning of the delay time of one signal of a multiplexing signal, reduces an error source, is high in tuning precision, is large in tuning range, is simple in structure, and is low in manufacturing difficulty.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to a tunable true delay experimental device and an experimental method based on wavelength division multiplexing. Background technique [0002] As the key technology of defense and counterattack in military strategy, radar has been continuously expanding its connotation and research content. Optically controlled phased array radar technology shows good performance under the working conditions of strong clutter, strong interference and hard strike, and has great technical potential. Therefore, its development and research have received widespread attention at home and abroad. [0003] The phased array radar with optical fiber delay line as the delay device is the optically controlled phased array radar. Its core is an optically controlled phased array antenna, which is arranged by many radiating elements. The existing tunable true time-delay system m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S7/486G01S7/491G01S17/02
CPCG01S7/4818G01S7/4865G01S7/4915G01S17/02
Inventor 马骏王朕朱日宏
Owner NANJING UNIV OF SCI & TECH
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