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Optics differentiator based on time-domain pulse shaping system

A time-domain pulse and differentiator technology, applied in the field of optical signal processing, can solve the problems of optical differentiator bandwidth, central wavelength and order of differentiation that cannot be adjusted during use, and achieve high compatibility

Active Publication Date: 2016-11-16
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a photon differentiator based on a time-domain pulse shaping system, the purpose of which is to improve the tunability and reconfigurability of the optical differentiator, and solve the problems of bandwidth, center The problem that the wavelength and differential order cannot be adjusted in use

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  • Optics differentiator based on time-domain pulse shaping system
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  • Optics differentiator based on time-domain pulse shaping system

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0023] In the present embodiment, the first dispersion device (2) is composed of two cascaded dispersion values ​​of 500 ps / nm linearly chirped fiber Bragg grating LCFBG, and the total dispersion value is 1000 ps / nm; the second dispersion device (9) It consists of two linearly chirped fiber optic LCFBGs input from the opposite end with the same parameters, and the total dispersion value is -1000...

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Abstract

The invention discloses an optics differentiator based on a time-domain pulse shaping system. The optics differentiator comprises a mode-locked fiber laser MLL, a first dispersion device, an erbium-doped fiber amplifier EDFA, a Mach-Zehnder modulator MZM, a polarization controller PC, an arbitrary waveform generator AWG, an optical delay line ODL, a second dispersion device, and a frequency divider. The principle of a time-domain pulse shaping system is used, and spectral filtering characteristic of the differentiator is shifted to time domain from frequency domain. Through rationally designing a modulation signal generated by the arbitrary waveform generator AWG and changing the shape of the modulation signal, differential results in different orders and different bandwidths are obtained, and an optical differentiation function in flexibly adjustable order and bandwidth is realized. Various components used in the optics differentiator belong to common devices, and have good compatibility with an existing optical fiber communication system.

Description

technical field [0001] The invention belongs to the field of optical signal processing, and more specifically relates to a programmable optical differentiator. Background technique [0002] With the rapid increase of communication network transmission rate, the processing of high-speed signals in the electrical domain has approached the limit of rate and bandwidth. The use of photonic technology to realize signal generation, processing and calculation has been proposed as an effective solution to overcome the limit of electrical domain processing. Based on this purpose, some basic functional devices for optical domain signal processing corresponding to electrical domain signal processing have been extensively studied, among which photonic differentiators are an important device. A photonic differentiator is a device that can perform time-domain differential operations on optical signals in the optical domain. It can be used in the fields of optical sensing, optical pulse sh...

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Application Information

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IPC IPC(8): G02F2/00
CPCG02F2/00
Inventor 张敏明唐江刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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