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Microwave photon linear transmission method and system

A transmission method and microwave photonics technology, applied in the field of microwave photonics, can solve problems such as difficult flexible application and harsh experimental conditions, and achieve the best suppression effect, simple operation, and simple experimental link

Active Publication Date: 2019-04-12
BEIJING UNIV OF TECH
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Problems solved by technology

However, the experimental conditions of this method are very harsh, and multiple bias voltages and input signal powers need to be controlled at the same time, so it is difficult to be flexibly applied in practical applications.

Method used

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  • Microwave photon linear transmission method and system
  • Microwave photon linear transmission method and system
  • Microwave photon linear transmission method and system

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the embodiments, drawings and mathematical derivation.

[0017] A microwave photon linear transmission method and system structure in this embodiment are as follows figure 1 shown.

[0018] Laser 1 adopts a distributed feedback laser (RIO, ORION), and outputs an optical carrier with a center frequency of 1550.31nm, a power of 16dBm, and a line width of 500kHz. The optical carrier enters the PM-DPMZM modulator 3 after passing through the front polarization controller 2, the half-wave voltage of the PM-DPMZM modulator is 3.5V, and the 3dB bandwidth is 22GHz. The PM-DPMZM modulator is composed of two dual parallel Mach-Zehnder modulators (upper arm sub-dual parallel intensity modulator DPMZM-1, lower arm sub-dual parallel intensity modulator DPMZM-2), these two dual parallel intensity modulators There are six corresponding DC bias voltages (DC 11 、DC 12 、 DC 13 、DC 21 、DC 22 、DC 23 )control. ...

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Abstract

The invention provides a microwave photon linear transmission method and system and belongs to the field of microwave photonics. Light carriers generated by a laser are input into a polarization multiplexing double-parallel Mach-Zehnder modulator (PM-DPMZM). Dual-tone radio frequency (RF) signals needing to be transmitted pass a 180-degree electric bridge, thereby obtaining two signals with equalpower and phase difference of Pi. The two signals output by the electric bridge are added to a DPMZM-1 and a DPMZM-2 in upper and lower arms of the PM-DPMZM. Through adjustment of six bias voltages inthe modulator, suppression of second-order and third-order nonlinear distortion is realized. Through adjustment of the bias voltages in the modulator, a system can be adjusted to achieve the second-order or third-order optimum suppression effect. Optical signals output by the modulator enter an erbium-doped fiber amplifier for power amplification, thereby compensating insertion losses in a link.The optical signals enter into a photoelectric detector for frequency beating, thereby obtaining signals transmitted by the system. According to the method, nonlinear distortion of a microwave photonlink is effective suppressed.

Description

technical field [0001] The invention provides a microwave photon linear transmission method and system, which belong to the field of microwave photonics. Background technique [0002] With the increasing demand for frequency bands in applications such as wireless communications, satellite communications, and radar detection, microwave photonics, which has the advantages of large bandwidth, low loss, and strong anti-electromagnetic interference capabilities, is gradually applied to wireless communications, phased array radar, deep applications such as space detection. However, in the microwave photonic link frequency conversion system, due to the nonlinear interval in the photoelectric conversion process of the modulator and detector, the nonlinear distortion of the system is caused. Nonlinear distortion seriously affects the spurious-free dynamic range of the system and degrades the signal quality. [0003] In conventional microwave-photonic links, the dominant nonlinear d...

Claims

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Application Information

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IPC IPC(8): H04B10/50H04B10/588
CPCH04B10/505H04B10/5053H04B10/50595H04B10/588
Inventor 王大勇王云新张弘骉杨登才戎路赵洁杨锋
Owner BEIJING UNIV OF TECH
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