Unlock instant, AI-driven research and patent intelligence for your innovation.

Multi-frequency millimeter-wave generation device based on single-drive Mach-Zehnder modulator

A generation device and modulator technology, applied in the direction of modulation carrier system, optical fiber transmission, digital transmission system, etc., can solve the problems of large insertion loss, increased system cost, difficult adjustment, etc., and achieve strong practicability, simple structure, and easy control Effect

Inactive Publication Date: 2016-05-25
SHANGHAI JIAOTONG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the existing technical solutions, there is a solution based on four-wave mixing, but this solution requires a large input power and another excitation light source, which increases the cost. There are also solutions based on complex modulators or cascaded modulators. solution, which has problems such as large insertion loss and difficult adjustment
[0003] After searching the existing literature, it was found that in the "Optical millimeter-wave signal generation using frequency quadrupling technique and no optical filtering (based on quadrupling frequency quadrupling technique and no optical filtering)" in Volume 20 of "IEEE Photonic Technology Letters (IEEE Photonic Technology Letters)" in 2008, the technology uses a The integrated dual-parallel Mach-Zehnder modulator (DPMZM) directly generates quadrupled millimeter waves, but this method requires complex electrical signal processing, resulting in high electrical insertion loss, and requires the use of high-performance high-frequency electrical devices , which increases the cost of the system; not only that, the scheme needs to adjust three bias voltages, which increases the complexity of the system
[0004] After searching, it was found that in the 2008 Asian Optical Communications Conference (ACP2008) paper "Generation of 60-GHz Optical Millimeter-Wave and 20-GHz Channel-Spaced Optical Multicarrier Using Two Cascaded 10-GHz Modulators (based on cascaded 10-GHz modulators to generate 60-GHz optical millimeter waves and 20-GHz spacing In the multi-carrier scheme)", a scheme based on cascaded single-drive Mach-Zehnder (SDMZM) is proposed, which can generate six-fold frequency millimeter waves, but this scheme requires cascaded modulators, which increases the optical domain insertion loss and System cost; in addition, this scheme also requires strict control of the phase of the two modulators, increasing the complexity of the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-frequency millimeter-wave generation device based on single-drive Mach-Zehnder modulator
  • Multi-frequency millimeter-wave generation device based on single-drive Mach-Zehnder modulator
  • Multi-frequency millimeter-wave generation device based on single-drive Mach-Zehnder modulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown, including: laser CW, polarization controller PC used to adjust the polarization state of continuous laser, single-drive Mach-Zehnder modulator SDMZM, radio frequency signal source RFS, radio frequency signal amplifier PA, stabilized power supply PS and photodetector PD , Where: the continuous laser output by the laser CW is adjusted by the polarization controller PC and then sent to the single-drive Mach-Zehnder modulator SDMZM, and the RF signal output by the RF signal source RFS is amplified by the RF signal amplifier PA and sent to the single-drive Mach-Zehnder modulation The power supply PS is used to adjust the bias voltage of the single-drive Mach-Zehnder modulator SDMZM. ​​The output terminal of the single-drive Mach-Zehnder modulator SDMZM is connected to the photodetector PD so that the output optical signal is converted into an electrical signal. To get the millimeter wave.

[0026] The electro-optical transfer function curve of the single...

Embodiment 2

[0031] The device of this embodiment is the same as that of the first embodiment.

[0032] image 3 It is a schematic diagram and simulation results of generating six times the frequency. The specific implementation process is as follows:

[0033] In this embodiment, the working wavelength of the laser CW is 1550 nm, and the output frequency of the radio frequency signal source RFS is 10 GHz; the Mach-Zehnder modulator SDMZM is adjusted to work at the lowest point of the modulation curve by adjusting the stabilized power supply PS, resulting in even harmonics Suppressed, only odd harmonic components. Such as image 3 a) As shown, by adjusting the output voltage of the RF amplifier, it can be obtained that the Mach-Zehnder modulator SDMZM works at point A. At this time, relative to the third-order component, the first-order component, the fifth-order component and the high-order component are very small , So that you can get a six-fold signal in the optical domain, such as image 3...

Embodiment 3

[0035] The device of this embodiment is the same as that of the first embodiment.

[0036] Figure 4 It is the schematic diagram and simulation results of generating eight times the frequency. The specific implementation process is as follows:

[0037] In this embodiment, the working wavelength of the laser CW is 1550 nm, and the output frequency of the radio frequency signal source RFS is 10 GHz; the Mach-Zehnder modulator SDMZM is adjusted to work at the highest point of the modulation curve by adjusting the stabilized power supply PS, resulting in odd harmonics Suppressed, only even harmonic components. Such as Figure 4 a) As shown, by adjusting the output voltage of the RF amplifier, it can be obtained that the Mach-Zehnder modulator SDMZM works at point A. At this time, relative to the fourth-order component, the fundamental frequency component, the second-order component, the fourth-order component and the higher-order component The components are very small, so an eight-fo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of optical fiber communication, and relates to a multiple frequency millimeter wave generating device based on a single-drive Mach-Zehnder modulator. The multiple frequency millimeter wave generating device comprises a laser device, a polarization controller, the single-drive Mach-Zehnder modulator, a radio frequency signal source, a radio frequency signal amplifier, a voltage stabilization power source and a photoelectric detector, wherein the polarization controller is used for adjusting the polarization state of a continuous laser. The continuous laser output by the laser device is adjusted through the polarization controller and then is transmitted to the single-drive Mach-Zehnder modulator, and a radio frequency signal output by the radio frequency signal source is amplified through the radio frequency signal amplifier and then is transmitted to the single-drive Mach-Zehnder modulator. The voltage stabilization power source is used for adjusting the bias voltage of the single-drive Mach-Zehnder modulator. An output end of the single-drive Mach-Zehnder modulator is connected with the photoelectric detector, so that an output optical signal is converted to an electric signal, and then a millimeter wave is obtained. The multiple frequency millimeter wave generating device is simple in structure, low in cost, easy to control, high in flexibility and strong in practicality.

Description

Technical field [0001] The invention relates to a device in the technical field of optical fiber communication, in particular to a multi-frequency millimeter wave generating device based on a single-drive Mach-Zehnder modulator. Background technique [0002] As we all know, the available bandwidth of electromagnetic waves is about one-tenth of its frequency, so the millimeter wave band has a large communication bandwidth, and can transmit wireless signals at a large rate. In recent years, research on millimeter waves has attracted more and more attention. The electrical domain can generate millimeter waves, but its cost is relatively high, and its electrical bandwidth is also limited. Therefore, the academic community proposes to use photon multiple frequency method to generate millimeter waves. The specific principle is as follows: modulate the low-speed radio frequency signal onto the optical carrier, and through the transformation in the optical domain, obtain the optical mil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2575H04L27/00
Inventor 张亮胡小锋曹攀庄志明苏翼凯
Owner SHANGHAI JIAOTONG UNIV