Fiber-optic wireless SSB modulation system with self-adaptive optical carrier ratio

A single-sideband modulation and self-adaptive technology, applied in the transmission system, electromagnetic wave transmission system, electrical components, etc., can solve the problems of low cost performance of the system, easy to be affected by environmental factors, difficult production of key components, etc., and achieve less back reflection , simple structure, high cost performance

Inactive Publication Date: 2018-02-06
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the main problems faced by the optical fiber wireless SSB modulation system at present are: first, the system is cost-effective, difficult to manufacture key components, and easily affected by environmental factors; second, OCSR cannot be adjusted accurately; third, OCSR cannot be self-adaptive System parameter changes

Method used

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  • Fiber-optic wireless SSB modulation system with self-adaptive optical carrier ratio
  • Fiber-optic wireless SSB modulation system with self-adaptive optical carrier ratio
  • Fiber-optic wireless SSB modulation system with self-adaptive optical carrier ratio

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Embodiment 1

[0028] Optical fiber wireless single sideband modulation system with adaptive optical carrier side ratio, such as figure 1 As shown, the system includes: continuous wave laser 1, two-electrode Mach-Zehnder modulator 2, sine wave local oscillator 3, 90 degree power divider 4, bias voltage stabilizer 5, dynamic polarization controller 6, polarization splitter Beamer 7, first long period fiber grating 81, second long period fiber grating 82, polarization beam combiner 9, Y splitter 10, optical fiber 11, first light detector 121, optical interleaver 13, second light detector Detector 122, third photodetector 123, current comparator 14; the specific connection mode is:

[0029] The optical output terminal of the continuous wave laser 1 is connected to the optical input port of the two-electrode Mach-Zehnder modulator 2, the electrical output port of the sine wave local oscillator 3 is connected to the electrical input port of the 90-degree power divider 4, and the 90-degree power divid...

Embodiment 2

[0042] Optical fiber wireless single sideband modulation system with adaptive optical carrier side ratio, such as figure 1 As shown, the system includes: continuous wave laser 1, two-electrode Mach-Zehnder modulator 2, sine wave local oscillator 3, 90 degree power divider 4, bias voltage stabilizer 5, dynamic polarization controller 6, polarization splitter Beamer 7, first long period fiber grating 81, second long period fiber grating 82, polarization beam combiner 9, Y splitter 10, optical fiber 11, first light detector 121, optical interleaver 13, second light detector Detector 122, third light detector 123, current comparator 14; the specific connection mode is:

[0043] The optical output terminal of the continuous wave laser 1 is connected to the optical input port of the two-electrode Mach-Zehnder modulator 2, the electrical output port of the sine wave local oscillator 3 is connected to the electrical input port of the 90-degree power divider 4, and the 90-degree power divi...

Embodiment 3

[0056] Optical fiber wireless single sideband modulation system with adaptive optical carrier side ratio, such as figure 1 As shown, the system includes: continuous wave laser 1, two-electrode Mach-Zehnder modulator 2, sine wave local oscillator 3, 90 degree power divider 4, bias voltage stabilizer 5, dynamic polarization controller 6, polarization splitter Beamer 7, first long period fiber grating 81, second long period fiber grating 82, polarization beam combiner 9, Y splitter 10, optical fiber 11, first light detector 121, optical interleaver 13, second light detector Detector 122, third light detector 123, current comparator 14; the specific connection mode is:

[0057] The optical output terminal of the continuous wave laser 1 is connected to the optical input port of the two-electrode Mach-Zehnder modulator 2, the electrical output port of the sine wave local oscillator 3 is connected to the electrical input port of the 90-degree power divider 4, and the 90-degree power divi...

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Abstract

Optical fiber wireless single sideband modulation system with self-adaptive optical load side ratio, involving optical fiber communication, long-period fiber grating, microwave photon technology, the system includes: continuous wave laser (1), two-electrode Mach-Zehnder modulator (2 ), sine wave local oscillator (3), 90-degree power splitter (4), bias voltage regulator (5), dynamic polarization controller (6), polarization beam splitter (7), first long-period optical fiber Grating (81), second long-period fiber grating (82), polarization beam combiner (9), Y splitter (10), optical fiber (11), first photodetector (121), optical interleaver (13) , a second photodetector (122), a third photodetector (123), and a current comparator (14). The above devices are connected sequentially. The invention can make the change of the optical load side ratio of the single sideband modulation signal adaptive to system parameters, and keep it at 0dB all the time, so as to maintain the system performance in the optimal state.

Description

Technical field [0001] The invention relates to the technical fields of optical fiber communication, long-period optical fiber gratings, and microwave photonics, and specifically is an optical fiber wireless single-sideband modulation system with adaptive optical carrier edge ratio. Background technique [0002] With the increasing demand for information, wireless spectrum resources can no longer meet people's needs. Once the optical fiber wireless communication technology (Radio Over Fiber, ROF) was proposed, it immediately aroused people's interest and carried out extensive and in-depth research. Optical fiber wireless communication, also known as millimeter wave communication or microwave photonics, is an emerging subject with a wide range of research, including optical generation methods of microwave / millimeter wave signals, optical transmission technology of microwave / millimeter wave frequencies, and modulation of microwave / millimeter wave frequencies Technology etc. In op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/516
Inventor 油海东陈龙猛李吉忠李琳马丽敏李爱涛
Owner QINGDAO AGRI UNIV
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