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Millimeter wave carrier forming device and method of radio frequency fiber optic transmission system

A transmission system and radio frequency fiber technology, applied in the field of millimeter wave carrier generation, can solve the problems of crosstalk, low modulation depth and high cost in duplex work

Inactive Publication Date: 2007-01-24
SHANGHAI UNIV
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Problems solved by technology

However, these methods either require precise biased electro-optical modulators or precise coherent lasers or millimeter-wave local oscillator sources and mixers, resulting in a complex structure of the base station and high cost; or the structure of the base station is simplified, but the impact of fiber dispersion is more serious , the modulation depth is not high, there is nonlinear effect, or there is strong radio frequency reflection, and there is crosstalk in duplex work

Method used

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  • Millimeter wave carrier forming device and method of radio frequency fiber optic transmission system
  • Millimeter wave carrier forming device and method of radio frequency fiber optic transmission system
  • Millimeter wave carrier forming device and method of radio frequency fiber optic transmission system

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Embodiment Construction

[0041] A preferred embodiment of the present invention is a 60GHz millimeter wave optical generation device and method applied in a RoF system, which is described in detail as follows in conjunction with the accompanying drawings:

[0042] see figure 1 , the millimeter wave carrier generation device of this radio frequency optical fiber transmission system is made up of central station 1, optical fiber link 2 and base station 3, is characterized in that:

[0043] (1) The central station 1 is composed of a semiconductor laser 1-1, a phase modulator 1-2 and an intensity modulator 1-3 connected sequentially, and a sine wave 1-4 is used to drive the phase modulator 1-2, and the baseband signal 1 -5 is modulated onto the light wave by the intensity modulator 1-3;

[0044] (2) The base station 3 is composed of a periodic optical filter 3-1, an optical detector 3-2, a millimeter wave bandpass filter 3-3, an amplifier 3-4, and an antenna 3-5 connected in sequence.

[0045] The milli...

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Abstract

This invention relates to a carrier generation device and a method for millimeter waves of RF fiber transmission system, in which, said device is composed of a semiconductor laser, a phase modulator, a sine wave drive of a central station, a periodical optical filter, a light detector and a millimeter wave band-pass filter of the base station, which utilizes the phase modulator, applies sine wave to carry out optical scanning to the output optical waves of the semiconductor laser at the central station and utilizes the transmission response wave characteristics of Fabry-Perot optical filter to convert the optical waves with varied frequencies to those with strength variance to get mm wave carriers via the optical detector and mm wave band pass filter, which can generate millimeter waves in the base station by a passive method.

Description

technical field [0001] The present invention relates to a millimeter-wave carrier generation method and device of a radio frequency optical fiber transmission system (RoF, Radio on Fiber), in particular to a central station that uses an electric sine wave to scan the light wave phase, and a base station that uses a Fabry-Perot optical filter to add light detection A method and device for generating a millimeter-wave carrier by an optical frequency sweep method. technical background [0002] As a very competitive development direction of ultra-high-speed wireless communication network (the next generation of high-speed mobile communication and broadband wireless access network), the millimeter wave optical fiber transmission system combines the advantages of millimeter wave and optical fiber to solve the problem of broadband wireless communication network base station Connection problem with central station. It can provide a large number of users with various services such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H01S5/14H04B10/50
Inventor 林如俭修明磊陈新桥张奇
Owner SHANGHAI UNIV
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