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Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method

A single-sideband modulator and single-sideband modulation technology, which is applied in the field of microwave photonics, can solve the problems of no effective solution and the inability to measure band-pass response devices.

Active Publication Date: 2013-04-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

(2) Since the optical signal input to the photodetector must contain an optical carrier, it is fundamentally determined that the optical device to be tested must be a device with a band-stop response. Response device measurements are powerless
For these two key problems, there are currently no reports of effective solutions

Method used

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  • Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method
  • Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method
  • Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method

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Embodiment Construction

[0024] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0025] The idea of ​​the present invention is to solve the problem that the high-order sidebands (especially the second-order sidebands) existing in the existing optical single sideband modulation affect the dynamic range of the entire system. The optical modulation of the first-order sideband and the use of an optical filter to filter out a first-order sideband, combined with another optical carrier without any operation, thus realizing the single-sideband modulation without the second-order sideband.

[0026] Optical single sideband modulator of the present invention such as figure 2As shown, it includes: an optical beam splitter, a microwave source, an optical intensity modulator, an optical filter, and an optical beam combiner. The input end of the optical beam splitter is connected to the output end of the light source, and the two output ends are...

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Abstract

The invention discloses a light single sideband modulation method. According to the light single sideband modulation method, a light carrier wave is divided into two routes, with regard to one route of the two routes, light intensity modulation of a suppressed even order sideband is conducted at first, then one first-order sideband signal is filtered out from obtained light intensity modulation signals, and finally the one first-order sideband signal which is filtered out is merged with the other route light carrier wave to enable a final light sideband modulation signal to be obtained. The invention further discloses a light single side band modulator, optical device measuring equipment and an optical device measuring method, wherein the light single side band modulator, the optical device measuring equipment and the optical device measuring method adopt the modulation method. The light single sideband modulation method can effectively eliminate influence of second-order sideband of the single sideband signal so as to improve dynamic range of a system. The optical device measuring equipment and the optical device measuring method based on the modulation method can solve the problem of selection of an optical device to be tested and the problem of measuring error caused by the second-order sideband of the sideband signal under the condition of guaranteeing measurement accuracy.

Description

technical field [0001] The invention relates to an optical single sideband modulation method, an optical device measurement device and a measurement method based on the modulation method, and belongs to the technical field of microwave photonics. Background technique [0002] With the rapid development of wireless access and mobile multimedia, high-speed wireless communication has an increasing demand for communication capacity, and large-capacity and low-power wireless communication has become an urgent need. In the past three years, the global mobile data volume has grown at a rate of more than two times per year, and will increase by 18 times in the next five years (see [Cisco Inc., "Cisco visual network index: Global mobile data traffic forecast update, 2011-2016," Feb. 2012.]). In this context, millimeter wave communication has become one of the main development directions because it can provide large frequency band resources, but the high hardware requirements and lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/07
Inventor 潘时龙唐震宙薛敏朱丹郭荣辉顾晓文
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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