1、 Terahertz Range Communication Shaoxuan Wang IVEM 146100第一頁(yè)，共24頁(yè)。 3.An experiment of THz communication 1.The introduction of THz 2.The applications of THz Content 4.The commercial products of THz第二頁(yè)，共24頁(yè)。The Introduction of THz“Terahertz radiation occupies a middle ground between microwaves and infr

2、ared light waves，it s frequency range is from 0.3THz 3THz, wavelengths of radiation in the terahertz band correspondingly range from 1 mm to 0.1 mm and technology for generating and operating it is in its infancy，so it is a emerging discipline in the physics.10310610910121015101810211024100MF， HF， V

3、HF， UHF， SHF， EHF微波可見光kilomegagigaterapetaexazettayottax-射線g 射線THz 間隙Hz頻率 (Hz)1 THz 1 ps 300 m 33 cm-1 4.1 meV 47.6 Kdcclassical transportquantum transition第三頁(yè)，共24頁(yè)。Figure2. Application of THz6第四頁(yè)，共24頁(yè)。Figure2：THz imaging in the security7第五頁(yè)，共24頁(yè)。 THz application in MedicineFigure3：THz imagininga an

4、d b) and absorption coefficient images of the samples: (c and d)8第六頁(yè)，共24頁(yè)。Xi-Cheng ZhangShort BiographyDr. Zhang was the Professor and Acting Head of the Department of Physics in University of Rochester, professor Zhangs research interests center around Terahertz waves. His research is focused on th

5、e generation, detection, and applications of free-space THz beams with ultrafast optics9.Jianquan YaoBiographyLaser and Non-Linearity Expert, Director of the Chinese Optical Society. Professor Yao Jianquan has long been engaged in the research of nonlinear optical frequency laser and converter techn

6、iques 10.第七頁(yè)，共24頁(yè)。Figure4:This is a diagram of THz generator 12C band laser is a wave length between 1530 and 1565nm11;UTC-PD is a device that can generate CW THz radiation and make the best use of the telecom-based technology (1550 nm)16.第八頁(yè)，共24頁(yè)。Figure5. 0.14THz 10Gbps wireless communication syste

7、m12At first we encode the 10Gbps data at the transmitter, then the signal is modulated by the device of 16QAM,which is a digital modulated conversion. Finally the signal is converted to a carrier frequency of 6GHz and the bandwidth of 3.6GHz ,and the we use the KaLo generator to change the signals f

8、requency into about 133.8GHz ,the last we emit the signal by a antenna. The receiver process is opposite to the transmitter12.第九頁(yè)，共24頁(yè)。Figure6:Performance of 0.14 transmitter and receiver10The core component of transmitter and receiver is the 0.14THz sub-harmonic mixer , which is a device based on S

9、chottky diode. 第十頁(yè)，共24頁(yè)。Figure8:500 m distance 10Gbps transmission test12第十一頁(yè)，共24頁(yè)。Figure9:500m distance 10Gbps wireless communication experiment12第十二頁(yè)，共24頁(yè)。THz commercial productsTHz technology will have a strong competitive edge in the IT field. From now on, there are many companies engaged in wor

10、k related to the commercialization of THz technology in the world. For example, the AB Millimeter company of France13 , the NTT company of Japan14 ,and the Microtech company of the US15 are all the leaders of THz field. There are so many commercial products which is produced by this three corporatio

11、ns, The following are their products. 第十三頁(yè)，共24頁(yè)。The products of AB Millimeter Company The products of AB Millimeter Company Figure10:600-1000GHz Submillimeter wave sources15The subteraherz source HG-wr1.2-FB-DH provides 0.001-0.01 mW output power in the spectral range 660-1000 GHz15第十四頁(yè)，共24頁(yè)。 The pr

12、oducts of AB Millimeter Company FrequencyDynamic Range200GHz102dB300GHz90dB400GHz74dB500GHz60dB600GHz45dB700GHz75dB820GHz60dB920GHz45dB1000GHz30dBFigure11:MVNA-8-350Vector Network Analysis System16第十五頁(yè)，共24頁(yè)。The products of NTT Company The products of NTT Company Figure12 : Device of NTT company in T

13、Hz imagining and communication16第十六頁(yè)，共24頁(yè)。The products of NTT Company The products of NTT Company UTC-PD (uni-traveling-carrier photodiode) photomixers are ideal to generate CW THz radiation, making the best use of the telecom-based technology (1550 nm). Two-types of UTC-PD photomixer modules are av

14、ailable: a waveguide-coupled module suitable for THz communication experiments, and an antenna-integrated module which can be used as radiation source for THz spectroscopy and imaging16.第十七頁(yè)，共24頁(yè)。The products of US Microtech InstrumentsFigure13:THz detector17The detector is designed for registration

15、 of the THz wave ,a square wave modulation of wave and a saw-tooth of signal voltage from the detector is proportional to intensity the intensity of the radiation. A black filter is filled in the detector to prevent the visible and infrared waves. 第十八頁(yè)，共24頁(yè)。Figure14. The parameter of the THz detecto

16、r第十九頁(yè)，共24頁(yè)。Conclusion 1.THz can be obtained for the wireless communication transmission rate of 10GB/s . Compared with the current ultra broadband technology, it is hundreds or thousands of times faster than ultra broadband communication. 2.Compared the infrared-ray ,it also has a very high ability

17、to penetrate the fog and a strong cloud directivity . This makes THz bandwidth of the communication can be carried out extremely high security communications in harsh environment. 3. Although there are many advantages of THz communication system, there are also have so many constraints, such as, Lac

18、k of emission source and the detector at room temperature; THz signal modulation and processing are remains the focus of study.第二十頁(yè)，共24頁(yè)。References1 X.-C. Zhang , Center for THz Research Rensselaer Polytechnic Institute, USA.“Resent Progress for THz Science & Technology (PPT)20/11/2.K.Namjou,S.C

19、hai,E.A.Whittaker,J.Faist,C.Gmachl,F,capasso,D.L.Sivco,and A.Y.Cho.Sensitive absorption spectroscopy with a room-temperature distributed-feedback quatum-cascade laser. Optics Letters,23(3):219-221,February 1998.THz imaging and sensing for security applications explosive,weapons and drugs.Semiconduct

20、or Science and Technology,20054.A.Y.Pawar,D,D,Sonawane,K.B.Eranade,andD.V.Derle.Terhertz technology and its applications. Drug Invention Today,5:157-163,5Reeno Reeder,Development and Optimisation of Modelling Methods and Algorithms for Terahertz Range Raduation Source s based on Quantum Well Heteros

21、tructures.ISBN978-9949-23-609-1 6 Jian-quan Yao,Professor and Director, Institute of Laser & Opto-electronics,Tianjin University, “THz-Technology and Its Application Foreground(PPT),07/09/7 Faustino Wahaiaa, , , Gintaras Valusisb, a, Ablio Almeidaa, Joaquim A. Moreiraa, Patricia C. Lopesa, Jan Macutkevicb, Irmantas Kasalynasb, Dalius Seliutab,Ramunas Adomaviciusb, Rui Henriquec, Machado Lopesd “Detection of