[1] [1] Zeynep ozer,Seher Gok,Hakan Altan,et al.Concentration-Based Measurement Studies of L-Tryptophan Using Terahertz Time-Domain Spectroscopy(THz-TD)[J].Applied Spectroscopy(S0003-7028),2014,68(1):95-100.

[2] [2] Hu B B,Nuss M C.Imaging with terahertz waves[J].Optics Letters(S0146-9592),1995,20(16):1716-1717.

[3] [3] Takuya Akiba,Naoya Kaneko,Koji Suizu,et al.THz-wave sensing via pump and signal wave detection interacted with evanescent THz waves[J].Optics Letters(S0146-9592),2013,38(18):3687-3689.

[4] [4] Andreas Steiger,Mathias Kehrt,Christian Monte,et al.Traceable terahertz power measurement from 1THz to 5THz[J].Optics Express(S1559-128X),2013,21(12):14466-14473.

[5] [5] ZHU Xiaoli,LI Xia.The Design of Dual-Phase Lock-In Amplifier Based on AD630[J].Mechanical & Electrical Engineering Technology,2012,41(06):19-23.

[6] [6] GUO Liang,CHEN Baoming,DONG You′er,et al.On line Measurement About Internal Resistance of Battery Based on AD630[J].Modern Electronics Technique,2011,34(01):128-132.

[8] [8] Analog Devices INC.Balanced Modulator/Demodulator AD630 Datasheet[EB/OL].(2004) http://www.analog.com/static/imported-files/ data_sheets/AD630.pdf.

[9] [9] Mira Naftaly,Richard Dudley.Methodologies for determining the dynamic ranges and signal-to-noise ratios of terahertz time-domain spectrometers[J].Optics Letters(S0146-9592),2009,34(8):1213-1214.

[10] [10] Peter Uhd Jepsen,Bernd M Fischer.Dynamic range in terahertz time-domin transmission and reflection spectroscopy[J].Optics Letters(S0146-9592),2005,30(1):29-31.

[11] [11] Roman J B Dietz,Nico Vieweg,Thomas Puppe,et al.All fiber-coupled THz-TDS system with kHz measurement rate based on electronically controlled optical sampling[J].Optics Letters(S0146-9592),2014,39(22):6482-6485.