Abstract

We present a photonic technique for generating a frequency- modulated sub-terahertz signal for non-destructive or noninvasive sensing and imaging applications. Large frequency deviation was achieved by using optical phase modulation and heterodyne photomixing with an uni-travelling photodetector. The operation principle is theoretically derived and explained. In addition, the generation of 350-GHz frequency- modulated sub-terahertz signal with 6.7-GHz frequency deviation is experimentally demonstrated, and the possibility of frequencies up to 1 THz and wider frequency deviations is discussed.

© 2010 OSA

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  1. M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
    [CrossRef]
  2. D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
    [CrossRef]
  3. W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
    [CrossRef]
  4. A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
    [CrossRef]
  5. H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
    [CrossRef]
  6. K. Kawase, Y. Ogawa, Y. Watanabe, and H. Inoue, “Non-destructive terahertz imaging of illicit drugs using spectral fingerprints,” Opt. Express 11(20), 2549–2554 (2003).
    [CrossRef] [PubMed]
  7. M. Skolnik, Introduction to Radar Systems, (McGraw-Hill, 2001)
  8. K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
    [CrossRef]
  9. Y. C. Shen and P. F. Taday, “Development and application of terahertz pulsed imaging for nondestructive inspection of pharmaceutical tablet,” IEEE J. Sel. Top. Quantum Electron. 14(2), 407–415 (2008).
    [CrossRef]
  10. H.-J. Song, N. Shimizu, and T. Nagatsuma, “Generation of two-mode optical signals with broadband frequency tunability and low spurious signal level,” Opt. Express 15(22), 14901–14906 (2007).
    [CrossRef] [PubMed]
  11. H.-J. Song, N. Shimizu, T. Furuta, K. Suizu, H. Ito, and T. Nagatsuma, “Broadband-Frequency-Tunable Sub-Terahertz Wave Generation Using an Optical Comb, AWGs, Optical Switches, and a Uni-Traveling Carrier Photodiode for Spectroscopic Applications,” J. Lightwave Technol. 26(15), 2521–2530 (2008).
    [CrossRef]

2009 (1)

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

2008 (3)

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Y. C. Shen and P. F. Taday, “Development and application of terahertz pulsed imaging for nondestructive inspection of pharmaceutical tablet,” IEEE J. Sel. Top. Quantum Electron. 14(2), 407–415 (2008).
[CrossRef]

H.-J. Song, N. Shimizu, T. Furuta, K. Suizu, H. Ito, and T. Nagatsuma, “Broadband-Frequency-Tunable Sub-Terahertz Wave Generation Using an Optical Comb, AWGs, Optical Switches, and a Uni-Traveling Carrier Photodiode for Spectroscopic Applications,” J. Lightwave Technol. 26(15), 2521–2530 (2008).
[CrossRef]

2007 (3)

H.-J. Song, N. Shimizu, and T. Nagatsuma, “Generation of two-mode optical signals with broadband frequency tunability and low spurious signal level,” Opt. Express 15(22), 14901–14906 (2007).
[CrossRef] [PubMed]

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[CrossRef]

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

2003 (2)

A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
[CrossRef]

K. Kawase, Y. Ogawa, Y. Watanabe, and H. Inoue, “Non-destructive terahertz imaging of illicit drugs using spectral fingerprints,” Opt. Express 11(20), 2549–2554 (2003).
[CrossRef] [PubMed]

1996 (1)

D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
[CrossRef]

Abbott, D.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Ajito, K.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Atakaramians, S.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Balakrishnan, J.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Bryllert, T.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Chattopadhyay, G.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Cooper, K. B.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Dengler, R. J.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Ferguson, B.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Fischer, B. M.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Furuta, T.

Gill, J.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Harada, M.

A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
[CrossRef]

Hirata, A.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
[CrossRef]

Inoue, H.

Ito, H.

Jacobsen, R. H.

D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
[CrossRef]

Jones, I.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Kado, Y.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Kawase, K.

Kukutsu, N.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Lee, C.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Lin, H. Y.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Llombart, N.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Mehdi, I.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Mickan, S. P.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Mittleman, D. M.

D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
[CrossRef]

Muramoto, Y.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Nagatsuma, T.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

H.-J. Song, N. Shimizu, T. Furuta, K. Suizu, H. Ito, and T. Nagatsuma, “Broadband-Frequency-Tunable Sub-Terahertz Wave Generation Using an Optical Comb, AWGs, Optical Switches, and a Uni-Traveling Carrier Photodiode for Spectroscopic Applications,” J. Lightwave Technol. 26(15), 2521–2530 (2008).
[CrossRef]

H.-J. Song, N. Shimizu, and T. Nagatsuma, “Generation of two-mode optical signals with broadband frequency tunability and low spurious signal level,” Opt. Express 15(22), 14901–14906 (2007).
[CrossRef] [PubMed]

A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
[CrossRef]

Ng, B. W. H.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Nuss, M. C.

D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
[CrossRef]

Ogawa, Y.

Png, G. M.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Schlecht, E.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Shen, Y. C.

Y. C. Shen and P. F. Taday, “Development and application of terahertz pulsed imaging for nondestructive inspection of pharmaceutical tablet,” IEEE J. Sel. Top. Quantum Electron. 14(2), 407–415 (2008).
[CrossRef]

Shimizu, N.

Siegel, P. H.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Skalare, A.

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

Song, H. J.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Song, H.-J.

Suizu, K.

Taday, P. F.

Y. C. Shen and P. F. Taday, “Development and application of terahertz pulsed imaging for nondestructive inspection of pharmaceutical tablet,” IEEE J. Sel. Top. Quantum Electron. 14(2), 407–415 (2008).
[CrossRef]

Tonouchi, M.

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[CrossRef]

Ung, B. S. Y.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Wakatsuki, A.

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

Watanabe, Y.

Withayachumnankul, W.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Yin, X. X.

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Electron. Lett. (1)

H. J. Song, K. Ajito, A. Hirata, A. Wakatsuki, Y. Muramoto, T. Furuta, N. Kukutsu, T. Nagatsuma, and Y. Kado, “8 Gbit/s wireless data transmission at 250 GHz,” Electron. Lett. 45(22), 1121–1122 (2009).
[CrossRef]

IEEE J. Lightwave Technol. (1)

A. Hirata, M. Harada, and T. Nagatsuma, “120-GHz wireless link using photonic techniques for generation, modulation and emission of millimeter-wave signals,” IEEE J. Lightwave Technol. 21(10), 2145–2153 (2003).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (2)

D. M. Mittleman, R. H. Jacobsen, and M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2(3), 679–692 (1996).
[CrossRef]

Y. C. Shen and P. F. Taday, “Development and application of terahertz pulsed imaging for nondestructive inspection of pharmaceutical tablet,” IEEE J. Sel. Top. Quantum Electron. 14(2), 407–415 (2008).
[CrossRef]

IEEE Trans. Microw. Theory Tech. (1)

K. B. Cooper, R. J. Dengler, N. Llombart, T. Bryllert, G. Chattopadhyay, E. Schlecht, J. Gill, C. Lee, A. Skalare, I. Mehdi, and P. H. Siegel, “Penetrating 3-D Imaging at 4-and 25-m Range Using a Submillimeter-Wave Radar,” IEEE Trans. Microw. Theory Tech. 56(12), 2771–2778 (2008).
[CrossRef]

J. Lightwave Technol. (1)

Nat. Photonics (1)

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1(2), 97–105 (2007).
[CrossRef]

Opt. Express (2)

Proc. IEEE (1)

W. Withayachumnankul, G. M. Png, X. X. Yin, S. Atakaramians, I. Jones, H. Y. Lin, B. S. Y. Ung, J. Balakrishnan, B. W. H. Ng, B. Ferguson, S. P. Mickan, B. M. Fischer, and D. Abbott, “T-ray sensing and imaging,” Proc. IEEE 95(8), 1528–1558 (2007).
[CrossRef]

Other (1)

M. Skolnik, Introduction to Radar Systems, (McGraw-Hill, 2001)

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Figures (3)

Fig. 1
Fig. 1

Schematic diagram of frequency-modulated sub-terahertz signal generation.

Fig. 2
Fig. 2

Experiment setup for generating frequency-modulated sub-terahertz signal.

Fig. 3
Fig. 3

Measured time-traces (left) and spectra (right) for several modulation indices. Red dotted lines in the spectra are spectral envelopes calculated using Eq. (7)

Equations (10)

Equations on this page are rendered with MathJax. Learn more.

Δ f m = m F M × f 0
e 1 ( t ) = E 1 × exp { j ( 2 π ν 1 t θ 1 ) }
e P M ( t ) = e 1 ( t ) × L P M exp { j π V π k ( t ) }
e i n ( t ) = e 2 ( t ) + e 1 ( t ) × L P M exp { j π V π k ( t ) } = { E 1 L P M × exp ( j ( 2 π f T H 2 t + π V π k ( t ) + θ 1 ) ) + E 2 × exp ( j ( 2 π f T H 2 t + θ 2 ) ) } exp ( j 2 π ν c t )
i T H ( t ) = Re [ × | e i n ( t ) | 2 ] = × ( | E 1 L P M | 2 + | E 2 | 2 ) + × 2 | E 1 L P M E 2 * | cos ( 2 π f T H t + π V π k ( t ) + θ 1 θ 2 )
k ( t ) = k 0 sin ( 2 π f F M t ) = k 0 sin ( 2 π f F M t ) t d t
i T H ( t ) = I D C + A T H cos [ 2 π ( f T H + π V π k 0 f F M cos ( 2 π f F M t ) ) d t + θ 1 θ 2 ]
f ( t ) = f T H + π V π k 0 f F M cos ( 2 π f F M t )
Δ f m = π k 0 f F M V π
i T H ( t ) = I D C + A T H cos [ 2 π 0 t ( f T H + 1 2 V π k ( τ ) τ ) d τ + θ 1 θ 2 ]

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