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Coded excitation of broadband terahertz using optical rectification in poled lithium niobate
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10.1063/1.2149969
/content/aip/journal/apl/87/25/10.1063/1.2149969
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/25/10.1063/1.2149969
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup for coded excitation of broadband terahertz. The emitter is a PLN crystal. The optical probe beam passes through a Glan-Thompson (GT) polarizer, a quarter-wave plate (QWP) and a Wollaston prism (WP) before illuminating a balanced photodetector (BPD).

Image of FIG. 2.
FIG. 2.

Pitch-catch measurement of coded excitation. (a) Encoded wave form. The axis is time in ps and the axis is the normalized signal amplitude. (b) Zoom view of a portion of the encoded signal. The arrows indicate phase flips in the signal. (c) Digitally compressed signal. (d) Spectra of the two signals. The encoded and decoded spectra are shown by the gray and black curves, respectively. The axis is frequency in THz, while the axis is normalized magnitude in dB.

Image of FIG. 3.
FIG. 3.

(a) Geometry for two-dimensional imaging. (b) Synthetic terahertz array and the image plane. (c) An encoded signal from the data set. (d) The same signal after decoding by pulse compression filter.

Image of FIG. 4.
FIG. 4.

(a) Reconstructed image from decoded data set using PLN emitter. (b) Reconstructed image using a ZnTe emitter. The scale bar represents in the image plane.

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/content/aip/journal/apl/87/25/10.1063/1.2149969
2005-12-14
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Coded excitation of broadband terahertz using optical rectification in poled lithium niobate
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/25/10.1063/1.2149969
10.1063/1.2149969
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