Transcript TeraTech 2005 - Virginia Diodes, Inc.

Quasi-Optical Detector
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Frequency Range 1001000 GHz
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Silicon Lens
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Performance expected
to ~2 THz
Responsivity 500 V/W
typical
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NEP ~ 10 pW/rtHz
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Antenna directivity 2535 dB nom.
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Sub-ns response time
QOD Responsivity Testing
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Use lens to fully couple source
power to detector
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Responsivity (V/W)
Quasi-Optical Broadband Detectors
Focusing
Mirror
1200
See next page for THz measurement…
1000
800
600
400
200
0
100
200
300
400
Frequency (GHz)
500
Detector
Allows direct measurement
of detector responsivity
Waveguide coupler used to
measure transmitted power
www.vadiodes.com
Source
1
7/17/2015
Focusing
Mirror
600-900 GHz QOD Testing
Quasi-Optical Detector
Voltage (mV)
Removable
mounting plate
10
1
0.1
0.01
600
700
800
Frequency (GHz)
QOD B1-04
Photo of 600-900 GHz Testing
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Source
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QOD
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www.vadiodes.com
WR-1.2ZBD B70
The measured QOD response is comparable or
higher than the waveguide ZBD in the 600-900
GHz band
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1” b/n Tx &
Detector
900
ZBD responsivity 500-1500 V/W over WR1.2 band
QOD and ZBD measured using identical test
setup
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Horn to horn coupling (1” distance) with
no lens
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Provides a relative measurement of two
detectors
Excellent responsivity to > 1 THz
2
7/17/2015