Dual homodyne detection system for measuring asymmetric spectra in the far‐infrared regime

1986 ◽  
Vol 57 (4) ◽  
pp. 560-565 ◽  
Author(s):  
T. Tsukishima ◽  
I. Nishida ◽  
M. Nagatsu ◽  
H. Inuzuka ◽  
K. Mizuno
Keyword(s):  
Detection System ◽  
Far Infrared ◽  
Homodyne Detection ◽  
Asymmetric Spectra

scholarly journals Locking the phase of balanced homodyne detection system for squeezed light

2013 ◽  
Vol 62 (8) ◽  
pp. 084204
Author(s):  
Zhang Yan ◽  
Yu Xu-Dong ◽  
Di Ke ◽  
Li Wei ◽  
Zhang Jing
Keyword(s):  
Detection System ◽  
Homodyne Detection ◽  
Squeezed Light

scholarly journals A Real Time Human Detection System Based on Far Infrared Vision

2008 ◽  
pp. 76-84 ◽  
Author(s):  
Yannick Benezeth ◽  
Bruno Emile ◽  
Hélène Laurent ◽  
Christophe Rosenberger
Keyword(s):  
Real Time ◽  
Detection System ◽  
Far Infrared ◽  
Human Detection ◽  
Infrared Vision

Making a Gaussian beam from a diffracted beam for mode-matching in a homodyne detection system

2012 ◽  
Vol 61 (5) ◽  
pp. 735-738
Author(s):  
Hee-Hyun Mun ◽  
Ji-Su Park ◽  
Samyong Bae ◽  
Sun-Hyun Youn
Keyword(s):  
Gaussian Beam ◽  
Detection System ◽  
Mode Matching ◽  
Homodyne Detection

scholarly journals Homodyne Spectroscopy with Broadband Terahertz Power Detector Based on 90-nm Silicon CMOS Transistor

2021 ◽  
Vol 11 (1) ◽  
pp. 412
Author(s):  
Kęstutis Ikamas ◽  
Dmytro B. But ◽  
Alvydas Lisauskas
Keyword(s):  
Continuous Wave ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
High Sensitivity ◽  
Complementary Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Integration Time ◽  
Thz Spectroscopy ◽  
Homodyne Detection ◽  
Cmos Transistor

Over the last two decades, photomixer-based continuous wave systems developed into versatile and practical tools for terahertz (THz) spectroscopy. The high responsivity to the THz field amplitude of photomixer-based systems is predetermined by the homodyne detection principle that allows the system to have high sensitivity. Here, we show that the advantages of homodyne detection can be exploited with broadband power detectors combined with two photomixer sources. For this, we employ a THz detector based on a complementary metal-oxide-semiconductor field-effect transistor and a broadband bow-tie antenna (TeraFET). At 500 GHz and an effective noise bandwidth of 1 Hz, the response from one photomixer-based THz source resulted in an about 43 dB signal-to-noise ratio (SNR). We demonstrate that by employing a homodyne detection system by overlaying the radiation from two photomixers, the SNR can reach up to 70 dB at the same frequency with an integration time 100 ms. The improvement in SNR and the spectroscopic evidence for water vapor lines demonstrated up to 2.2 THz allow us to conclude that these detectors can be successfully used in practical continuous wave THz spectrometry systems.

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