Germanium:gallium photoconductors for far infrared heterodyne detection.
نویسندگان
چکیده
Highly compensated Ge:Ga photoconductors have been fabricated and evaluated for high bandwidth heterodyne detection. Bandwidths up to 60 MHz have been obtained with corresponding current responsivity of 0.01 A/W.
منابع مشابه
Statistical Nature of the Infrared Heterodyne Signal ' ' )
1 HETERODYNE detection is a process which has been used in the radiowave, microwave, 1 and optical regions of the electromagnetic spectrum. Recently, the technique has been extended to the middle infrared as well [I-31. This paper discusses theoretical and experimental considerations related to the signal-to-noise ratio and the statistical nature of the coherently detected signal at the 10.6 pm...
متن کاملTeich M C. Infrared heterodyne detection. Proc. IEEE 56:37-46, 1968
Heterodyne experiments have been performed in the middle infrared using the CO2 laser in conjunction with photoconductive Ge:Cu and photovoltaic Pb1-xSnxSe detectors. The observed minimum detectable power is a factor of five to 25 greater than that for the theoretically perfect quantum counter. The technique should prove useful for infrared communications, radar, and heterodyne spectroscopy. [T...
متن کاملInfrared Heterodyne Detection
Heterodyne experiments have been performed m the middle infrared region of the eleetromngwtic spectrum .sinp the C02 laser as a radiation source. Theoretically optimum operation bas been achieved at lrHz heterodyne frqnencies p h o t d w t i v e G e : Cn detectors operated at 4% and at kHz and MHz frequencies using Pb, photovoltaic detectors at 77.K. In aceordance with the tiwry, the minimm det...
متن کاملMid-infrared photothermal heterodyne spectroscopy in a liquid crystal using a quantum cascade laser.
We report a technique to measure the mid-infrared photothermal response induced by a tunable quantum cascade laser in the neat liquid crystal 4-octyl-4'-cyanobiphenyl (8CB), without any intercalated dye. Heterodyne detection using a Ti:sapphire laser of the response in the solid, smectic, nematic and isotropic liquid crystal phases allows direct detection of a weak mid-infrared normal mode abso...
متن کاملHeterodyne Spectroscopy in the Thermal Infrared Region: A Window on Physics and Chemistry
The thermal infrared region contains molecular bands of many of the most important species in gaseous astronomical sources. True shapes and frequencies of emission and absorption spectral lines from these constituents of planetary and stellar atmospheres contain unique information on local temperature and abundance distribution, non-thermal effects, composition, local dynamics and winds. Hetero...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Applied optics
دوره 27 19 شماره
صفحات -
تاریخ انتشار 1988