IR Detectors: Heterodyne and Direct
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In recent years there have been considerable advances in the performance of wide-bandwidth infrared detectors, both for direct and heterodyne detection. In this paper I will discuss briefly the major areas of current detector development, compare various aspects of heterodyne and direct detection, discuss amplifier considerations for wide-bandwidth detection operation, and describe state-of-the-art performance in direct and heterodyne detection. In addition, differences and trade-offs between photodiodes and photoconductors will be discussed, in particular the operating temperature dependence of direct and heterodyne detectors at 10 μm. The content of this paper will be limited to photodiodes and photoconductors in the 1- to 20-μm region with bandwidths in the range of 1 to 100 MHz. This encompasses most of the present detector needs of LIDAR systems for wavelengths beyond the range of efficient photomultipliers.
KeywordsDirect Detection Avalanche Photodiode Minority Carrier Lifetime Heterodyne Detection HgCdTe Photodiode
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- 1.C.E. Hurwitz, “Detectors for the 1.1 to 1.6 μm Wavelength Region,” Optical Engr. 20, 658 (1981).Google Scholar
- 4.J. Meslage, et al., “Fast, High-Gain 1.3 μm HgCdTe Photodiode,” Presented at the 7th European Conf. on Optical Communications, Copenhagen, 8–11 September 1981.Google Scholar
- 6.See articles in IEEE Trans. on Electron Devices ED-27, No. 1 (1980). (Special Issue on Infrared Materials, Devices and Applications).Google Scholar
- 7.R. M. Broudy and V. J. Mazurczyck, “(Hg, Cd)Te Photoconductive Detectors,” in Semiconductors and Semimetals vol. 18 (R.K. Willardson and A.K. Beer, eds) Academic New York (1981).Google Scholar
- 8.M. B. Reine, A. K. Sood, and T. J. Tredwell, “Photovoltaic Infrared Detectors,” in Semiconductors and Semimetals vol. 18 (R.K. Willardson and A.K. Beer, eds.) Academic, New York (1981).Google Scholar
- 9.See Proc. IRIS Specialty Group on Infrared Detectors, Vol. I (1976–1980) (Infrared Information and Analysis Center, ERIM, Ann Arbor, Michigan).Google Scholar
- 15.D. L. Spears, “Theory and Status of High Performance Heterodyne Detectors,” SPIE Vol. 300 (to be published November 1981).Google Scholar
- 16.D. L. Spears, “Extending the Operating Temperature, Wavelength, and Frequency Response of HgCdTe Heterodyne Detectors,” Proc. of the International Conf. on Heterodyne Systems and Technology, Williamsburg, March 25–27, 1980, pp. 309–326 (NASA CP-2138).Google Scholar
- 17.J. F. Shanley and C. T. Flanagan, “n-p (Hg, Cd)Te Photodiodes for 8–14 Micrometer Heterodyne Applications,” ibid, pp. 263–280.Google Scholar
- 19.J. F. Shanley, et al., paper presented at the Lasers’81 conference, New Orleans, December 1981.Google Scholar