Wideband calibration of photodetector frequency response based on optical heterodyne measurement

In this article, an accurate wideband calibration method for photodetector frequency response measurement by optical heterodyne measurement technique, which uses two single-mode tunable lasers operating near the wavelength of 1.55 mm, has been proposed. The errors introduced by extra fixture as well as laser output fluctuations were considered and eliminated simultaneously. Experimental result indicates that significant improvement in measurement accuracy has been achieved in the frequency range from 0 to 48.65 GHz, and the calibrated photodetector frequency response is matched well with the standard data provided by the manufacturer. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 44–48, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23957

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