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Bandwidth measurements of ultrahigh-frequency optical detectors using the interferometric FM sideband technique

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2 Author(s)
Eichen, Elliot ; GTE Labs. Inc., Waltham, MA, USA ; Silletti, A.

A frequency modulated semiconductor laser and an interferometer are used as a source of very high frequency amplitude modulation to measure the response of optical detectors. This new technique does not require a laser with a flat, or even known, frequency response, and measures the detector response at frequencies well above the modulation frequency applied to the laser. The response of several InGaAs p-i-n detectors has been measured to 22 GHz using 1.3- and 1.55-μm semiconductor lasers modulated at only 500 MHz. These measurements were not limited by the measurement method, which may be capable of measuring bandwidths substantially in excess of 20 GHz.

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Lightwave Technology, Journal of  (Volume:5 ,  Issue: 10 )