Fig. 1: Device schematic and measurement. | Communications Engineering

Fig. 1: Device schematic and measurement.

From: Amorphous silicon intrinsic photomixing detector for optical ranging

Fig. 1

a Schematic of the Intrinsic Photomixing Detector (IPD) integrated on a glass substrate. b Measured fast Fourier transform of the IPD output current demonstrating envelope frequency mixing of two amplitude modulated light signals. The modulation signals of λ1 = 444 nm and λ2 = 636 nm are located at f1 = 1.004723 MHz and f2 = 1.001797 MHz, respectively. The inset shows the mixing frequency fmix = f1 – f2 = 2.926 kHz that is directly generated by the IPD.

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