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We present an experimental study of the nonlinearity of modified uni-traveling carrier (MUTC) photodiodes at cryogenic temperatures. At 120 K, the amplitude-to-phase (AM-to-PM) conversion nonlinearity is reduced by up to 10 dB, resulting in nearly 40 dB AM-to-PM rejection over a broad photocurrent range.
We demonstrate InP-based modified uni-traveling carrier balanced photodiodes integrated on silicon-on-insulator (SOI) waveguides with an internal responsivity of 0.78 A/W, 14 GHz bandwidth, and >20 dB common-mode rejection ratio (CMRR). The unsaturated RF output power reaches 15.2 dBm at 20 GHz.
An analog fiber optic link that employs a high performance photodiode has achieved high gain of 26.4 dB and 26 dB and low noise figure of 6.1 dB and 6.7 dB at 1 GHz and 10 GHz, respectively.
Two-optical-frequency-comb-based RF channelizer is proposed to slice RF band seamlessly and downconvert to multiple IF bands, with rectangular response in each channel. Without special optical filters, 7-channel 500-MHz-step channelizer is reported.
A novel photonic channelization scheme for a wideband radio-frequency (RF) signal based on an optical frequency comb (OFC), a comb filter, and an optical de-mux is proposed and demonstrated. In the proposed channelizer, the input broadband RF signal is multicast by the OFC, spectrally sliced by a Fabry–Pérot filter (FPF) and then channelized by a regular optical de-mux. Compared to previous proposals,...
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