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Characterization of Power-to-Phase Conversion in High-Speed P-I-N Photodiodes
By: Diddams, S.; Joshi, A.; Quinlan, F.; Nelson, C.; Hati, A.; Datta, S.; Taylor, J.;
2011 / IEEE
This item was taken from the IEEE Periodical ' Characterization of Power-to-Phase Conversion in High-Speed P-I-N Photodiodes ' Fluctuations of the optical power incident on a photodiode can be converted into phase fluctuations of the resulting electronic signal due to nonlinear saturation in the semiconductor. This impacts overall timing stability (phase noise) of microwave signals generated from a photodetected optical pulse train. In this paper, we describe and utilize techniques to characterize this conversion of amplitude noise to phase noise for several high-speed (>; 10 GHz) InGaAs p-i-n photodiodes operated at 900 nm. We focus on the impact of this effect on the photonic generation of low phase noise 10-GHz microwave signals and show that a combination of low laser amplitude noise, appropriate photodiode design, and optimum average photocurrent is required to achieve phase noise at or below -100 dBc/Hz at 1 Hz offset for a 10-GHz carrier. In some photodiodes, we find specific photocurrents where the power-to-phase conversion factor is observed to go to zero.
Power-to-phase Conversion Factor
Optical Power Incident
Overall Timing Stability
Optical Pulse Train
Laser Amplitude Noise
Wavelength 900 Nm
Frequency 10 Ghz
Measurement By Laser Beam
Photonics And Electrooptics
Engineered Materials, Dielectrics And Plasmas
High-speed P-i-n Photodiodes