Journal article
Highly Linear Coherent Receiver with Feedback
We propose and demonstrate a novel coherent receiver with feedback for high-linearity analog photonic links. In the proposed feedback receiver, a local phase modulator tracks the phase change of the signal and reduces the effective swing across the phase demodulator without reducing the transmitted signal.
The signal-to-noise-ratio is thus maintained while linearity is improved. Up to 20-dB improvement in spur-free dynamic range (SFDR) is achieved experimentally. At 3.13 mA of average photocurrent per photodiode, the measured SFDR is 124.3 dBmiddotHz2/3, which corresponds to an SFDR of 131.5 dBmiddotHz2/3 when the link is shot-noise-limited
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2007 |
| Pages: | 940-942 |
| ISSN: | 19410174 and 10411135 |
| Types: | Journal article |
| DOI: | 10.1109/LPT.2007.898811 |
| ORCIDs: | Zibar, Darko |
3.13 mA Analog links Demodulation Intensity modulation Linearity Optical distortion Optical feedback Optical interferometry Optical modulation Optical receivers Optical transmitters Phase modulation coherent communication coherent receiver feedback feedback receiver high-linearity analog photonic links highly linear receiver local phase modulator microwave photonics optical feedback optical fibre communication optical modulation optical receivers optical tracking phase demodulator phase modulation phase-modulation photoconductivity photocurrent photodiode shot-noise-limited link signal transmission signal-to-noise ratio spur-free dynamic range
