Photonic Analog-to-Digital Conversion Technology
HRL LABS LLC MALIBU CA
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This report documents the work undertaken by HRL Laboratories, LLC and its subcontractors, California Institute of Technology and Raytheon Electronics Systems, on the development of multi-GHz photonic analog-to-digital AD conversion technologies PACT. Using an electro-optic modulator, the analog-input to the AD converter was impressed i.e. photonically sampled on a train of low-jitter picosecond pulses wavelength - 1540 rim generated by a mode-locked Er-fiber laser. After photodetection, the electrical outputs of the photodiodes were fed to a variety of electronic quantizers for digitization. Specifically, the HRL Program demonstrated InP-HBT bandpass Delta-Sigma AD converter with 10 bits of resolution, using photonic sampling at 10 GHz. The Program also demonstrated photonic clock distribution to multiple flash AD converters, and a 40 GHz photonic time-interleaved architecture based on wavelength division multiplexed technologies. For the 40 GHz time-interleaved architecture, the program achieved --4 SFDR-bits of resolution. PACT is compatible with antenna remoting systems that utilize fiber optic links for signal distribution.
- Electrooptical and Optoelectronic Devices
- Computer Hardware
- Lasers and Masers