High-speed photonically assisted analog-to-digital conversion using a continuous wave multiwavelength source and phase modulation.
A more simple photonically assisted analog-to-digital conversion system utilizing a cw multiwavelength source and phase modulation instead of a mode-locked laser is presented. The output of the cw multiwavelength source is launched into a dispersive device (such as a single-mode fiber). This fiber creates a pulse train, where the central wavelength of each pulse corresponds to a spectral line of the optical source. The pulses can then be either dispersed again to perform discrete wavelength time stretching or demultiplexed for continuous time analog-to-digital conversion. We experimentally demonstrate the operation of both time stretched and interleaved systems at 38 GHz. The potential of integrating this type of system on a monolithic chip is discussed.
Bortnik
Bartosz J
BJ
Department of Electrical Engineering, University of California Los Angeles (UCLA), Los Angeles, CA 90034, USA. bartb@ucla.edu
Fetterman
Harold R
HR