Linear Technique for Discrimination of Optically Coded Waveforms Using Optical Frequency Combs
Abbreviated Journal Title
IEEE Photonics Technol. Lett.
Differential balanced photodetection; matched filtering; optical; frequency comb; semiconductor lasers; SEMICONDUCTOR-LASERS; INJECTION LOCKING; Engineering, Electrical & Electronic; Optics; Physics, Applied
We have demonstrated a novel coherent optical detection architecture that serves as a matched filter and successfully discriminates between various encoded optical waveforms with high confidence. The waveforms are produced by encoding the spectral phase of an optical frequency comb with codes from a Walsh-Hadamard set. The encoded optical waveforms are decoded with a coherent detection technique implemented using an optical frequency comb as a set of local oscillators, an interferometer, and a pair of differential balanced photodetectors. The use of only linear optical devices in the receiver results in a higher sensitivity compared to the use of nonlinear optical thresholding and gating techniques. Decoding is demonstrated at power levels of similar to 25 mu W, which are much lower than previously reported. Possible applications of the receiver architecture include laser radar and optical communications in an optical code-division multiple access network.
Ieee Photonics Technology Letters
"Linear Technique for Discrimination of Optically Coded Waveforms Using Optical Frequency Combs" (2012). Faculty Bibliography 2010s. 2304.