In this paper, we consider theoretically some examples of nonlinear photonics devices based on the coherent interaction of light with matter. The examples of these devices are lasers that generate extremely short single–cycle optical pulses based on so–called self–induced transparency coherent passive mode-locking (or coherent mode–locking), ultrafast laser beam deflector, and unipolar pulse generator. Such devices have several advantages compared to standard devices that operate in the regime when the interaction of light with matter is incoherent.
42.25.Bs Wave propagation, transmission and absorption
42.50.Gy Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption
$^1$ITMO University, 197101 St. Petersburg, Russia
$^2$Faculty of Physics, St. Petersburg State University, St. Petersburg 198504, Russia
$^3$Institute of Quantum Optics, Leibniz University Hannover, 30167, Hannover, Germany
$^4$Max Born Institute, Germany, 12489, Berlin
$^5$Vavilov State Optical Institute, 199053 St. Petersburg, Russia
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