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Parity-Time Anti-Symmetric Parametric Amplifier

We describe the process of parametric amplification in a directional coupler of quadratically nonlinear and lossy waveguides, which belong to a class of optical systems with spatial parity-time (PT) symmetry in the linear regime. We identify a distinct spectral parity-time anti-symmetry associated with optical parametric interactions, and show that pump-controlled symmetry breaking can facilitate spectrally selective mode amplification in analogy with PT lasers. We also establish a connection between breaking of spectral and spatial mode symmetries, revealing the potential to implement unconventional regimes of spatial light switching through ultrafast control of PT breaking by pump pulses.

preprint2015arXivOpen access
Diana A. AntonosyanAlexander S. SolntsevAndrey A. Sukhorukov
physics.optics
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Open access3 authors1 topic
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Diana A. AntonosyanAlexander S. SolntsevAndrey A. Sukhorukov

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