周期分極LiNbO_3(PPLN)導波路を用いた低雑音位相感応増幅器

Hugues Guillet de Chatellus, Giovanni Di Giuseppe, Alexander V. Sergienko +2 more

We demonstrate the possibility of using periodically poled lithium niobate crystals (PPLN) as a direct source of entangled photon pairs. Two configurations are studied. The first enables the generation of polarization-entangled states from a one-dimensional PPLN structure at different frequencies; the second is dedicated to the production of frequency-entangled states from a bi-dimensional PPLN structure. The engineering of both of these PPLN structures are described from a theoretical perspective.

신상영, 임용식

오현호, 송현채, 신상영

A. Szabo, Benjamin James Puttnam, Dániel Mazroa +2 more

We investigate the phase squeezing performance of an all-optical black-box binary phase-shift keyed phase regenerator constructed from periodically-poled lithium-niobate (PPLN) waveguides. Phase regeneration is performed with different levels of phase noise and constant amplitude noise added to the phase modulated input. We experimentally show that, for moderate phase noise, unwanted phase-to-amplitude noise conversion can be minimized without degradation of the phase squeezing performance, by controlling the signal-to-pump power ratio at the input to the PPLN-based phase-sensitive regenerator.

Puttnam, Szabó, Mazroa +2 more

김홍기, 차명식, 이범구