Phase sensitive amplification based on quadratic cascading in a periodically poled lithium niobate waveguide

Abstract

Abstract:We propose and demonstrate phase-sensitive amplification based on cascaded second harmonic generation and difference frequency generation within a periodically poled lithium niobate waveguide. Excellent agreement between our numerical simulations and proof-of-principle experiments using a 3-cm waveguide device operating at wavelengths around 1550 nm is obtained. Our experiments confirm the validity and practicality of the approach and illustrate the broad gain bandwidths achievable. Additional simulation results show that the maximum gain/attenuation factor increases quadratically with input pump power, reaching a value of ±19.0dB at input pump powers of 33 dBm for a 3 cmlong waveguide. Increased gains/reduced powers for a fixed gain could be achieved using longer crystals.

Phase-Sensitive Wavelength Conversion Based on Cascaded Quadratic Processes in Periodically Poled Lithium Niobate Waveguides

“…From Eq.1 we find that this corresponds to an amplitude ratio of the cSFG/DFG and cSFG/DFG outputs of ~ 0.91:1. In contrast to the experimental results in [3], the large PSS of the combined output is due to the strong attenuation of the quadrature component of the signal rather than the amplification of the in-phase component. Fig.…”

“…Several PSA configurations have been demonstrated based on a number of technologies, such as four-wave mixing (FWM) in highly nonlinear fibers (HNLF) [1], Kerr effects in nonlinear interferometers [2], and cascaded second-order nonlinearities in periodically poled lithium niobate (PPLN) waveguides [3], where the input signal and output signal frequencies are identical. A new kind of PSA based on FWM in a HNLF has recently been experimentally demonstrated which provides phase-sensitive wavelength conversion (PS-WC) [4,5].…”

Nonlinear optics on nano/micro-hierarchical structures on metals: focus on symmetric and plasmonic effects

“…For example, the reports for SHG responses from the GaAs nanoneedles grown by the chemical vapor deposition method [9], the nanocups deposited Au by electron-beam evaporation on to silica nanoparticles [10], the ZnO nanorods grown on glass substrates by means of the low-temperature chemical bath method [11], the Pt nanowires created by the physical vapor deposition method [12], and the Au nanoholes fabricated by the focused ion beam method [13] attracted most researchers. These SHG processes are used in a wide range of applications, such as developing devices for optical processing [14], nonlinear imaging [4], and phase-sensitive amplification [15]. Because nonlinear processes through photon–photon interactions are intrinsically weak, studies on enhancement of nonlinear efficiency are crucial [16].…”

Phase regeneration of DPSK signals in a silicon waveguide with reverse-biased p-i-n junction

“…Alternative nonlinear materials may offer more compact implementations as well as better SBS immunity. Phase-sensitive amplification has been successfully shown by exploiting second order nonlinearities in periodically-poled lithium niobate (PPLN) waveguides [3][4][5]. Recently, the first demonstration of phase-sensitive amplification exploiting third order nonlinearities in a waveguide has been reported using chalcogenide glass [6].…”