We present experimental advances in comparative studies of optical parametric amplification (OPA) in microstructured fused silica solid-core fibers and hollow-core fibers filled with acetylene (C2H2). Both media exhibit third-order nonlinearity, enabling the OPA process in collinear configurations with a high spatial concentration of light power. In the former, non-resonant case, we investigated the parametric amplification via four-wave mixing (FWM) with a degenerate pump by picosecond laser pulses centered at a wavelength of 737 nm. This process ensured the generation of the correlated signal/idler photon pairs that could be parametrically amplified in a similar nonlinear micro-structured fiber. For the resonant acetylene-filled fibers, we present an experimental evaluation of the OPA gain in a degenerate collinear FWM at 1530 nm near the P9 acetylene absorption line. We specifically studied the transformation of amplitude modulation in the quasi-continuous W-scale input pump wave to output phase modulation and vice versa. Our research compares OPA efficiencies and the potential to generate squeezed and entangled light states in resonant and non- resonant fiber-based media.We present experimental advances in comparative studies of optical parametric amplification (OPA) in microstructured fused silica solid-core fibers and hollow-core fibers filled with acetylene (C2H2). Both media exhibit third-order nonlinearity, enabling the OPA process in collinear configurations with a high spatial concentration of light power. In the former, non-resonant case, we investigated the parametric amplification via four-wave mixing (FWM) with a degenerate pump by picosecond laser pulses centered at a wavelength of 737 nm. This process ensured the generation of the correlated signal/idler photon pairs that could be parametrically amplified in a similar nonlinear micro-structured fiber. For the resonant acetylene-filled fibers, we present an experimental evaluation of the OPA gain in a degenerate collinear FWM at 1530 nm near the P9 acetylene absorption line. We specifically studied the transformation of amplitude modulation in the quasi-continuous W-scale input pump wave to output phase modulation and vice versa. Our research compares OPA efficiencies and the potential to generate squeezed and entangled light states in resonant and non- resonant fiber-based media.

Optical and Quantum Sensing and Precision Metrology IIMar 13, 20243 citations

Parametric Amplification of Coupled Atomic and Optical Fields

M. G. Moore, Pierre Meystre

Springer eBooksNov 16, 20071 citation

Influence of Kerr anisotropy in parametric amplification

Nathan G. Drouillard, Fadi Farook, Meerna Albert +4 more

Four-wave parametric amplification can be extended to the TW/cm $^2$ regime using femtosecond pump pulses to amplify nearly octave spanning pulses with gain $> 20$ ~mm $^{-1}$ , which we call Kerr instability amplification. Cross-polarized wave generation exploits Kerr anisotropy to induce a transient intensity-dependent polarization evolution. In this work, we combine Kerr instability amplification with cross-polarized wave generation to simultaneously amplify and rotate the output polarization of a signal beam, and we explore laser and crystal parameters to control the resulting polarization. In 1~mm MgO(100), we amplify linearly polarized light by $2000\times$ orthogonal to the pump and seed polarization. The parametric amplification and polarization rotation offers excellent pulse contrast enhancement for future high-power laser systems. Furthermore, the polarization provides an additional observable to study the nonlinear dynamics occuring in this extreme ultrafast light-matter interaction.Four-wave parametric amplification can be extended to the TW/cm$^2$ regime using femtosecond pump pulses to amplify nearly octave spanning pulses with gain $> 20$~mm$^{-1}$, which we call Kerr instability amplification. Cross-polarized wave generation exploits Kerr anisotropy to induce a transient intensity-dependent polarization evolution. In this work, we combine Kerr instability amplification with cross-polarized wave generation to simultaneously amplify and rotate the output polarization of a signal beam, and we explore laser and crystal parameters to control the resulting polarization. In 1~mm MgO(100), we amplify linearly polarized light by $2000\times$ orthogonal to the pump and seed polarization. The parametric amplification and polarization rotation offers excellent pulse contrast enhancement for future high-power laser systems. Furthermore, the polarization provides an additional observable to study the nonlinear dynamics occuring in this extreme ultrafast light-matter interaction.

arXiv:2506.06871Physical Review AMar 17, 20260 citations

Combined optical nonlinearities for travelling-wave signal processing

Thomas Symul, Kamel Bencheikh, David Eger +2 more

Summary form only given. We propose and demonstrate a travelling-wave nonlinear device for optical signal processing. It is based on the sequential use of a nonlinear phase shift (Kerr-like effect) and a phase sensitive parametric amplification (PSA). Even though it is under first step investigations, this arrangement has already featured interesting optical proprieties, among which: (1) amplification of a weak modulation encoded on a strong optical signal, better than the usual gain of the bare PSA. (2) Sign inversion of the weak modulation with absolute gain greater than unity. (3) Complete suppression of classical noise. For these demonstrations, the processed signal is generated by a pulsed frequency doubled Nd:YLF laser.Summary form only given. We propose and demonstrate a travelling-wave nonlinear device for optical signal processing. It is based on the sequential use of a nonlinear phase shift (Kerr-like effect) and a phase sensitive parametric amplification (PSA). Even though it is under first step investigations, this arrangement has already featured interesting optical proprieties, among which: (1) amplification of a weak modulation encoded on a strong optical signal, better than the usual gain of the bare PSA. (2) Sign inversion of the weak modulation with absolute gain greater than unity. (3) Complete suppression of classical noise. For these demonstrations, the processed signal is generated by a pulsed frequency doubled Nd:YLF laser.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)Nov 11, 20020 citations

Four-wave parametric amplification can be extended to the TW/cm

^2

regime using femtosecond pump pulses to amplify nearly octave spanning pulses with gain

> 20

~mm

^{-1}

, which we call Kerr instability amplification. Cross-polarized wave generation exploits Kerr anisotropy to induce a transient intensity-dependent polarization evolution. In this work, we combine Kerr instability amplification with cross-polarized wave generation to simultaneously amplify and rotate the output polarization of a signal beam, and we explore laser and crystal parameters to control the resulting polarization. In 1~mm MgO(100), we amplify linearly polarized light by

2000\times

orthogonal to the pump and seed polarization. The parametric amplification and polarization rotation offers excellent pulse contrast enhancement for future high-power laser systems. Furthermore, the polarization provides an additional observable to study the nonlinear dynamics occuring in this extreme ultrafast light-matter interaction.