Twin core nonlinear couplers with gain and loss

Chen, Y.; Snyder, Allan W.; Payne, D.N.

doi:10.1109/3.119519

Cited by 126 publications

(107 citation statements)

References 8 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…[15,16]. It was predicted that such structures can offer benefits for all-optical switching in the nonlinear regime, lowering the switching power and attaining sharper switching transition.…”

Section: Nonlinear Coupler and Symmetry Breakingmentioning

confidence: 99%

“…In the last decade, the renewed interest in such structures as realizations of P T symmetric optical systems has led to a series of extensive theoretical and more recently experimental studies. We first consider the effect of Kerr-type nonlinearity, which can modify the refractive index in each of the waveguides, depending on the optical intensity [15,16,[24][25][26][27]. This effect can be modeled by including nonlinear terms in the coupled-mode Eq.…”

Section: Nonlinear Coupler and Symmetry Breakingmentioning

confidence: 99%

“…Even before the PT symmetry concept was introduced, it was suggested that optical systems with gain and loss can improve the operation of nonlinear all-optical switching devices, including the lowering of the switching power [15,16]. The development of PT concept brought a new perspective and stimulated further active investigations of nonlinear effects in PT-symmetric systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonlinear switching and solitons in PT‐symmetric photonic systems

Suchkov

Sukhorukov

Huang

et al. 2016

Laser & Photonics Reviews

345

263

View full text Add to dashboard Cite

One of the challenges of the modern photonics is to develop all-optical devices enabling increased speed and energy efficiency for transmitting and processing information on an optical chip. It is believed that the recently suggested ParityTime (PT) symmetric photonic systems with alternating regions of gain and loss can bring novel functionalities. In such systems, losses are as important as gain and, depending on the structural parameters, gain compensates losses. Generally, PT systems demonstrate nontrivial non-conservative wave interactions and phase transitions, which can be employed for signal filtering and switching, opening new prospects for active control of light. In this review, we discuss a broad range of problems involving nonlinear PT-symmetric photonic systems with an intensitydependent refractive index. Nonlinearity in such PT symmetric systems provides a basis for many effects such as the formation of localized modes, nonlinearly-induced PT-symmetry breaking, and all-optical switching. Nonlinear PT-symmetric systems can serve as powerful building blocks for the development of novel photonic devices targeting an active light control.

show abstract

Section: Nonlinear Coupler and Symmetry Breakingmentioning

confidence: 99%

Section: Nonlinear Coupler and Symmetry Breakingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nonlinear switching and solitons in PT‐symmetric photonic systems

Suchkov

Sukhorukov

Huang

et al. 2016

Laser & Photonics Reviews

345

263

View full text Add to dashboard Cite

show abstract

“…where β j + iα j is the complex propagation constant of waveguide j with a j > 0 (a j < 0) referring to loss (gain), κ/2 is the linear coupling coefficient and γ, σ are the nonlinear SPM and XPM parameters, respectively [32]. The propagation distance is denoted by z and the "transverse" variable t denotes real time for the case of pulse propagation in coupled fibers, or a transverse spatial dimension (t ≡ x) for the case of beam propagation in coupled slab waveguides, depicted in Figs.…”

Section: Coupled Mode Equationsmentioning

confidence: 99%

Stability through asymmetry: Modulationally stable nonlinear supermodes of asymmetric non-Hermitian optical couplers

2017

View full text Add to dashboard Cite

We analyze the stability of a non-Hermitian coupler with respect to modulational inhomogeneous perturbations in the presence of unbalanced gain and loss. At the parity-time (PT) symmetry point the coupler is unstable. Suitable symmetry breakings lead to an asymmetric coupler, which hosts nonlinear supermodes. A subset of these broken symmetry cases finally yields nonlinear supermodes which are stable against modulational perturbations. The lack of symmetry requirements is expected to facilitate experimental implementations and relevant photonics applications.

show abstract

“…The dissipation is balanced by introducing gain into one of the waveguides [2]. Thus, a nonlinear coupler composed of one core with a certain amount of gain and another one with an equal amount of loss switches the entire power to one waveguide [3]. Recently this type of a coupler has attracted a lot of attention as an experimental realisation of a PT -symmetric system [4].…”

mentioning

confidence: 99%

Actively coupled optical waveguides

et al. 2014

View full text Add to dashboard Cite

We consider light propagation through a pair of nonlinear optical waveguides with absorption, placed in a medium with power gain. The active medium boosts the in-phase component of the overlapping evanescent fields of the guides, while the nonlinearity of the guides couples it to the damped out-of-phase component creating a feedback loop. As a result, the structure exhibits stable stationary and oscillatory regimes in a wide range of gain-loss ratios. We show that the pair of actively-coupled (AC) waveguides can act as a stationary or integrate-and-fire comparator sensitive to tiny differences in their input powers.

show abstract

Twin core nonlinear couplers with gain and loss

Cited by 126 publications

References 8 publications

Nonlinear switching and solitons in PT‐symmetric photonic systems

Nonlinear switching and solitons in PT‐symmetric photonic systems

Stability through asymmetry: Modulationally stable nonlinear supermodes of asymmetric non-Hermitian optical couplers

Actively coupled optical waveguides

Contact Info

Product

Resources

About