Slow-light all-optical soliton diode based on tailored Bragg-grating structure

Li, Hongji; Deng, Zhigui; Huang, Jian; Fu, Shenhe; Li, Yongyao

doi:10.1364/ol.40.002572

Cited by 15 publications

(13 citation statements)

References 32 publications

(42 reference statements)

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“…BG solitons in dual core systems can be a potential candidate for various novel optical devices (e.g., all-optical soliton diode reported in ref. 62). …”

Section: Introductionmentioning

confidence: 99%

Moving Bragg grating solitons in a semilinear dual-core system with dispersive reflectivity

Chowdhury

Atai

2017

Sci Rep

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The existence, stability and collision dynamics of moving Bragg grating solitons in a semilinear dual-core system where one core has the Kerr nonlinearity and is equipped with a Bragg grating with dispersive reflectivity, and the other core is linear are investigated. It is found that moving soliton solutions exist as a continuous family of solutions in the upper and lower gaps of the system’s linear spectrum. The stability of the moving solitons are investigated by means of systematic numerical stability analysis, and the effect and interplay of various parameters on soliton stability are analyzed. We have also systematically investigated the characteristics of collisions of counter-propagating solitons. In-phase collisions can lead to a variety of outcomes such as passage of solitons through each other with increased, reduced or unchanged velocities, asymmetric separation of solitons, merger of solitons into a quiescent one, formation of three solitons (one quiescent and two moving ones) and destruction of both solitons. The outcome regions of in-phase collisions are identified in the plane of dispersive reflectivity versus frequency. The effects of coupling coefficient, relative group velocity in the linear core, soliton velocity and dispersive reflectivity and the initial phase difference on the outcomes of collisions are studied.

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“…BG solitons in dual core systems can be a potential candidate for various novel optical devices (e.g., all-optical soliton diode reported in ref. 62). …”

Section: Introductionmentioning

confidence: 99%

Moving Bragg grating solitons in a semilinear dual-core system with dispersive reflectivity

Chowdhury

Atai

2017

Sci Rep

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“…We should mention that the proposed scheme is different from that reported in the sandwich FBG structure [17] and the photonic bandgap liquid-crystal heterojunctions [31]. We note that the chirped CLCs, which is equivalent to the chirped Bragggratings (CBGs) in FBG [32], can be practically achieved by the experiment [33].…”

mentioning

confidence: 86%

“…This phenomenon has been explained in Ref. [17]: the propagation dynamics of solitons can be approximately considered as a quasi-particle propagating in the setting, which cannot exhibit unidirectional transmission in an effective potential. However, a Gaussian optical pulse that is not an exact solution of the soliton and cannot use the quasi-particle approximation during the time when the pulse is developing into a soliton.…”

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confidence: 99%

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Femtosecond soliton diode on heterojunction Bragg-grating structure

Deng

Lin

et al. 2016

Applied Physics Letters

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We numerically propose a scheme for realizing an all-optical femtosecond soliton diode based on a tailored heterojunction Bragg grating, which is designed by two spatially asymmetric chirped cholesteric liquid crystals. Our simulations demonstrate that with the consideration of optical nonlinearity, not only the femtosecond diode effect with nonreciprocal transmission ratio up to 120 can be achieved, but also the optical pulse evolving into soliton which maintains its shape during propagation through the sample is observed. Further, the influence of pulse width and the carrier wavelength to the femtosecond diode effect is also discussed in detail. Our demonstrations might suggest a new direction for experimentally realizing the femtosecond soliton diode based on the cholesteric liquid crystals.Diode, which allows the nonreciprocal transportation of electric current, is one of the most important electronic devices in the integrated circuit. In optics, the nonreciprocal effect also plays a significant role in the modern information processing as well as in optically integrated devices. However, optical light beam is usually reciprocal and therefore how to transmit optical signal only in one direction and block that in the opposite direction remains a challenging issue.In the past decades, many schemes were proposed to solve this problem. The most significant proposal was based on the optical isolator realized by the Faraday effect in magneto-optical crystals [1]. Since the magneto-optical isolator requires a strong external pump, it hinders the applications in a highly integrated photonic systems. Other schemes were also reported with different principles or materials such as using optoacoustic effect [ [13,14] and parity-time system [15]. We note that although high nonreciprocal transmission ratio could be achieved using these schemes, the shape of the light field after propagating through the devices is usually neglected. Due to diffraction/dispersion as well as the interaction with materials, the light beam might cannot maintain its profile, which would limit the application in optical processing. Recently, linearly-coupled waveguide system in which the unidirectional propagation are expected in the nonlinear regime [16] was reported. Based on the fiber Bragg grating (FBG), a sandwich structure was proposed to realize optical nonreciprocal effect [17]. * Electronic address: yongyaoli@gmail.comWe should mention that with the consideration of optical nonlinearity, these optical waves [16,17] could maintain their profiles during propagation through the nonlinear devices. Indeed, the light wave propagating though these nonlinear systems is in a form of solitons which can preserve its shape during propagation [18][19][20][21][22][23][24][25].In this Letter, we extend the concept of optical diode from picosecond [17] to femtosecond (fs) domain for the first time, which is of particular interest in the ultrafast data processing. However, the realization of fs diode becomes more difficult than that realized in the pic...

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“…16 However, majority of these works neglect the shape of the optical field, which plays a critical role in optical light processing with information after propagating through the devices. Recently, it is reported that soliton-diode in the temporal and spatial domains is realized on the tailored Bragg grating structure 17,18 and discrete waveguide array, 19,20 respectively.…”

Section: Introductionmentioning

confidence: 99%

Discrete soliton diode induced by synthetic gauge phase

Huang

Zhu

et al. 2017

J. Nonlinear Optic. Phys. Mat.

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We demonstrate the nonreciprocal dynamics of discrete solitons (DSs) induced by a uniform synthetic gauge phase (SGP) in one-dimensional waveguide array. The SGP is embedded into the coupling constant between the waveguides, which provides a directional momentum to the propagating fields and creates a nonreciprocal for the system. When a kicked Gaussian wave packet propagates through the waveguide arrays, diode effects are formed. Dependence between the diode effect and the SGP is studied. We found that the threshold of the reverse breakdown of this optical diode exhibits a perfect linear dependence against the SGP, and an extremely high diode quality can be achieved when the initial phase tilt exactly compensates the initial momentum provided by the SGP. Moreover, the direction of the diode can be switched by the direction of the SGP, which brings additional freedom to control the one-way propagation of the DSs. Our finding may have potential application to realizing new devices in high-speed all-optical communications.

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Slow-light all-optical soliton diode based on tailored Bragg-grating structure

Cited by 15 publications

References 32 publications

Moving Bragg grating solitons in a semilinear dual-core system with dispersive reflectivity

Moving Bragg grating solitons in a semilinear dual-core system with dispersive reflectivity

Femtosecond soliton diode on heterojunction Bragg-grating structure

Discrete soliton diode induced by synthetic gauge phase

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