Tunable storage of optical pulses in a tailored Bragg-grating structure

Fu, Shenhe; Li, Yongyao; Liu, Yikun; Zhou, Jianying; Malomed, Boris A.

doi:10.1364/josab.32.000534

Cited by 10 publications

(13 citation statements)

References 41 publications

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“…Here, ε is the strength of each defect and dw is its width [15]. The results of the simulations show that, at different input-pulse intensities, the pulse can be trapped at different defects.…”

Section: (I)mentioning

confidence: 98%

“…In other studies [14,15], concatenated BGs were used to generate slow ultrashort pulses, or even standing ones. Such concatenated BGs are built by linking a linearly chirped grating with a uniform Figure 5.…”

Section: Optical Signal Processing In Chirped Bragg Structuresmentioning

confidence: 99%

“…Recently, the nonlinear propagation of the optical pulse in a silicon chirp Bragg structure was investigated [14,15]. The simulation result shows that the optical pulse can be buffered and released in the silicon chirp Bragg structure.…”

Section: Optical Signal Processing In Chirped Bragg Structuresmentioning

confidence: 99%

“…Theoretical modeling of these processes in some Bragg structures have shown that ultrafast laser pulses can be decelerated, stopped, and buffered; as a result, stationary nonlinear optical frequency conversion can be very efficient, even with a very thin resonant absorption Bragg reflector sample [9][10][11][12][13]. In a tailored optical structure, such as one into which defects and spatial chirp are integrated, various optical logic operations can be efficiently realized [14][15][16]. Recently, BG structures consisting of cholesteric liquid crystals (CLCs), which possess extraordinarily large ultrafast optical nonlinearities due to photonic crystal band-edge enhancement, have also been shown to be highly effective for direct-action compression, or for the stretch and recompression of pico-and femto-second pulses, opening up new possibilities for efficient broadband optical-signal processing [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast Optical Signal Processing with Bragg Structures

Liu

Malomed

et al. 2017

Applied Sciences

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Abstract:The phase, amplitude, speed, and polarization, in addition to many other properties of light, can be modulated by photonic Bragg structures. In conjunction with nonlinearity and quantum effects, a variety of ensuing micro-or nano-photonic applications can be realized. This paper reviews various optical phenomena in several exemplary 1D Bragg gratings. Important examples are resonantly absorbing photonic structures, chirped Bragg grating, and cholesteric liquid crystals; their unique operation capabilities and key issues are considered in detail. These Bragg structures are expected to be used in wide-spread applications involving light field modulations, especially in the rapidly advancing field of ultrafast optical signal processing.

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Section: (I)mentioning

confidence: 98%

Section: Optical Signal Processing In Chirped Bragg Structuresmentioning

confidence: 99%

Section: Optical Signal Processing In Chirped Bragg Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrafast Optical Signal Processing with Bragg Structures

Liu

Malomed

et al. 2017

Applied Sciences

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“…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].…”

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confidence: 99%

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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Soliton-soliton dynamics in a dual-core system with separated nonlinearity and nonuniform Bragg grating

Ahmed

Atai

2019

Nonlinear Dyn

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Tunable storage of optical pulses in a tailored Bragg-grating structure

Cited by 10 publications

References 41 publications

Ultrafast Optical Signal Processing with Bragg Structures

Ultrafast Optical Signal Processing with Bragg Structures

Femtosecond soliton diode on heterojunction Bragg-grating structure

Soliton-soliton dynamics in a dual-core system with separated nonlinearity and nonuniform Bragg grating

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