Spectral compression of chirp-free optical pulses in fibers with exponentially increasing dispersion

Li, Qian; Zhang, Taiwei; Li, Mingfeng

doi:10.1364/josab.34.001796

Cited by 6 publications

(9 citation statements)

References 22 publications

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“…It can be seen that C varies nonlinearly with t. The SPC can be understood from the sign of C at t = 0 [9]. When C is negative, both the low and high frequency components shift towards the center frequency, and SPC occurs [12], [26]. In contrast to negative C, the low and high frequency components shift towards both sides.…”

Section: Qualitative Analysis Of the Spc And Ssfsmentioning

confidence: 97%

“…SPC was firstly demonstrated in optical fibers in 1993 [1]. Self-phase modulation (SPM) can be used to achieve SPC in cascaded single-mode fiber and nonlinear medium [2]- [4], fibers with negatively chirped pulse [5], [6], photonic crystal fibers (PCFs) [7], [8] and dispersion-increasing fiber (DIF) [9]- [12]. However, SPC can only be realized within a narrowband range in these works, which limits its applications in OCT and multichannel communication.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the variations of the GVD and Kerr nonlinearity are crucial. It has been theoretically and experimentally shown that the SPC can be achieved [9]- [12] by increasing the anomalous GVD or decreasing Kerr nonlinearity during the propagation in a tapered nonlinear medium. However, it becomes difficult to taper waveguides at nanoscale.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Spectral Compression of Wavelength-Shifting Soliton and Its Application in Integratable All-Optical Quantization

Mei

Yuan

et al. 2019

IEEE Photonics J.

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In this paper, we numerically demonstrate efficient spectral compression (SPC) of wavelength-shifting soliton in a chalcogenide strip waveguide. It is found that the profiles of group-velocity dispersion (GVD) and Kerr nonlinearity play key roles in determining SPC. After calculating the dispersion of Kerr nonlinearity and Raman spectrum for three kinds of chalcogenide materials, Ge 11.5 As 24 Se 64.5 is chosen as the material for designing the chalcogenide strip waveguide (CSW). The geometric parameters of CSW are optimized to obtain the desired GVD and Kerr nonlinearity. Simulation results show that in the designed CSW, an input spectrum width of 52.04 nm can be compressed to 7.23 nm along with wavelength shift of 17 nm when the input peak power is 25 W. With the input peak power increasing to 75 W, the SPC is slightly weakened, but wavelength shift can be up to 190 nm. The proposed CSW is applied to integrated all-optical quantization and an effective quantization number of 3.66-bit is achieved. It is expected that our research results can find important applications in on-chip integrated spectroscopy, all-optical signal processing, etc.

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Section: Qualitative Analysis Of the Spc And Ssfsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Spectral Compression of Wavelength-Shifting Soliton and Its Application in Integratable All-Optical Quantization

Mei

Yuan

et al. 2019

IEEE Photonics J.

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“…Recently, the SPCs with large compression factor and low sidelobe are achieved in dispersionincreasing fibers (DIFs). At present, linearly [15], [16], comb-profile [17], and exponentially [18] DIFs are developed. Lin et al experimentally achieved the SPC of 102.8-fold in a 1-km long linearly DIF when the pre-chirped input pulses are used [15].…”

Section: Introductionmentioning

confidence: 99%

“…The alignment and connection of the comb fibers increase the complexity and instability of the system. The SPCs of the chirp-free hyperbolic secant and Gaussian pulses were investigated in an exponentially DIF [18]. The optical fibers are used as the desired media for achieving the SPC.…”

Section: Introductionmentioning

confidence: 99%

Mid-Infrared Spectral Compression of Soliton Pulse in an Adiabatically Suspended Silicon Waveguide Taper

et al. 2019

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Spectral compression (SPC) can be used for generating narrow bandwidth and wavelength-tunable light sources, which have important applications in optical communication system, spectroscopy, and nonlinear microscopy. In this paper, we numerically demonstrate the high-degree SPC of the chirp-free femtosecond pulse at wavelength 2.4 μm in a 6-cm long adiabatically suspended silicon waveguide taper. The silicon waveguide taper is designed with a dispersion-increasing profile along the propagation distance z. Simulation results show that the SPC factor can be up to 10.9, along with the brightness-enhanced factor of 8.0 and negligible sidelobe. The impacts of the higher order dispersion, higher order nonlinearity, losses (including linear and nonlinear loss), and variation of Kerr nonlinear coefficient along z on the SPC are also investigated. It is found that variation of Kerr nonlinear coefficient γ(z) and linear loss are the dominant perturbation to the degradation of the SPC performance.

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Highly efficient self-similar spectral compression of hyperbolic secant pulses enhanced by pre-chirping in nonlinear fibres

2019

J. Opt.

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The highly efficient self-similar spectral compression of pre-chirped hyperbolic secant pulses is numerically demonstrated in the nonlinear fibre with the exponentially increasing dispersion. It is found that by implementing a pre-chirping process on chirp-free pulses before spectral compression, the spectral compression factor (SCF) and the brightness enhancement factor (BEF) can be significantly improved. In a 0.8 km long nonlinear fibre with the exponentially increasing dispersion, SCF and BEF can reach 16.12 and 13.17, respectively, which are 40.31% and 6.05% higher than those of chirp-free pulses. Additionally, the proposed technique is superior in terms of SCF, BEF, and pulse quality than spectral compression in the linearly increasing dispersion profile. Further comparison is provided between simulation results of the generalized nonlinear Schrödinger equation and the pulse parameter equations.

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Spectral compression of chirp-free optical pulses in fibers with exponentially increasing dispersion

Cited by 6 publications

References 22 publications

Efficient Spectral Compression of Wavelength-Shifting Soliton and Its Application in Integratable All-Optical Quantization

Efficient Spectral Compression of Wavelength-Shifting Soliton and Its Application in Integratable All-Optical Quantization

Mid-Infrared Spectral Compression of Soliton Pulse in an Adiabatically Suspended Silicon Waveguide Taper

Highly efficient self-similar spectral compression of hyperbolic secant pulses enhanced by pre-chirping in nonlinear fibres

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