• Korean Journal of Optics and Photonics
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• v.11 no.2
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• pp.102-107
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• 2000

We propose a new scheme for generating a pedestal-free, femtosecond soliton pulse train by utilizing quasI-adiabatic high order soliton pulse evolution in dispersion decreasing fiber in conjunction with the intermediate pedestal suppression stage. Compression factor over 280 was achieved from lOGHz sinusoidal input, to 176 is soliton pulse train. train.

• Journal of the Optical Society of Korea
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• v.16 no.4
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• pp.425-431
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• 2012

Utilizing the three-dimensional Snyder-Mitchell model with a PT-symmetric potential, we study the influence of PT symmetry on beam propagation in strongly nonlocal nonlinear media. The complex Coulomb potential is used as the PT-symmetric potential. A localized spatiotemporal accessible soliton solution of the model is obtained. Specific values of the modulation depth for different soliton parameters are discussed. Our results reveal that in these media the localized solitons can exist in various shapes, such as single-layer and multi-layer disk-shaped structures, as well as vortex-ring and necklace patterns.

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.96-97
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• 1999

• Korean Journal of Optics and Photonics
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• v.12 no.1
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• pp.48-54
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• 2001

We investigate the generation of the dark spatial soliton and its role of wave guiding in Fe doped$LiNbO_3$ A cw Ar+ laser of 488 nm is used for the generation of the dark spatial soliton. The generation of the dark spatial soliton is observed even at the laser intensity as low as 10 mW/cm2. The self-defocusing effect is observed when the direction of the intensity variation is parallel to the optic axis, while it can't be seen when perpendicular to the axis. So, it is verified that the refractive index change is generated parallel to the optic axis. When 633 nm He-Ne laser beam is injected into the dark spatial soliton, the beam propagates just as in the diffraction free medium. So, it is verified that the dark spatial soliton can act as a waveguide.eguide.

• Current Optics and Photonics
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• v.7 no.5
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• pp.557-561
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• 2023

Ultralow-noise soliton pulse generation over a wider Fourier frequency range is highly desirable for many high-precision applications. Here, we realize a low-phase-noise soliton pulse generation by transferring the low phase noise of a mode-locked laser to a silica microcomb. A 21.956-GHz and a 9.9167-GHz Kerr soliton combs are synchronized to a 2-GHz and a 2.5-GHz mode-locked laser through a fractional optoelectronic phase-locked loop, respectively. The phase noise of the microcomb was suppressed by up to ~40 dB at 1-Hz Fourier frequency. This result provides a simple method for low-phase-noise soliton pulse generation, thereby facilitating extensive applications.

• Proceedings of the Optical Society of Korea Conference
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• 2001.08a
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• pp.190-191
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• 2001

No Abstract.See Full-text

• Proceedings of the Optical Society of Korea Conference
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• 1996.09a
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• pp.62-62
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• 1996

• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.11
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• pp.3012-3023
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• 1996

In this paper, we analyze the compression of optical soliton which is obtained by proceeding the optical pulse in FSDD(Fiber with Slowly Decreasing Dispersion) using both NSE(Nonlinear Schrodinger Equation) and GNSE(General Nonlinear Schrodinger Equation) and compare the results. We replace the FSDD with a sequence of fibers having different dispersion values and pompre the results with those obtained in FSDD. It is found that the same results in peak value and FWHM(Full width Half Maximum) can be obtained by replacing FSDD with a sequence of fibers having proper length. We vary the shape of initial pulse which is the input of FSDD and suggest the condition to obtain higher compression rate.

• Korean Journal of Optics and Photonics
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• v.5 no.2
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• pp.238-244
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• 1994

We numerically studied on the dark solitons propagation for initial amplitude and phase shapes in the normalized nonlinear Schr dinger equation(NLSE) which describes the propagations of optical solitons. As the propagation distance increases, odd dark solitons evolve into a black soliton and pairs of gray solitons which have a different sign of blackness, and even dark solitons evolve into pairs of gray solitons without black solitons. When there exists a black soliton and a gray soliton, even though the initial amplitude shape is same, the sign of blackness of a gray solitons determines whether they would collide or not. We could see that the energy of dark solitons evolve into a couple of solitons of different blackness since there exists a continuous range of dark solitons with arbitrary blackness parameter, and this phenomenon was more clearly seen from the change of phase shapes from that of amplitude shapes. hapes.

• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.110-111
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• 2002

Controllable waveguide of optical vortex solitons is possible by using the rotational characteristics of optical vortices, while the relative phase difference across the soliton profiles can be used to steer the waveguide direction in case of two-dimensional dark solitons. It is important to understand in detail what sources contribute to the rotation of optical vortices to apply optical vortex solitons to the optical switchyard. (omitted)