COMPRESSION OF BRIGHT OPTICAL PULSE BY PULSE PAIR IN THE NORMAL DISPERSION REGIME OF SINGLE MODE FIBERS

AbstractBroadband optical frequency combs are extremely versatile tools for precision spectroscopy, ultrafast ranging, as channel generators for telecom networks, and for many other metrology applications. Here, we demonstrate that the optical spectrum of a soliton microcomb generated in a microresonator can be extended by bichromatic pumping: one laser with a wavelength in the anomalous dispersion regime of the microresonator generates a bright soliton microcomb while another laser in the normal dispersion regime both compensates the thermal effect of the microresonator and generates a repetition-rate-synchronized second frequency comb. Numerical simulations agree well with experimental results and reveal that a bright optical pulse from the second pump is passively formed in the normal dispersion regime and trapped by the primary soliton. In addition, we demonstrate that a dispersive wave can be generated and influenced by cross-phase-modulation-mediated repetition-rate synchronization of the two combs. The demonstrated technique provides an alternative way to generate broadband microcombs and enables the selective enhancement of optical power in specific parts of a comb spectrum.

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Dark Soliton Synthesis Using Optical Pulse Synthesizer and Soliton Transmission in Normal Dispersion Regime

Conference on Lasers and Electro-Optics 2012 ◽

10.1364/cleo_si.2012.cm2b.6 ◽

2012 ◽

Author(s):

Ken Kashiwagi ◽

Kiyonobu Mozawa ◽

Yosuke Tanaka ◽

Takashi Kurokawa

Keyword(s):

Optical Pulse ◽

Dark Soliton ◽

Normal Dispersion ◽

Dispersion Regime ◽

Soliton Transmission

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Ultrashort pulses propagation through different approaches of the Split-Step Fourier method

Journal of Mechatronics Engineering ◽

10.21439/jme.v1i3.20 ◽

2018 ◽

Vol 1 (3) ◽

pp. 2

Author(s):

José Stênio De Negreiros Júnior ◽

Daniel Do Nascimento e Sá Cavalcante ◽

Jermana Lopes de Moraes ◽

Lucas Rodrigues Marcelino ◽

Francisco Tadeu De Carvalho Belchior Magalhães ◽

...

Keyword(s):

Energy Conservation ◽

Optical Pulse ◽

Time Window ◽

Fourier Method ◽

Ultrashort Pulses ◽

Nonlinear Effects ◽

Single Mode ◽

Time Algorithm ◽

Optical Pulses ◽

Running Time

Simulating the propagation of optical pulses in a single mode optical fiber is of fundamental importance for studying the several effects that may occur within such medium when it is under some linear and nonlinear effects. In this work, we simulate it by implementing the nonlinear Schrödinger equation using the Split-Step Fourier method in some of its approaches. Then, we compare their running time, algorithm complexity and accuracy regarding energy conservation of the optical pulse. We note that the method is simple to implement and presents good results of energy conservation, besides low temporal cost. We observe a greater precision for the symmetrized approach, although its running time can be up to 126% higher than the other approaches, depending on the parameters set. We conclude that the time window must be adjusted for each length of propagation in the fiber, so that the error regarding energy conservation during propagation can be reduced.

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