Soliton comb generation using add-drop ring resonators

The chaotic signals can be generated within the microring resonator (MRR) system when the Gaussian pulse with input power of 120 mW is inserted into the system. Generation of chaotic signals respect to the ring's radius has been studied. The coupling coefficient affects the output power significantly, thus in order to generate signals with higher output power, the smaller coupling coefficient can be used. Here the output power of the system is characterized with respect to the different coupling coefficients of the system.A series of MRRs connected to an add/drop filter system in order to anaylize the soliton signals. The nonlinear refractive index of the MRR is n2=2.2 x 10-17 m2/W. The capacity of the output signals can be increased through generation of peaks with smaller full width at half maximum (FWHM). Here, we generate and characterize the ultra-short optical soliton pulses respect to the ring's radius and coupling coefficients variation of the system. As result, soliton pulses with FWHM and free spectral range (FSR) of 50 pm and 1440 pm are generated.

Jurnal Teknologi, 2011

A system consisting of a series of micro ring resonator (MRR) is proposed. Optical dark and bright soliton pulses propagating through the nonlinear waveguides are amplified. This system can be used in long distance communication system. The dark and bright soliton is input into the designed system. The nonlinear effect contributes to segregation of continuous soliton pulse into smaller pulses. In this way large bandwidth of optical signals can be obtained. The power amplification occurs when the soliton propagates along the MRRs systems. In this research the concern is the generation of amplified pulse of optical dark and bright soliton while propagating in the MRR device. Simulated results show the amplification of bright soliton in which the input power increases from 0.6 W to 10.9331 W and 7.684 W at the trapped wavelength of 1520.428 nm and 1519.912 nm respectively. Key words: Optical soliton; dark soliton; bright soliton; soliton amplification

Microwave and Optical Technology Letters, 2009

2009

We propose a novel system of a broadband source generation using a common soliton pulse (i.e. with center wavelength at 1.55 m) propagating within a nonlinear microring and nanoring resonators system. A system consists of a micro ring resonator system incorporating an add/drop filter, whereas the large bandwidth signals can be generated, stored and regenerated within the system. By using the appropriate parameters relating to the practical device such as micro ring radii, coupling coefficients, linear and nonlinear refractive index, we found that the obtained multi soliton pulses have shown the potential of application for dense wavelength division application, whereas the different center wavelengths of the soliton bands can be obtained via the add/drop filter, which can be used to increase the channel capacity in communication network.

In this paper, we propose a system for chaotic signal generation using a microring resonator (MRR) fiber optic system. This system uses a regular laserdiode as input power and can be incorporated with an optical add/drop filter system. When light from the laser diode feedbacks to the fiber ring resonator, the actual chaotic signal is produced by using the appropriate fiber ring resonator parameters and also the laser diode input power. The filtering process of the chaotic signals occurs during the round-trip of the pulse within the ring resonators. The single soliton pulses generation and bandwidth manipulation of the pulse can be performed using the add/drop system. Results obtained have established particular possibilities from the application. The obtained results show the effects of coupling coefficients on the bandwidth of the single soliton pulse, where the chaotic behaviors of the input pulses are presented.

Optik, 2010

We propose a novel system of a dense wavelength division operation using the nonlinear micro ring resonators system that can be used to generate the broad output light spectra, whereas the significant increasing in channel capacity is obtained. A system consists of two micro and a nano ring resonators incorporating an add/drop filter that can be integrated into a single system. The large bandwidth signal is generated by using a soliton pulse propagating within a Kerr type nonlinear medium. The obtained results have shown the potential of using such a system for broadband light source generation, amplification, storage and regeneration, whereas the amplified signals can be stored within a nano-waveguide, which is allowed to form the regeneration of the broad light spectra after amplification. The advantage is that the specific wavelength of the broadband source, for instance, 1.50μm can provide the super dense wavelength division multiplexing channels, whereas the increasing in chann...

Circuits and Systems, 2010

We propose a novel system of a broadband source generation using a common soliton pulse (i.e. with center wavelength at 1.55 m) propagating within a nonlinear microring and nanoring resonators system. A system consists of a micro ring resonator system incorporating an add/drop filter, whereas the large bandwidth signals can be generated, stored and regenerated within the system. By using the appropriate parameters relating to the practical device such as micro ring radii, coupling coefficients, linear and nonlinear refractive index, we found that the obtained multi soliton pulses have shown the potential of application for dense wavelength division application, whereas the different center wavelengths of the soliton bands can be obtained via the add/drop filter, which can be used to increase the channel capacity in communication network.

2022

In the framework of the nonlinear waveguide, we investigate propagation of solitons with in optical ring resonators. We show how the complicated nonlinear interplay slow light solitons in the MRRs to the possibility to create optical buffer. Dynamical control over slow-light solitons is realized via a controlling field generated by bright soliton. We provide an analytical description for the nonlinear dependence of the velocity of the signal on the controlling field. The buffering effect is achieved by slowing the optical signal using an external control light source to vary the dispersion characteristic of the medium via optical ring resonators. We present a theoretical and simulation investigation of the criteria for achieving slow light in semiconductor microring resonators. The output signal shows the rate of delay time by propagation through the semiconductor optical ring resonators to used optical buffer.

arXiv: Optics, 2018

Bright-soliton frequency comb generation in a thin-film silicon nitride (SiN) microresonator at optical telecommunication wavelengths is numerically demonstrated using our recently developed approach for dispersion-engineering by virtue of coupling-dispersion between two coupled microresonators. By coupling two identical resonators through an asymmetric Mach-Zehnder structure, sinusoidal splitting of the resonance frequencies can be achieved. This enables the engineering of the dispersion of the resulting modes of the coupled structure. Using this approach, anomalous dispersion of the resonant modes can be achieved at the pumping wavelength (which is selected to be the optical telecommunication wavelength, i.e., 1.55 $\mu m$) to enable Kerr-comb generation. In addition, by utilizing soliton-induced Cherenkov radiation in the coupled-resonator structure, we can increase the bandwidth of the resulting Kerr-comb signal.

An external-cavity diode laser for 1550-nm wavelength is reported with ultra-low noise, high power coupled to a fiber, and fast tunability. These characteristics enable the generation of an optical frequency comb in a silica micro-resonator with a single-soliton state. Neither an optical amplifier nor a modulator is used in the experiment. This demonstration greatly simplifies the soliton generation setup and represents a significant step forward to a fully integrated soliton comb system.