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Novel dark-bright optical solitons conversion system and power amplification
(2009-12-01)
Sarapat, Khuntong
;
Sangwara, Narong
;
Srinuanjan, Keerayoot
;
Yupapin, Preecha P.
;
Pornsuwancharoen, Nithiroth
We propose a new system of the dark-bright solitons conversion using a micro- and nanoring resonators incorporating an optical add/drop filter, where the add/drop filter can be used to convert the dark soliton to a bright soliton. The key advantage of the system is that the detection of the dark soliton pulse is normally difficult due to the low level of input power. First, a dark soliton pulse is input into a microring resonator and then propagated into smaller micro- and nanoring resonators, respectively. Second, the add/drop filter is applied (connected) into the ring system, where the bright and dark solitons are obtained via the drop and through (or throughput) ports of the add/drop filter, respectively. The results obtained have shown that the detected soliton power can be controlled by the input soliton power and the ring resonator coupling coefficient, which is enough power to use in the transmission link. Thus, significant conversion-amplified signals can be achieved. © 2009 Society of Photo-Optical Instrumentation Engineers.
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Novel tunable and storage light source generated by a soliton pulse in a micro-ring resonator system for new soliton communication bands
(2009-08-03)
Ali, Jalil
;
Sarapat, Khuntong
;
Yupapin, Preecha P.
We propose a novel system of broadband source generation using a common soliton pulse (i.e., with center wavelength at 1.55 μm) propagating within a nonlinear micro-ring resonator system. The system consists of a micro-ring resonator system incorporating an add/drop filter, whereby 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, and linear and nonlinear refractive index, we found that the obtained multisoliton pulses have shown the potential of application for dense wavelength-division multiplexing (DWDM), whereby the different center wavelengths of the soliton bands can be obtained via the add/ drop filter, which can be used to increase the communication channel capacity in the communication network. The best free spectra range (FSR) and FWHM of the results obtained are 14 nm and 100 pm, respectively, which allows an increase in channel capacity of at least 10 times in only one center wavelength. © 2009 Society of Photo-Optical Instrumentation Engineers.
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White light generation and amplification using a soliton pulse within a nano-waveguide
(2009-01-01)
Sarapat, Khuntong
;
Ali, Jalil
;
Yupapin, Preecha P.
;
Worrarutkul, Artit
;
Khunnam, Wanchai
We propose a novel system of a nano-waveguide that can be used to generate the continuous optical spectrum, i.e. white light. A system consists of two micro and a nano ring resonators that can be integrated into a single system. The large bandwidth signa is generated by using a soliton pulse propagating within a Kerr type nonlinear medium, whereas the continuous bandwidth or wavelength of light signal can be performed. Results obtained have shown the potential of using such system for white light source generation and amplification, which is discussed. The amplified pulse can be stored within a nano-waveguide, which is allowed to form the continuous spectrum after amplification. Alternatively, the low level solar radiation can be amplified, and the bandwidth signals can also be enlarge. © 2009 Elsevier B.V. All rights reserved.

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