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Journal of Computational and Theoretical Nanoscience

Femtosecond Optical Quantum Memory Generation Using Optical Bright Soliton

Iraj Sadegh Amiri, J. Ali

Published Mar 25, 2014• 22 citations
Publisher

Abstract

Optical system of microring resonator is presented to form the femtosecond (fs) memory time of optical soliton signals. Localised soliton pulses can be stored within the microring device using suitable parameters of the system. The optical quantum memory is a solution for storing large amounts of data which is very inexpensive and more importantly, it helps to transport the data between optical communication devices. The integrated optical system of a series of microring resonators and two add or drop systems are presented. This system is used to generate chaotic signals using an input bright soliton pulse. The large output gain is obtained by the self-phase modulation which is required to balance the dispersion effects of the medium. The ultra-short single and multi-spatial and temporal soliton pulses are obtained by using the add/drop filter systems. The results show that the single and multi-soliton pulses can be localised within the microring waveguide while the optical quantum memory time of 83 fs could be generated.

DOI
10.1166/jctn.2014.3521

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Optical system of microring resonator is presented to form the femtosecond (fs) memory time of optical soliton signals. Localised soliton pulses can be stored within the microring device using suitable parameters of the system. The optical quantum memory is a solution for storing large amounts of data which is very inexpensive and more importantly, it helps to transport the data between optical communication devices. The integrated optical system of a series of microring resonators and two add or drop systems are presented. This system is used to generate chaotic signals using an input bright soliton pulse. The large output gain is obtained by the self-phase modulation which is required to balance the dispersion effects of the medium. The ultra-short single and multi-spatial and temporal soliton pulses are obtained by using the add/drop filter systems. The results show that the single and multi-soliton pulses can be localised within the microring waveguide while the optical quantum memory time of 83 fs could be generated.
We propose a system of microring resonators (MRRs) incorporating with an add/drop filter system. Optical soliton can be simulated and used to generate entangled photon, applicable in single and multiple optical switching. Chaotic signals can be generated via the MRRs system. Therefore continuous spatial and temporal signals are generated spreading over the spectrum. Polarized photons are formed incorporating the polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed. Results show the single soliton pulse of 0.7 ps where the multi soliton pulse with FSR and FWHM of 0.6 ns and 20 ps are generated using the add/drop filter system. Here Ultra-short single soliton pulse with FWHM=42 fs can be simulated. These pulses are providing required communication signals to generate pair of polarization entangled photons among different time frame where the polarization control unit and polarizer beam splitter (PBS) are connected to the ring resonator system.
The microring resonator (MRR) system can be used to trap optical solitons.These types of pulses are used to generate entangled photon required for quantum keys.The required information can be provided via the quantum keys.We simulate localized spatial and temporal soliton pulses to form an optical communication used in wireless systems.The input soliton pulses with peak power of 500 and 550 mW are used to generate a spectrum of chaotic signals within the nonlinear medium, where the nonlinear refractive index is selected to n 2 =2.2 x 10 -17 m 2 /W.The ultra-short soliton pulse can be trapped within the 3.52 GHz frequency, where the temporal soliton pulse with FWHM of 25 ps could be simulated and used to generate entangled photon pair.The generated entangled photons are input into a wireless router system which is used to transfer them within a network communication system.The router system is used to receive the information and convert it to analog signals at the end of the transmission link, thus data can be sent to the users via a secured optical communication system using MRRs.
Two systems consist of microring resonators (MRRs) and an add/drop filter are used to generate signals as localized multi wavelengths. Quantum dense encoding can be performed by output signals of selected wavelengths incorporated to a polarization control system. Therefore dark and bright optical soliton pulses with different time slot are generated. They can be converted into digital logic quantum codes using a decimal convertor system propagating along a wireless networks. Results show that multi soliton wavelength, ranged from 1.55m to 1.56m with FWHM and FSR of 10 pm and 600 pm can be generated respectively. Keywords- Micro Ring Resonator, Quantum Dense Coding (QDC), Wireless network communication system generated by a MRR system in a nonlinear medium with given input power and selected parameters [5, 6]. Amiri et al have proposed a technique, which can be used to communication security via the chaotic signals and up and down links of optical soliton pulses in which the use of quantum encoding of output signals is applicable [7]. Amiri et al have projected the use of secured codes applicable in quantum router and network system [8]. We have used a nonlinear MRR system to form the multi wavelength, applicable for quantum codes generation used in wireless network system.
A simple system of an all-optical system for stopping and storing is proposed. A system consists of two microring and a nanoring resonators that can be integrated into a single system. The large bandwidth is generated by a soliton pulse within a Kerr-type nonlinear medium where an all-optical adiabatic and pulse bandwidth compression can be performed. The balance between the dispersion and nonlinear lengths of the soliton pulse exhibits the soliton behavior known as self-phase modulation, which produces a constant optical output. This means that light pulse can be trapped, i.e., stopped optically within the nano waveguide.
In this study, new system of quantum cryptography for network communication is proposed. Multi optical Soliton can be generated and propagate via a nonlinear modified add/drop interferometer system incorporated with a time division multiple access (TDMA) system wherein the transportation of quantum codes is performed. To increase the channel capacity and security of the signals, the PANDA ring resonator is proposed. Chaotic output signals from the PANDA ring resonator are input into the add/drop filter system. Chaotic signals can be filtered by using the add/drop filter system in which multi dark and bright solitons can be obtained and used to generate entangled quantum codes for internet security. In this study soliton pulses with FWHM and FSR of 325 pm and 880 nm are generated, respectively, where the Gaussian pulse with a centre wavelength of 1.55 μm and power of 600 mW is input into the system.
A system of microring resonators (MRRs) is presented to generation entangled photon.Different time slot for continuous variable quantum key distribution (CVQKD) use is applicable in optical wireless link.Chaotic behavior of a soliton pulse within the device can be presented respect to the Kerr nonlinear type of light in the MRR devices.Continuous spatial and temporal signals are generated spreading over the spectrum.The CVQKD is formed using the localized spatial soliton pulse.Here localized temporal soliton with FWHM and FSR of 0.2 ps and 0.58 ns is obtained respectively.The spatial soliton pulse has a FWHM of 80 pm.Transmission of soliton pulse with FWHM of 1.5 ps is simulated along the long distance fiber optics where the polarized photons are formed incorporating with the polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed.