NASRIN SULTANA | Hajee Mohammad Danesh Science & Technolgy University, Bangladesh (original) (raw)
Papers by NASRIN SULTANA
Journal of Electrical & Electronic Systems, 2015
Materials today communications, Mar 1, 2023
Materials Today Communications
Laser Congress 2019 (ASSL, LAC, LS&C), 2019
Dispersion spectroscopy with high-speed, high-resolution and wide dynamic range by parallel and s... more Dispersion spectroscopy with high-speed, high-resolution and wide dynamic range by parallel and simultaneous phase measurement using scan-less dual-heterodyne mixing of 1.4- and 50 GHz adjacent frequency intervals of optical frequency comb.
Conference on Lasers and Electro-Optics, 2020
The 2.7ps time resolution of single shot waveform measurement was experimentally performed by mea... more The 2.7ps time resolution of single shot waveform measurement was experimentally performed by measuring on frequency domain using improved optical frequency comb analyzer based on dual-heterodyne mixing in time-division multiplexing.
Conference on Lasers and Electro-Optics, 2020
High-speed dispersion spectroscopy has been developed with wide dispersion range, while avoiding ... more High-speed dispersion spectroscopy has been developed with wide dispersion range, while avoiding an increase in imprecision, by 1.4- and 50 GHz frequency intervals parallel processing of single-shot dual-heterodyne mixing combined with an optical frequency comb.
2012 International Conference on Computer and Communication Engineering (ICCCE), 2012
Increased channel capacity of optical transmission system is obtained either by increasing the bi... more Increased channel capacity of optical transmission system is obtained either by increasing the bit rate of transmission or by using the technique of wavelength division multiplexing (WDM). In long distance communication, higher launched power is required to achieve the required signal to noise ratio. But with the increased launched optical powers, bit rates and the number of wavelength channels, the nonlinear optical effects have been increased. Also, at high bit rate, group velocity dispersion (GVD) limits the transmission distance. Cross-phase modulation (XPM) is an important nonlinear impairment that causes interference through intensity-dependent phase shifts between two optical fields in optical networks using WDM. This effect limits the allowable input optical power and system capacity. The XPM effect with SPM and GVD degrade the system performances significantly. In this research work, a detail analysis have been done to find the mathematical expression for pulse broadening factor by solving nonlinear Schrödinger equation (NLSE) considering the effects of XPM with SPM and GVD in WDM system. By using this mathematical expression, pulse broadening factor has been visualized. The results are evaluated at different bit rates, different input power and varying transmission distance.
Applied Optics, 2019
We present a novel approach to high-speed dispersion spectroscopy that realizes a wide dynamic ra... more We present a novel approach to high-speed dispersion spectroscopy that realizes a wide dynamic range, by simultaneous and parallel phase measurement using scanless dual-heterodyne mixing of 50 and 1.4 GHz frequency intervals. This system can realize parallel measurements of the relative phases between adjacent frequencies by introducing an optical frequency comb and intensity modulator to generate adjacent frequency and arrayed waveguide grating to separate the sidebands. The experimental results using single-mode fibers, whose lengths range from 0 to 92 km, indicated a 26 nm dispersion spectrum, 1785 ps/nm measurement range, and 0.27 ps/nm measurement uncertainty in 1 ms.
Conference on Lasers and Electro-Optics
A scanless dispersion pre-compensation system for an ultrafast 25.6 waveform using multilevel 8-a... more A scanless dispersion pre-compensation system for an ultrafast 25.6 waveform using multilevel 8-ary amplitude and 32-ary phase modulation was controlled and compensated by a 200 GHz optical frequency comb synthesizer with a 6.4 THz bandwidth.
Optics Communications, 2020
Abstract In this study, we propose and demonstrate a dispersion compensation system for an ultraf... more Abstract In this study, we propose and demonstrate a dispersion compensation system for an ultrafast 25.6 Tbps waveform using multilevel 8-ary amplitude and 32-ary phase modulation. The waveform bit period was 312.5 fs, which was controlled and compensated by a 200 GHz optical frequency comb (OFC) synthesizer with a 6.4 THz bandwidth. Dispersion spectra were measured in parallel and simultaneously (within 1 ms), based on single-shot dual-heterodyne mixing by introducing an OFC and arrayed waveguide grating to separate sidebands. An optical pulse synthesizer (OPS) can individually control the phase and amplitude spectra of the OFC. To control transmitted waveforms in a dispersed media, the OPS can be oppositely biased to feed the measured dispersion back into the source waveform when it generates an arbitrary waveform. In this study, a 25.6 Tbps dispersion-free waveform was successfully transmitted through a 10.55 km fiber.
Journal of Electrical & Electronic Systems, 2015
Materials today communications, Mar 1, 2023
Materials Today Communications
Laser Congress 2019 (ASSL, LAC, LS&C), 2019
Dispersion spectroscopy with high-speed, high-resolution and wide dynamic range by parallel and s... more Dispersion spectroscopy with high-speed, high-resolution and wide dynamic range by parallel and simultaneous phase measurement using scan-less dual-heterodyne mixing of 1.4- and 50 GHz adjacent frequency intervals of optical frequency comb.
Conference on Lasers and Electro-Optics, 2020
The 2.7ps time resolution of single shot waveform measurement was experimentally performed by mea... more The 2.7ps time resolution of single shot waveform measurement was experimentally performed by measuring on frequency domain using improved optical frequency comb analyzer based on dual-heterodyne mixing in time-division multiplexing.
Conference on Lasers and Electro-Optics, 2020
High-speed dispersion spectroscopy has been developed with wide dispersion range, while avoiding ... more High-speed dispersion spectroscopy has been developed with wide dispersion range, while avoiding an increase in imprecision, by 1.4- and 50 GHz frequency intervals parallel processing of single-shot dual-heterodyne mixing combined with an optical frequency comb.
2012 International Conference on Computer and Communication Engineering (ICCCE), 2012
Increased channel capacity of optical transmission system is obtained either by increasing the bi... more Increased channel capacity of optical transmission system is obtained either by increasing the bit rate of transmission or by using the technique of wavelength division multiplexing (WDM). In long distance communication, higher launched power is required to achieve the required signal to noise ratio. But with the increased launched optical powers, bit rates and the number of wavelength channels, the nonlinear optical effects have been increased. Also, at high bit rate, group velocity dispersion (GVD) limits the transmission distance. Cross-phase modulation (XPM) is an important nonlinear impairment that causes interference through intensity-dependent phase shifts between two optical fields in optical networks using WDM. This effect limits the allowable input optical power and system capacity. The XPM effect with SPM and GVD degrade the system performances significantly. In this research work, a detail analysis have been done to find the mathematical expression for pulse broadening factor by solving nonlinear Schrödinger equation (NLSE) considering the effects of XPM with SPM and GVD in WDM system. By using this mathematical expression, pulse broadening factor has been visualized. The results are evaluated at different bit rates, different input power and varying transmission distance.
Applied Optics, 2019
We present a novel approach to high-speed dispersion spectroscopy that realizes a wide dynamic ra... more We present a novel approach to high-speed dispersion spectroscopy that realizes a wide dynamic range, by simultaneous and parallel phase measurement using scanless dual-heterodyne mixing of 50 and 1.4 GHz frequency intervals. This system can realize parallel measurements of the relative phases between adjacent frequencies by introducing an optical frequency comb and intensity modulator to generate adjacent frequency and arrayed waveguide grating to separate the sidebands. The experimental results using single-mode fibers, whose lengths range from 0 to 92 km, indicated a 26 nm dispersion spectrum, 1785 ps/nm measurement range, and 0.27 ps/nm measurement uncertainty in 1 ms.
Conference on Lasers and Electro-Optics
A scanless dispersion pre-compensation system for an ultrafast 25.6 waveform using multilevel 8-a... more A scanless dispersion pre-compensation system for an ultrafast 25.6 waveform using multilevel 8-ary amplitude and 32-ary phase modulation was controlled and compensated by a 200 GHz optical frequency comb synthesizer with a 6.4 THz bandwidth.
Optics Communications, 2020
Abstract In this study, we propose and demonstrate a dispersion compensation system for an ultraf... more Abstract In this study, we propose and demonstrate a dispersion compensation system for an ultrafast 25.6 Tbps waveform using multilevel 8-ary amplitude and 32-ary phase modulation. The waveform bit period was 312.5 fs, which was controlled and compensated by a 200 GHz optical frequency comb (OFC) synthesizer with a 6.4 THz bandwidth. Dispersion spectra were measured in parallel and simultaneously (within 1 ms), based on single-shot dual-heterodyne mixing by introducing an OFC and arrayed waveguide grating to separate sidebands. An optical pulse synthesizer (OPS) can individually control the phase and amplitude spectra of the OFC. To control transmitted waveforms in a dispersed media, the OPS can be oppositely biased to feed the measured dispersion back into the source waveform when it generates an arbitrary waveform. In this study, a 25.6 Tbps dispersion-free waveform was successfully transmitted through a 10.55 km fiber.