Md Samiul Alam
YOU?
Author Swipe
View article: A Cross-Sectional Study on Knowledge, Attitude and Practice Towards COVID-19 of the Residents of Nagarkanda Upazila, Faridpur District
A Cross-Sectional Study on Knowledge, Attitude and Practice Towards COVID-19 of the Residents of Nagarkanda Upazila, Faridpur District Open
Bangladesh experienced four major waves of COVID-19, the first one of which transpired in March of 2020. From its early onset the government of Bangladesh has taken several precautionary measures which include generating public awareness a…
View article: Next-Generation O-Band Coherent Transmission for 1.6 Tbps 10 km Intra-Datacenter Interconnects
Next-Generation O-Band Coherent Transmission for 1.6 Tbps 10 km Intra-Datacenter Interconnects Open
With the exponential growth of internet traffic, driven by the increasing number of connected devices and data-intensive applications, there is an urgent need to address the surging demand for higher capacity in datacenter communications. …
View article: TFLN MZMs and Next-Gen DACs: Enabling Beyond 400 Gbps IMDD O-Band and C-Band Transmission
TFLN MZMs and Next-Gen DACs: Enabling Beyond 400 Gbps IMDD O-Band and C-Band Transmission Open
As internet traffic demand continues to increase, high-speed electro-optic modulators and high-bandwidth RF components are needed to stretch intensity modulation direct detection (IMDD) systems to their limits. In this study, we experiment…
View article: Beyond 300 Gbps Short-Reach Links Using TFLN MZMs With 500 mV<sub>pp</sub> and Linear Equalization
Beyond 300 Gbps Short-Reach Links Using TFLN MZMs With 500 mV<sub>pp</sub> and Linear Equalization Open
Driven by the growing data demand and the stringent power constraints on short-reach datacenter interconnects (DCI), this work compares the driver-less (RF driver-free) transmission performance of thin-film lithium niobate (TFLN) Mach-Zehn…
View article: Unamplified Coherent Transmission of Net 500 Gbps/Polarization/λ for Intra-Datacenter Interconnects
Unamplified Coherent Transmission of Net 500 Gbps/Polarization/λ for Intra-Datacenter Interconnects Open
To keep up with the growing data traffic demand, spectrally efficient coherent systems are envisioned to replace intensity modulation direct detection (IMDD) systems in short-reach intra-datacenter interconnects (DCI). In this work, we cha…
View article: Design, analysis, and characterization of a compact silicon photonic modulator with meandered phase shifters
Design, analysis, and characterization of a compact silicon photonic modulator with meandered phase shifters Open
We present a C-band Mach-Zehnder modulator with meandered phase shifters and a compact footprint of 432 × 260 on the silicon-on-insulator platform. Electrode, p-n junction, and optical transit time are considered when performing the…
View article: Silicon Photonic Single-Segment IQ Modulator for Net 1 Tbps/λ Transmission Using All-Electronic Equalization
Silicon Photonic Single-Segment IQ Modulator for Net 1 Tbps/λ Transmission Using All-Electronic Equalization Open
There is a continuous need to scale optical communication networks' capacity to cope with the exponential growth of data traffic. Silicon photonics (SiP) retains significant potential as a platform for optical transceivers due to its CMOS …
View article: Standalone, CMOS-based Faraday rotation in a silicon photonic waveguide
Standalone, CMOS-based Faraday rotation in a silicon photonic waveguide Open
Nonreciprocity is a fundamental requirement of signal isolation in optical communication systems. However, on chip isolator designs require either post-processing steps or external magnetic biasing, which are impractical for commercial app…
View article: 2D Constellation Distortion for Subduing Equalization Noise in Bandwidth- Limited IMDD Systems
2D Constellation Distortion for Subduing Equalization Noise in Bandwidth- Limited IMDD Systems Open
Bandwidth-limited IMDD systems suffer from the noise boosted by the strong equalization at the receiver. This letter proposes a multiplication-free approach that reduces the impacts of the equalizer-enhanced colored noise through time-inte…
View article: Asymmetric self-coherent detection
Asymmetric self-coherent detection Open
The bandwidth upgrade required in short-reach optical communications has prompted the need for detection schemes that combine field reconstruction with a cost-effective subsystem architecture. Here we propose an asymmetric self-coherent de…
View article: Net 220 Gbps/λ IM/DD Transmssion in O-Band and C-Band With Silicon Photonic Traveling-Wave MZM
Net 220 Gbps/λ IM/DD Transmssion in O-Band and C-Band With Silicon Photonic Traveling-Wave MZM Open
We present the design and characterization of O-band and C-band silicon photonic (SiP) traveling wave Mach-Zehnder modulators (TW-MZM) allowing 220 Gbps/λ net rate operation. The designed modulators show over 45 GHz 3-dB E-O bandwidth with…
View article: Systematic Performance Comparison of (Duobinary)-PAM-2,4 Signaling under Light and Strong Opto-Electronic Bandwidth Conditions
Systematic Performance Comparison of (Duobinary)-PAM-2,4 Signaling under Light and Strong Opto-Electronic Bandwidth Conditions Open
We present a systematic comparison of PAM-2 (NRZ), Duobinary-PAM-2, PAM-4, and Duobinary-PAM-4 (duo-quaternary) signaling in the context of short-reach photonic communications systems using a Mach–Zehnder modulator as transmitter. The effe…
View article: Demonstration of 108 Gb/s Duo-Binary PAM-8 Transmission and the Probabilistic Modeling of DB-PAM-M BER
Demonstration of 108 Gb/s Duo-Binary PAM-8 Transmission and the Probabilistic Modeling of DB-PAM-M BER Open
We report 108 Gb/s Duo-Binary PAM-8 (DB-PAM-8) transmission using direct-detection aided by Volterra equalizer. The bit-error-rate (BER) performance of the DB-PAM-8 signal has been evaluated through error counting by varying the bit rate, …
View article: Asymmetric direct detection of orthogonal offset carriers assisted polarization multiplexed single-sideband signals
Asymmetric direct detection of orthogonal offset carriers assisted polarization multiplexed single-sideband signals Open
We propose and demonstrate the asymmetric direct detection (ADD) of polarization division multiplexed single-sideband (PDM-SSB) signals with orthogonal offset carriers. ADD exploits the photocurrent difference to eliminate the Y-Pol interf…
View article: Partial Pre-Emphasis for Pluggable 400 G Short-Reach Coherent Systems
Partial Pre-Emphasis for Pluggable 400 G Short-Reach Coherent Systems Open
Pre-emphasis filters are used to pre-compensate for the transmitter frequency response of coherent systems to mitigate receiver noise enhancement. This is particularly essential for low-cost, low-power coherent transceivers due to having a…
View article: Demonstration of a 120° hybrid based simplified coherent receiver on SOI for high speed PON applications
Demonstration of a 120° hybrid based simplified coherent receiver on SOI for high speed PON applications Open
We demonstrate the first simplified coherent receiver using a 120° hybrid on silicon-on-insulator (SOI) for high speed PON applications. This coherent receiver integrates an inverse taper edge coupler for the received signal, a vertical gr…