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My Research
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RESEARCH INTEREST Broadband
Access, WDM/DWDM Passive Optical Network (PON), Optical Coherent
Transmission, High Throughput Optical-Wireless Integration, Radio-over-Fiber
Technology, PHY and MAC-layer protocols, Efficiency enhancement in Solar Cell
Systems etc. KEY RESEARCH WORK Ultra-high data rate of 100 Gbps transmission for long-haul and metro access Evaluate 100 Gbps generation and modulation techniques, linear and
non-linear impairment impacts, transmission performance over commercially
available network elements such as ROADMs, WSS modules Next-generation
Optical-Wireless inter-connection for high-performance computing (HPC) and
Server System Developed spectral efficient
25GHz spaced bi-directional 10-Gbps DWDM-PON using DPSK and Duobinary modulation and wavelength reusing techniques Demonstrated scheme to
eliminate Rayleigh backscattering noise in the long-reach (over 20km)
bi-directional single fiber WDM-PON system Developed a multi-failure
protection/restoration scheme for high throughput bi-directional 10Gbps
colorless WDM-PON system that can centrally protect simultaneous multiple
failure of feeder fiber, distribution fiber, remote node and optical
transmitter at the central office. Developed instantaneous clock
recovery scheme for the upstream burst mode signal in next-generation 10Gbps
TDM PON using centralized clock distribution Developed enabling technologies
such as optical label generation and encoding method, label swapping scheme,
optical buffering etc. for optical label switching (OLS) networks. Developed novel schemes of
optical label generation and label swapping for same wavelength data
switching without using any wavelength converter. Demonstrated wavelength
selective reconfigurable optical fiber delay buffer for DWDM optical packet
switched (OPS) networks. Developed distributed fiber
optic sensing system for intruder detection exploiting polarization in
optical time domain reflectometer (OTDR) with
improved sensitivity using Raman amplification and Complementary correlated Goley codes. Investigated system
requirements, purchased necessary lab equipments,
implemented proof-of concept experimental testbed
setup. Developed signal processing
software tools for detection and localization of intruder events in this
distributed sensing system Developed spectrally efficient
40 Gbps system over 50 GHz DWDM transmission system
Developed simulation for 40 Gbps DPSK systems using VPI TransmissionMaker
for cross-verification of the simulation and experimental results. Developed Label Switch Control
Protocol (LSCP) server/agent software using C++ in Sun Solaris and Windows NT
to manage network element in OLS testbed. The LSCP
is used by the network control and management (NC&M) using TCP/IP to
provide element management functionality of the OLS nodes. Developed network interface
driver in Visual C++ to control/configure OLS network element Developed OSPF/BGP4/RSVP/LDP
extension and enhancements using C/C++ in UNIX to support routing and traffic
engineering capabilities in OLS network. Designed and developed
graphical user interface (GUI) craft program (Clapper) using MFC Visual C++
for OLS network testbed. The behavior of the
clapper is like NC&M upper layer application software and can be used to
test the functionality of the lower layer interfaces. Designed and developed switch
control software using C++ to configure Lithium Niobate
optical switch fabric used in the same OLS testbed
project. Developed simulation programs
using OpNet Modeler simulation tool and C++ for
studying network performance measures of the NGI testbed. Developed SNMP MIB extension
using AdventNet SNMP utility tool for OLS Designed NGI OLS testbed architecture and switch-node architecture. Developed prototype Home
Networking System using Java and C++ in a Design Multicast Switching
Architecture of the Variable Network-Grain Optical Global Highway (VaNGOGH) testbed proposal to
DARPA. Wrote DARPA quarterly report on
research and design activities. PUBLICATIONS: Please visit Publications
to see all my publications PATENTS Co-inventor of the
following patents granted by USPTO
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