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Kaisar R. Khan Ph. D (EE) Candidate University of Central Florida.
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Kaisar R. Khan Kaisar R. Khan
Ph. D (EE) CandidatePh. D (EE) Candidate
University of Central University of Central FloridaFlorida
BelieveBelieve• Professionalism• Innovation• Integrity• Honesty• Patience
EDUCATION EDUCATION • Ph. D, (Expected date of Graduation Fall
2007) University of Central Florida
• MSEE, The University of Texas at El Paso
• M. Eng, Bangladesh University of Engineering and Technology, Dhaka.
• B. Sc. Eng., Bangladesh Institute of Technology, Rajshahi
Research Area: Research Area: High speed electronics and High speed electronics and
optical communicationoptical communication
Major Advisor:Major Advisor:
Dr. Thomas WuDr. Thomas Wu
Dept. of ECE, UCFDept. of ECE, UCF
THESISTHESIS• Effect of ASE noise on reference and M-QAM signals in a
fiber-optic link with EDFA, MS thesis at UT El Paso Advisor: Mehdi Shadaram, Professor and Head, Dept. of ECE, UTEP
• Expected energy generation of two area interconnected system with jointly owned units, M. Eng. thesis at BUETAdvisor: Quamrul Ahsan, Professor and Dean, Faculty of ECE, BUET
• Digital design of a dc motor speed controller, senior project conducted at BIT, Rajsahi
TEACHING EXPERIENCE TEACHING EXPERIENCE • Teach under graduate courses and Labs in
the area of telecommunication, microprocessor, electronic, and networking as GTA/Adjunct Lecturer/Lecturer for more than 6 years.
LABLAB1. Electronics 2 (EEL4309) at UCF2. Analog Filter Design (EEL 4140 ) at UCF3. Analog Devices Lab (EEL 1070C )at Florida
Technical College4. Measurement Laboratory (EE 221 ), at CCNY5. Tool Skills Laboratory (EM 130) at NY City Tech6. Electronics Laboratory at UTEP7. Microprocessors at UTEP8. Telecomm Laboratory at BUET
LectureLecture1. EEL4205 (Electric Machinery) at UCF2. EEL 1070C: Analog Devices and
Operation at Florida Technical College3. MAT1001:Remedial Math course at
BMCC 4. Electromagnetic at BIT , Rajshahi5. Electrical Machines at BIT, Rajshahi
PROJECT PROPOSALPROJECT PROPOSAL1. 189K Digital telephone installation project in
Bangladesh, Submitted to the government of Bangladesh.
2. Dynamic Magneto Transport Effect on Semiconductor Material, Kaisar Khan and Thomas Wu, submitted to SATOP.
3. Remote RF Measurements for Pipeline Monitoring, (FloWatch Phase II), Jie Chen, Kaisar Khan and Thomas Wu, submitted to Emtel, Melbourne, Florida.
4. RF sensor design for remote gas pipeline monitoring system, Kaisar Khan, Yupeng Chen and Thomas Wu, submitted to Emtel, Melbourne, Florida.
JOURNAL PUBLICATIONS JOURNAL PUBLICATIONS 1. Kaisar R. Khan, H. Kabir, T.X. Wu, S. M Shamim Hasan
and Mehdi Shadaram. “Performance evaluation of Multi-wavelength M-QAM signal transmitted through fiber optic link with EDFA” Journal of Optical Fiber Technology, Elseiver Publication, July 2004, pp 266-274.
2. Md. Kaisar R Khan, FM Atiq, H. Kabir and S. M Shamim Hasan, “Performance evaluation of 64-MQAM signal transmitted through fiber optic link with fiber amplifier”, November 2003, IEB Journal of Electrical Engineering, Dhaka, Bangladesh.
3. Md. Kaisar R Khan, Q. Ahsan and M. R Bhuiyan, “Expected Energy Production Cost of Two Area interconnected Systems with Jointly Owned Units” Electric Power System Research journal (Elseiver), April 2004.
CONFERENCE PROCEEDINGSCONFERENCE PROCEEDINGS 1. Jie Chen, Kaisar Khan, Thomas X. Wu, M. Auerbach, Larry Mertens, Don Wilson,
and Jim Houyouse, “RF Loss Measurement of Pipeline Security Monitoring System” Presented in IEEE APS/URSI annual meeting, July 2005, Washington D.C
2. K. Khan, T. Wu, Y. Lu and S.T. Wu, “Liquid Crystal all optical switches”, Presented in IEEE APS/URSI annual meeting, June 2004, Monterey, CA
3. Md. Kaisar R Khan, Q. Ahsan and M. R Bhuiyan, “Expected Energy Generation of Two Geographically Isolated Area System with Jointly Owned Units”, Presented third International Conference on Renewable Energy for Sustainable Development, October 2003,Dhaka, Bangladesh
4. K. Khan, M. Rahman , Xiang li and M. Potasek “Effects of Pulse Separation and Bit-Rate in Multi-Terabit/sec All-optical Waveguide Switches” Presented at OSA conference on laser and optics, October 5 -9, Tucson, Arizona.
5. Md. Kaisar R Khan and Mehdi Shadaram “Performance Evaluation of M-QAM Fiber Optic Link with EDFA” Proceeding of Communication Systems, Networks and Digital Signal Processing Symposium, July 15-17, 2002, Stafford shire university UK, pp. 140-143.
6. Md. Kaisar R Khan and Mehdi Shadaram, "Effect of amplified spontaneous emission noise on the phase of reference signals transmitted through fiber amplifiers," ICAPT 2002, Quebec City, Canada, June 2002.
PROFESSIONAL TRAININGPROFESSIONAL TRAINING1. GTA Certification course, Faculty resources
center, UCF, Spring, 20052. Laboratory safety orientation course, UT El
Paso, 20003. Management training for the government
officers in Bangladesh, Aug. –Dec. 1998 4. Two month on job attachment to a satellite
earth station at Dhaka, Bangladesh, May 99 to July 99
5. Training on SPC digital switching system in Bangladesh, February 1999
6. Industrial attachment on video system to Philips Bangladesh Ltd., Dec 93 to Jan 94
GRADUATE COURSESGRADUATE COURSESMore than twenty-four graduate coursestaken in the areas of :1. RF and Optical fiber communication 2. Laser and Optoelectronic3. Semiconductor devices and VLSI
design4. Telecommunication and Networking5. Wireless communication etc
Research Research ActivitiesActivities
RF loss measurement RF loss measurement of pipelineof pipeline
Kaisar Khan, Jie Chen, Satish Valenkar Kaisar Khan, Jie Chen, Satish Valenkar and Dr. Thomas Wuand Dr. Thomas Wu
RF loss measurementRF loss measurement
RF Loss Measurement of Gas RF Loss Measurement of Gas Pipe (I) Pipe (I)
Baseline Test Set Model
Receiver Section (B)Section of Pipe (P)Transmitter Section (A)
g/4
Coax to WG transformer
Impedance transformer
Matched Load
Short Circuit
RF Loss Measurement of Gas RF Loss Measurement of Gas Pipe (II)Pipe (II)
AA
AA
ASS
SSS
2221
1211
BB
BB
BSS
SSS
2221
1211
TT
TT
TSS
SSS
2221
1211
Transmitter Section:
Receiver Section:
Total S-parameter:
where;BA
AABAT
SS
SSSSS
1122
1221111111 1
BA
ABT
SS
SSS
1122
121212
1
BA
BAT
SS
SSS
1122
212121
1
BA
BABBT
SS
SSSSS
1122
1222212222
1
Receiver Section (B)Transmitter Section (A)
30mm
30mm
30mm
b3b2b1 a3a2a1
31.4mm
31mm
31.6mm
a1 = 2.5 mmb1 = 5.75 mm
a2 = 5 mmb2 = 11.5 mm
a3 = 7.5 mmb3 = 17.3 mm
a4 = 11.4 mmb4 = 26.25 mm
b4a4
40mm
33mm
3mm
Coax – Waveguide Adapter DesignCoax – Waveguide Adapter Design Operating frequency: 1.3 GHz
Medium inside the waveguide: Air
Dielectric in coaxial line: Air
Probe depth of penetration to launch RF waves
P
Short Circuit 2g
L
Theoretical simulation results:
Probe Length L (m)
Ref
lect
ion
(d
B)
Ref
lect
ion
(d
B)
Distance P (m)
Frequency Dependant Frequency Dependant AttenuationAttenuation
1.2 GHz Transceiver 1.2 GHz Transceiver DesignDesign
Kaisar Khan, Yupeng Chen and Dr. L. Kaisar Khan, Yupeng Chen and Dr. L. MartenMarten
UCF and Emtel Inc.UCF and Emtel Inc.
System Overview : Flow System Overview : Flow Watch Monitoring SystemWatch Monitoring System
Breach
PipelineRF signal
Sensor System
Signal/Noise ratio (SNR) as a function of distance Signal/Noise ratio (SNR) as a function of distance for (a) demonstration system and (b) operational for (a) demonstration system and (b) operational
systemsystem
(a) (b)(a) (b)
Transceiver Block DiagramTransceiver Block Diagram
RF Amp PA
LNA
IF Amp
Output
Timer (FPGA) Impedance
matching (50 ohm)
BPF
IF: BPF(10MHz)
Peak Detector
LPF ADC DSPFIFO
Limiter
DAC
STC
synthesizer
Magneto Static Magneto Static Analysis of PMSM Analysis of PMSM
using FEMusing FEM
Kaisar Khan, Dr. Tom Wu and Jay Kaisar Khan, Dr. Tom Wu and Jay VaidyaVaidya
UCF and Electrodynamics Inc., FLUCF and Electrodynamics Inc., FL
Geometric ModelGeometric Model
Flux line distribution of the proposed Flux line distribution of the proposed motor at (a)150A (b) 650Amotor at (a)150A (b) 650A
(a) (b)
Flux density profile of the Flux density profile of the proposed motor at (a)150A (b) proposed motor at (a)150A (b)
650A 650A
(a) (b)
Torque ProfileTorque Profile
0
20
40
60
80
100
120
140
160
180
200
50 100 150 200 250 300 350 400 450 500 550 600 650
Ia,rms (Amp)
To
rqu
e (N
-m)
Phase Noise in Phase Noise in OF LinkOF Link
Kaisar Khan and Dr. Mehdi ShadaramKaisar Khan and Dr. Mehdi Shadaram
UT El Paso, TXUT El Paso, TX
System Block DiagramSystem Block Diagram
1550 nm
Msg.
1:1Coupler
ExternalModulator
Msg. Signal
1:1Coupler
Photo diodeDe-modulator
Laser diode
IsolatorOpt. Pump
1:1Coupler
Optical Amplifier in the linkOptical Amplifier in the link
Power Amplifier
Inline Amplifiers
Receiver Amplifiers
Tx Rx
Tx Rx
Tx Rx
EDFA’s Gain Saturation EDFA’s Gain Saturation CharacteristicsCharacteristics
EDFA’s Wavelength Dependant EDFA’s Wavelength Dependant Gain CharacteristicsGain Characteristics
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
15
00
15
03
15
06
15
09
15
12
15
15
15
18
15
20
15
23
15
26
15
29
15
32
15
35
15
38
15
41
15
44
15
47
15
49
15
52
15
55
15
58
15
61
15
64
15
67
15
70
15
73
15
76
15
78
15
81
15
84
15
87
15
90
15
93
15
96
15
99
Wavelength, nm
Inte
nsi
ty, d
Bm
Phase NoisePhase Noise
QAM Transmission QAM Transmission Through OF LinkThrough OF Link
Kaisar Khan and Dr. Mehdi Kaisar Khan and Dr. Mehdi ShadaramShadaram
UT El Paso, TXUT El Paso, TX
System Block DiagramSystem Block Diagram
1550 nm
Msg.
1:1 Coupler
External Modulator
M-QAM Signal
1:1 Coupler Photo diode
M-QAM Receiver
Laser diode
Isolator Opt. Pump
1:1 Coupler
Optical Amplifier in the linkOptical Amplifier in the link
Power Amplifier
Inline Amplifiers
Receiver Amplifiers
Tx Rx
Tx Rx
Tx Rx
EDFA’s CharacteristicsEDFA’s Characteristics
EDFA’s Wavelength Dependant EDFA’s Wavelength Dependant Gain CharacteristicsGain Characteristics
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
15
00
15
03
15
06
15
09
15
12
15
15
15
18
15
20
15
23
15
26
15
29
15
32
15
35
15
38
15
41
15
44
15
47
15
49
15
52
15
55
15
58
15
61
15
64
15
67
15
70
15
73
15
76
15
78
15
81
15
84
15
87
15
90
15
93
15
96
15
99
Wavelength, nm
Inte
nsi
ty, d
Bm
Effect of Link LossEffect of Link Loss
-15
-12
-9
-6
-3
0
-35 -30 -25 -20 -15 -10 -5 0 5 10
Po, dBm
log
(BE
R)
L = 10 dB 20 dB 30 dB 40 dB Upper Bound
-15
-13.5
-12
-10.5
-9
-7.5
-6
-4.5
-3
-1.5
0
-35 -30 -25 -20 -15 -10 -5 0 5 10 15
Po, dBm
log
(BE
R)
L = 0 dB 20 dB 40 dB 60 dB Upper Bound
Effect of Amplifier PositionEffect of Amplifier Position
-15
-13.5
-12
-10.5
-9
-7.5
-6
-4.5
-3
-1.5
0
-35 -30 -25 -20 -15 -10 -5 0 5 10
Po, dBm
log
(BE
R)
Power In-line Rx Upper Bound
-15
-13.5
-12
-10.5
-9
-7.5
-6
-4.5
-3
-1.5
0
-25 -20 -15 -10 -5 0 5 10
Po, dBm
log
(BE
R)
Power In-line Rx Upper Bound
20 dB 40 dB
WDM Application of 16-QAM SignalWDM Application of 16-QAM Signal
Significant ResultsSignificant Results1. ASE noise is the most dominating noise at low and medium
link losses, but at very high link losses the thermal noise becomes as a dominating noise.
2. Higher wavelengths show less degree of saturation and ultimately better BER performance of M-QAM signal.
3. The receiver amplifier performs better than the other two amplifier positions (power and in-line amplifier) the link at high link losses, because the amplifier placed at the receiver end experience less degree of saturation due to link losses.
PriorityPriority• GOD• Health• Family• Work and Education• Social Activity• Entertainment