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.

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