Rahul Kumar Tiwari

Product Development Engineer

+601********, acumzw@r.postjobfree.com,

B-7, Sahib Parisar, Yadav Colony, Jabalpur, India

PROFILE SUMMARY

Experienced in Electronics hardware design & Testing, Product development, semiconductor components testing & assembly, Failure Analysis, Debugging & Troubleshooting, New product Introduction (NPI), Product Validation & Testing, Product Manufacturing.

Experienced with optical communication devices, LEDs, DFB & VCSEL Lasers, APD & PIN photodiodes, DWDM devices, Optical Amplifiers, Fiber Bragg Gratings, SONET/SDH, 10G Ethernet, XFP 10G LW/SW Optical Transceiver modules used in high datarate networking devices.

Hands on experience with various Electrical & Optical signal Instruments OTDR, Optical spectrum analyzer, Digital communication analyzer, Optical power meters, Oscilloscope, Spectrum analyzer, Logic analyzer, Signal & Pattern generators, Multimeters & LC meters.

Experienced with Board designing, circuit simulation, basic circuit block integration, Soldering, PCB designing & development, Product Testing.

Hands on experience in embedded hardware development, Experienced with 8 bit Atmel AVR microcontrollers, FW design in Embedded C. Arduino based embedded development.

Proficient in C & C++ programming for general use, embedded software development with Embedded C.

Experienced with Data Analysis. Hands on with data analysis tools like MS Excel, JMP 10, Basic SQL scripts. Created automated MS Excel VBA macros to carry out automated data query.

Familiar with Statistical Process control (SPC), Revision management, FMEA, Six Sigma, Agile manufacturing, Lean manufacturing methodologies, Quality management (ISO 9001:2008).

Used various interface protocols like I2C, SPI, CAN, USART.

Hands on experience with Digital Electronics Design, Verilog HDL, Xilinx ISE synthesis tool, FPGA, Logic Design & Simulation, Timing analysis, Functional verification.

Ensuring end to end product development from components level to Product assembly to product testing & Product shipment from the plant. Detect, define & design live solutions for product or process issue.

Responsible for Product demand fulfillment from customers, engineering changes for product yield improvement, Product manufacturing cost reduction, Product Quality & Reliability.

Ability to work standalone in various new domain by self-learning and analysis. Ability to analyse problem logically with given theory.

FORMAL EDUCATION

IIT Kharagpur, India

Masters in Technology, Department of Electronics, July’10- June’12

Specialization: Fiber optics & Optical communication system engineering CGPA: 8.13/10*

Rajiv Gandhi Technical University. Bhopal, India

Bachelor of Engineering (Hons) July’05- July’09

Electronics & Communication Engineering Degree: 79%

Senior Secondary (XII), SSM Jabalpur, India (Top Ranker in the batch) July’2005

Physics, Chemistry, Mathematics Percentage: 86%

Higher Secondary (X), SSM Seoni, India (Top Ranker of the region) July’2003

Academic subjects Percentage: 90%

PROFESSIONAL EXPERIENCE

Finisar Corporation June’12- Present

Product development Engineer for XFP Optical Transceiver Products/ 10G LW & SW.

Introduction of Linear Amplifier inside the XFP Transmitter optical subassembly (TOSA) to improve the signal integrity & Tx signal performance To improve this we have introduced a Liner amplifier inside the TOSA housing itself (Very close to the laser) so that it can reproduce the actual electrical signal & provide better impedance matching between the Laser driver & Laser itself.

Optimization of Tx CDR (clock & data recovery) Parameters to reduce the Tx eye Mask Failures. To provide better eye tuning we have developed a search algorithm to get most optimized value for CDR parameters (boost, Eq. up/down, asymmetry) to get optimized Tx eye.

Responsible for NPI (New product development) release of products, Working with R&D Team to

Evaluate various stages of product like EVT, PVT, MVT.

Involved in Process assembly & Testing for Semiconductor wafer of Laser diodes, Photodiodes.

Implemented a change of semiconductor die in XFP photodiode optical receiver subassembly, which improved the overall working performance of Module by providing better High power reception.

Perform circuit board verification & testing used to test transceiver modules, check for any abnormalities in the generated waveforms at various levels, Voltages/Current at different levels.

Introduction of new EMI Choke collar in the Module TOSA to provide EMI production.

Introduction of new thermal pads inside the module to improve Industrial temp performance & reduction in overall power consumption.

Implemented change in module Laser Diode assembly (Transceiver optical sub assembly) which reduced the overall Product cost by 10% & improved the output lightwave quality.

Done engineering changes in product testing to do Test Time Reduction by 30%, designing of various Debug process for product technicians, for circuit level debug, Component level debug.

Qualify EEPROM data for transceivers modules, which define the Alarm & Warning Threshold limits for various digital diagnostic parameters like, overcurrent protection limit, High power protection, Rx Loss Assert & dessert power levels etc.

Implemented Optical Transceivers testing cost reduction by using Instrument sharing in testers (Digital Communication Analyzer (DCA) tester), which provides the DCA Cost reduction by 50%. Done required Changes in the test plan to accommodate this instrument sharing.

Designed & Implemented Temperature monitoring system with real time data logging in the server. This

system monitors the changes & drift in the temperature due to Hot air from the temp boxes. System use

Temp sensor provided to Atmel AVR microcontroller and Ethernet shield for server logging.

•Responsible for Designing 1st Pass Yield improvement plans on weekly basis, & Present the Product yield Improvement repot on weekly basis.

Preparation of Bill of material (BOM) & respective cost modeling for the changes done.

Qualification for new requirement from the customer by running Special Build Requests (SBRs).

Support Product returns RMAs (Return to manufacturer) due to any fault at customer end.

IIT Kharagpur & MHRD, Govt. of India. June’11-April’12

Research Scholar

Research Details: Physical & MAC Layer issues in Long Reach Passive Optical Networks (LR-PON). LR-PON is a PON based technology to support High Bandwidth Services by Integration of Metro & Access Layers, which removes the requirements of intermediate networking equipment to provide cost reduction.

BER analysis and Sensitivity penalty for burst-mode optical receiver has been done, considering thermal noise dominated case & Shot noise dominated case with varying number of preamble bits. Simulated the results in MATLAB.

Analysed Real time data analysis of DBA algorithm, Interleaved polling with adaptive cycle time (IPACT) under various grant scheduling schemes like Gated, Limited, Linear credit. Simulated these algorithms using MATLAB.

Proposed modification in IPACT algorithm and delay comparison with existing IPACT algorithm under above grant scheduling schemes and provide the data analysis comparison with IPACT.

Tata Consultancy Services, Gandhinagar, Gujarat, India March’10- June’10 Assistant System Engineer Trainee

Worked with software development team to support design & development in ongoing projects based on C.

Worked in core java, developed desktop GUI Apps in java windows builder.

Worked with Java Front end UI development team to outline basic modules & sub modules.

Prasar Bharti, Broadcasting Station, Jabalpur June’07- Aug’07

Intern in Functional unit in Jabalpur

Learnt about various functional units, tracking of dishes with satellite, Basic features of 10KW high power transmitter, Electronic control console etc.

Build a Low power FM communication system which can adapt most functional units of the station.

TECHNICAL PROFICIENCIES

Academic Courses: Electronic devices & circuits, Digital Electronics & circuits, Advanced Optical communication,

Fiber optics devices and circuits, Optical Instrumentation, Computer Networks, Circuit theory, Digital system design, Data Structures, Digital VLSI Design. Electronic Instrumentation, Microprocessors, Telecommunication Systems.

Tools: Cadsoft Eagle PCB design tools, Altium Designer, Orcad/Pspice, Proteus 8, Xilinx ISE, IAR Embedded Workbench, Atmel Studio 6, MATLAB, Arduino ISE, Multisim; JMP 10, Dev C++, Microsoft Office, Eclipse IDE, Android studio IDE, LabView.

Skills: PCB Designing, Soldering, In Circuit debugging & JTAG debugging, Electronic Lab instruments usage,

Electronic circuit design & simulation, Algorithm modelling in MATLAB, Embedded Hardware design,

Programming Languages: Verilog HDL, C, Embedded C, C++, Java SE, Python, Matlab C.

Other Interests: Engineering drawing for Product design, Wordpress web development, Arduino based circuits &

Android app development using Android studio IDE.

OTHER PROJECTS

Digital CRF Meter:

Developed a lab project in breadboard to measure given capacitance, Resistance & Frequency with FND displays.

Density based Traffic control system:

Developed a smart traffic light Control system using AVR MCU developed with Embedded C. System uses

LDR sensor to take optimized decision in traffic light controlling, System also provides Traffic density based data

to the central control system for analysis purpose.

Academic Project: Bachelor of Engineering in Electronics & Communication Sept’08 - June’09

Intelligent Safe Commuting System for Vehicle Drivers

Designed a closed loop security system for Road vehicle drivers, which detects Driver’s brain state by using a brain wave sensors, measures the frequency, Process the data & Take required action.

System able to provide the Drivers brain data to Security network of traffic police, by which they can may each registered driver on individual basis.

INDUSTRIAL TRAININGS

DST/FIST Lab IIT Kharagpur Dec’11- Jan’12

Learnt about various type of routing mechanism, L2 switches, Data & voice transfer over ATM & SONET.

Assembled a SONET & ATM setup bed to transfer a file from one PC to another & done the comparative analysis.

Tech Center, Jabalpur April’06- July ’06

Basic electronic devices study & basic electronic circuit implementation, Doing Circuit Simulation & Designing the Printed Circuit board layout of the circuit.

Build Sensor & microcontroller based Applications: Line following Robots; Obstacle detector.

AWARDS & ACHIVEMENTS

Academic

Best Performer Award by Rotary Jabalpur West for achieving first rank in the school in XII.

Appreciated by TSE Lab IIT Kharagpur for technical guiding & team work.

Secured first rank in the school in higher secondary examination 2003.

Secured 99 percentile marks in Graduate aptitude test in Engineering 2010.

Activities

Director & Script writer of the Drama "Aag ka Tamasha" played in Annual Fresher's event GENISIS.

Designer and Coordinator of Circuit design event "E-rachna" in Annual technical Festival E-Rachna.

Co-Founder & Active member of College Robotics Club Yantra Veda

Participated in Ipoh International Run 2013.

Got State Rank 2 in engineering project display Event Techniko Festus 2007.

Hobbies

Planning vacation Trips & Travelling different natural places.

Drawing, Engineering Drawing for products, Music,

Playing Cricket, Badminton, Chess, Carom etc.

https://my.linkedin.com/in/rahul21iitkgp

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