NARENDRA MAHRA

Associate Engineer (Design and Devlopment)

OPTIWAVE PHOTONICS LIMETED

Hyderabad, A.P., India

Email: j4954b@r.postjobfree.com, j4954b@r.postjobfree.com

Contact No: +91-901********

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Career Objective

To secure a position that would enable me to, broaden my current skills, challenge my various abilities and add valuable assets to your esteemed organization as an active member.

Present Status (From July 2010)

Currently working as Associate Engineer in design and development section in Optiwave Photonics Ltd, IDA Mallapur, Hyderabad.

My Role in Projects:

Detailed analysis for optical component and mechanical assemblies required for project. Testing of Optical components, Optical components placement, optical fiber routing, optical device testing and final calibration of device.

Project-1:

Title: Customized photodiode for defence application.

Description:

The project aim is to design and developed the photodiode for defence application. For this after designing and development lot of functional and environmental tests are carried out on photo-diode.

The Photo-diode having large dynamic response range over which output voltage is almost constant. For achieving this, Plano-convex lens is placed on the top of the photo-diode and fixed using appropriate grade epoxy. The output voltage responsitivity is dependent on the load resistor value.

The work is include following things

1) Testing of general purpose photo-diode

2) Precisely fixing of appropriate lens

3) Determine the effect of load resistor on dynamic range of photo-diode

4) Functional testing of photo-diode

5) Fixing of photo-diode

6) Environmental testing

Project-2:

Title: Noise Figure Measurement in Erbium Doped Fiber Amplifier (EDFA).

Description:

The project aim is to measure the Noise Figure performance of the EDFA. For this signal spectrum is measured before amplification and after amplification..

Noise Figure is calculated for different input signal level and different pump power level.

Project-3:

Title: Cladding etching of Single Mode and Multi Mode Fibers.

Description:

The project aim is to precisely etch the cladding of the Single Mode and Multi Mode Fibers. For this output power of etching fiber is measured before etching and after etching. Based on the decrease in output power we can analyses the cladding etching.

Other Works

I am involving in optical routing of EDFA, testing of EDFA, Laser pigtailing for stabilized light source, calibration of stabilized light source, photo-diode pigtailing etc.

Educational Background:

2008 – 2010 Master of Technology (Laser & Electro-Optics)

Institute/University : Defence Institute of Advanced Technology, Pune, India

CPI : 7.96 (10 point Scale)

Area of interest : Photonics, Optical Fiber Sensors, High Power Lasers

Relative Courses done : Laser & Applications

Fiber Optics & Applications

Applied Optics

Optical Communications

2005 – 2008 Bachelor of Engineering (Electronics & Communication)

Institute/ University : Birla Institute of Applied Sciences, Bhimtal, Nainital

Marks Obtained : 70.96%

2001 – 2004 Diploma (Information Technology)

Institute/ University : Gov. Polytechnic, Nainital

Marks Obtained : 73.82%

Research Experience: M.Tech Project Details

Title: “Damage Detection in Composite Structures using Hi-Bi PCF Sensor”

Supervisors: Dr (Mrs.) H.V. Thakur, Sc’D’

Description: The purpose of this project is to detect the damage in glass composite beam using High Birefringent (Hi-Bi) Photonic Crystal Fiber (PCF) sensor. The Hi-Bi PCF sensor is embedded on the glass composite beam. The damage is detected based on change in the fundamental natural frequency of the glass composite beam. Natural frequency is measured through polarimetric-interferometric technique.

The Hi-Bi PCF the sensor is sensitive to the measurand over the embedded sensor length (compared to the operation of a point sensor) and the sensor can be embedded in the composite structure with minimum negative effect on the integrity of the structure itself. Hence, a single fiber optic sensor can be seen to be a very promising device for global structural health monitoring. Hi-Bi PCF sensors has shown that the fibers used have exhibited extremely small sensitivity values to temperature, while maintaining good sensitivity to strain/pressure, key parameters in structural measurements. This advantageous situation arises from the PCF being made from a single material, i.e. pure silica, and, with air holes running along the length of the cladding of the fiber, total internal reflection at this interface can occur. Moreover, the two large air holes adjacent to the solid core results in the required geometric birefringence to give these favorable characteristics.

The first natural frequency, as measured by the embedded Hi-Bi PCF sensor, matches very closely to the frequency measured by use of the conventional accelerometer (B&K). The Hi-Bi PCF optical sensor could thus be further explored under harsh environmental conditions with variations in temperature, due to their inherent advantage of temperature insensitivity.

Experimental Skills

Optical Spectrum Analyzer, Optical Test System

Splicing Machine (Fusion Type)

Optical Time Domain Reflectometer (OTDR)

Optical Power Meter, Laser Driver

Dye Pumped ND:YAG LASER , He-Ne LASER

Semiconductor LASER (FP and DFB), UV Lamp for epoxy curing

Pyroelectric Detector and Thermopile Detector

Accelerometer, Impact Hammer Dynamic Signal Analyzer.

IT Exposure

• Programming Language : C

• Simulation Software : MATLAB (Basic)

• Operating Systems : Windows

• Software Toole : MS office

Publication

“Delamination detection in glass composites using embedded Hi-Bi photonic crystal fiber” Sandipan Nalawade, Narendra Mahra, H V Thakur and K T V Grattan, 2011 Smart Mater. Struct. Volume 20, Number 5, May 2011, pp. 550**-*****(7)..

Conference

Sandipan Nalawade, Narendra Mahra, H V Thakur and K T V Grattan, 2010, Damage detection of composites using embedded Hi-Bi PCF, Photonics 2010, IIT Guwahati, December 12-15.

Seminars Present

• Damage Detection in Composite Structures using Hi-Bi PCF Sensor (M.Tech. III & IV Semester)

• Soliton in Optical Communication ((M.Tech. II Semester)

• Excimer Laser ((M.Tech. II Semester)

• Fiber Optics Connectors (M.Tech. I Semester)

• Mobile communication (B.E. Final Semester)

Extracurricular Activities

• Secretary of Mess Committee in College during B.E.

• NSS Certificate Holder.

• Akhil Bhartiya Sanskrit Gyan Pariksha Certificate Holder.

Personal Particulars

Name Narendra Mahra

Date of birth 14th June 1984.

Nationality Indian

Permanent Address Balrampur House,

Mallital, Nainital, Uttarakhand.,

Mob No. +91-901*******

Languages known English and Hindi

Passport Available

References

Dr. (Mrs.) Harneet V. Thakur

Scientist ‘D’

Department of Applied Physics

Defence Institute of Advanced Technology

E-mail Address: j4954b@r.postjobfree.com

Mr. B.B. Padhy

Scientist ‘E’

Department of Applied Physics

Defence Institute of Advanced Technology

E-mail Address: j4954b@r.postjobfree.com

Declaration

I hereby declare that all the information given above is true to the best of my knowledge.

Place: Hyderabad Narendra Mahra

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