VALLIAMMAI ENGINEERING COLLEGE,EIE dept2016-2017(ODD) EI6703 FIBRE OPTICS AND LASER INSTRUMENTS QUESTION BANK Unit -1 OPTICAL FIBRES AND THEIR PROPERTIES PART –A 1. Analyse how numerical aperture is related to total internal reflection in optical BLT-4 fibers? 2. Compare permanent and semi permanent Splicer. BLT-5 3. Discuss Snell’s law of refraction. BLT-2 4. Examine the principle involved in an optical detector. BLT-3 5. Distinguish between intrinsic and extrinsic absorption. BLT-2 6. Define intermodal dispersion .What is its cause? BLT-1 7. List the different types of glass fibers. Mention a potential application of each. BLT-1 8. Discriminate Intermodal and Intramodal dispersions. BLT-5 9. Generalize the necessity of cladding for an optical fibre. BLT-6 10. Generalize any two required properties of light sources used in optical fibre BLT-6 communication. 11. Examine the features of Single mode Graded Index Fiber . BLT-3 12. Outline optical attenuation. BLT-1 13. Describe the Snell’s law and write the equation for critical angle. BLT-2 14. Define Rayleigh Scattering . BLT-1 15. Analyze the role of optical detector in fibre optics system? BLT-4 16. Give the advantages of optical fiber . BLT-2 17. Define acceptance angle. BLT-1 18. Point out principle used in the working of fibers as light guides. BLT-4 19. Decide among the different fibers which has the least dispersion? BLT-3 20. List any two semi permanent splicers. Why are they called so? BLT-1 PART-B 1. Elaborate about the various attenuation losses possible in optical fibers. Also BLT-3 discuss how intramodal and intermodal dispersion can be minimized. (16) 2. What are the general requirements considered while selecting a light source BLT-1 for fibre optic link? Explain about the construction and working of photomultiplier Tubes used as optical source in fibre communication. (4+12) 3. Compose how light propagates through step index and graded index fibre. (16) BLT-6 Prepared by Mr. R. Issan Raj A.P (O.G)-EIE Ms. K. Rathna Priya A.P (O.G)-EIE (8) 9.G)-EIE Ms. Explain any one BLT-2 Splicer with a neat diagram. (16) BLT-4 12. VALLIAMMAI ENGINEERING COLLEGE. Analyze the importance of Ray optic theory and explain in detail. (16) BLT-2 5.(8) (ii) Write short notes on fibre terminators. (i) Derive an expression for number of modes propagating in a graded index BLT-5 fibre from the first principle (8) (ii) The relative index difference between the core axis and the cladding of a BLT 5 graded index fibre is 0. (8) BLT-1 8. (8) Prepared by Mr. (8) BLT-2 (ii) Differentiate an optical connector from a Splicer. K.EIE dept 2016-2017(ODD) 4.G)-EIE . (i) Draw the block diagram of optical fibre Transmission system and explain BLT-1 its functions.(8+8) BLT-2 14. 7. Rathna Priya A. Issan Raj A. R. (i) Compare and contrast the different parameters of glass fibers with plastic BLT-4 fibers (8) (ii) Explain the requirement for an ideal optical source and an ideal optical BLT-4 detector. (i) Describe the different types of optical fibre joints. (i) Compare and contrast all the parameters of single mode and multimode BLT-4 glass fibers. (8) 10.7% when the refractive index at the core axis is 1.P (O.45. Describe with the aid of suitable diagram: (5+5+6) BLT-1 (i) the multimode fiber mechanical splice (ii) a single mode fiber mechanical splice (iii) the multimode fiber splicing using a silicon chip arrays. mie and nonlinear scattering? Explain in detail with BLT-4 examples.(8) BLT-1 (ii) Give an account of Optical detector response time and its influence on BLT-1 detector parameters. Discuss the characteristics of optical sources and detectors. Discuss the different absorption losses in an optical fibre. (i) Explain the loss due to Rayleigh Scattering in optical fibers. (8) 11.(8) (ii) What are linear.Estimate alues for the numerical aperture of the fibre along the axis when the index profile is assumed to be triangular(8) 6. (8) 13. (i) Illustrate the different types of connectors with an example and explain BLT-3 their Properties (8) (ii) Sketch and explain BLT-3 (1) ISI in optical fiber (2) Lambertion Source.P (O. (5) (iii) Moire fringe modulator of displacement measurement(6) Prepared by Mr. How optical beam polarization achieved in external modulators? BLT-5 17. K. Rathna Priya A. With the help of OTDR display diagram. Summarize about the significance of polarization maintaining fibers in optical BLT-2 communication. Issan Raj A. BLT-1 5. BLT-2 12. BLT-2 2. BLT-4 10. BLT-3 4. BLT-3 8. (16) 3. Point out the main cause of degradation of the optical signal at the input of BLT-4 the modulator.(16) 2. BLT-1 19. Classify the different types of fiber optic sensors. Define Moire fringes. 18. BLT-1 PART-B 1. Write short notes on the operation of the following BLT-1 (i) Optical fluid level detector. How the direct modulation broaden the spectral line width of the laser diode? BLT-5 15. List the applications of fiber optic sensors. List the important parameters of optical detectors. List the features of magneto optic modulators. Classify the different types of modulators. Examine the need of electro optic modulator. Examine and explain the principle and working of any two types of fibre BLT-3 optic sensors. Pressure and BLT-5 Level sensors.G)-EIE . BLT-1 7. (16) BLT-2 5.G)-EIE Ms. BLT-1 13. Describe Pockels effect.P (O. Position. (16) 4. Generalize the need for modulation. BLT-1 9. VALLIAMMAI ENGINEERING COLLEGE. Examine acoustic optic modulator. Give the theory of fibre optic modulators and discuss its advantages. BLT-2 20. Explain how optical fibers are used as Displacement. 3.(5) (ii) Optical reflective type displacement sensor. BLT-3 11. Generalize the principle of Proximity sensor. List the parameters of a typical fiber optic sensor. Differentiate intrinsic and extrinsic fiber optic sensor. BLT-4 6. BLT-6 16. explain how measurement of BLT-1 attenuation and fiber length is done using Optical time Domain Reflectometry.P (O. Obtain any two industrial applications of an optical fibre.EIE dept 2016-2017(ODD) Unit -2 INDUSTRIAL APPLICATION OF OPTICAL FIBRES PART –A 1. BLT-6 14. R. Describe about fibre optic instrumentation system. Discuss about fibre optic temperature sensor. BLT-3 7. VALLIAMMAI ENGINEERING COLLEGE. Issan Raj A.(8) (ii) Explain the principle of acousto optic effect. Define the term mode locking. (8) (ii) Obtain the method of measurement of temperature using optic fibre BLT-3 optic sensors. BLT-1 3. (16) 12.P (O. List any four properties of laser. (i) Describe the construction and principle of working of laser Doppler BLT-2 velocity sensor. R. Analyze how population inversion is achieved for Laser Generation? BLT-4 2. List the characteristics of laser. BLT-4 6. (i) Examine the principle of interferometric method of measurement of BLT-3 length. Examine why optical pumping is preferred in lasers? BLT-3 9. (i) Explain a Michelson interferometer used for high resolution BLT-4 displacement measurement.(8) 7.G)-EIE Ms.(8) BLT-4 11. Give the advantages of gas laser. (i) Point out the working principle of Electro optic modulator with a neat BLT-4 sketch . Analyze the features of fiber optic sensors and point out the uses in the BLT-4 measurement of current and voltage. Examine Double hetero structure Laser. (i) What is the role of optical fibers in the measurement of pressure? BLT-1 Describe in detail (10) (ii) Give an account on “Miore Fringes ” (6) BLT-1 8. (8) BLT-4 9. Examine the principle of Mode Locking .(8) (ii) Explain different applications of modulators used in fiber optic BLT-1 instrumentation system. Rathna Priya A.P (O. BLT-1 8. Construct a fiber optic sensor with the method of polarization technique.(8) (ii) Categorize the design and operation of optical fiber target flow sensor. BLT-2 4. Differentiate the functions of lidar and laser tracking. BLT-3 Prepared by Mr. (i) Describe the fibre optics instrumentation system for the measurement of BLT-1 strain . BLT-1 5. (16) BLT-6 Unit -3 LASER FUNDAMENTALS PART –A 1. (16) 14.G)-EIE . (8) 13. (10) (ii)Discuss the different micro bending sensors and their basic principles in BLT-2 detail (6) 10. K.EIE dept 2016-2017(ODD) 6. Discuss the significance of fibre optic sensor with other commercial sensor BLT-2 and describe in detail. Issan Raj A. Describe the principle of electron beam pumping. K.EIE dept 2016-2017(ODD) 10. Obtain its rate equations for steady state output (16) 6. BLT-5 13. BLT-1 16. BLT-2 PART-B 1.1 9. modes and threshold BLT-3 conditions.P (O. Generalize the properties of LASER. analyze how four level laser system is BLT-4 advantageous to three level laser system . Discuss about the Resonator configuration of a laser setup.P (O. With the help of diagram explain BLT-1 Prepared by Mr. (8) (ii) Describe the structure of multiplication of signals inside a cavity with a BLT-2 neat diagram (8) 8.1 (ii) With neat diagram explain the working of arc excited gas laser. BLT-6 12. Describe the characteristics of Lasers. Generalize the significance of pumping in lasers.62x10-34J? 11.(8+8) 3. Calculate the frequency of stimulating photon if an atom is stimulated form BLT-5 the state of 1x10-34J to an excited level of 7. Write short notes on (8+8) BLT-1 (i) LIDAR (ii) Laser Tracking 4. Define the term population inversion. BLT-2 Give Examples. Describe about cavity damping. With the help of an energy diagram. VALLIAMMAI ENGINEERING COLLEGE. BLT-6 18.G)-EIE Ms. Classify lasers and explain the construction and working of semiconductor BLT-4 laser. BLT-1 14. R. Define LASER. Summarize the advantages and applications of Fabry Perot cavity. Describe for a Fabry Perot resonator laser diode. (16) 5. Analyse how the modulation rate of the laser diode is increased? BLT-4 15. Discuss the advantages and disadvantages of solid state laser.G)-EIE . (i) List the properties of laser and also give its merits compared with LED. BLT-1 20. (8) BLT. (8+8) 2. (i) How Q Switching is performed using laser? (6) BLT-5 (ii) Explain gas laser with an example (10). Rathna Priya A. BLT-2 19. BLT-5 10. Define “Q-switching ”.(8) BLT. BLT-2 17. Examine the construction and operation of solid state lasers with neat diagram BLT-3 (16) 7 (i) Differentiate between direct and indirect band gap semiconductors.Also explain the construction and working of a four level laser. Also explain about BLT-2 the different modes by which laser is operated for generation of Ultra short pulses. Apply the techniques used for distance measurement using Laser. BLT-1 12. Issan Raj A.EIE dept 2016-2017(ODD) the principle of three level and four level lasers. Point out any two uses of laser in industry. (i) Write technical notes on BLT-1 (1) Laser modes (2) Frequency Chirping. (16) Unit -4 INDUSTRIAL APPLICATIONS OF LASER PART –A 1. BLT-2 9. BLT-3 4.P (O. Rathna Priya A. BLT-3 7. Classify the common types of lasers used for material processing. BLT-2 17. BLT-3 2. BLT-2 8.G)-EIE .(6) BLT-3 (ii) Explain the working principle of Ruby laser with a neat diagram.P (O. Describe the working of shielding gas during material processing by lasers. Define laser vaporization. Assess which type of materials oxidation cutting is preferred? Why? BLT-5 16. List the uses of lasers in the measurement of acceleration. BLT-6 11. BLT-4 13. BLT-1 3. R. Outline the advantages of laser welding. BLT-1 6. BLT-6 20. K. Analyze how a homo junction and hetero junction laser be developed using BLT-4 electron beam principle. BLT-1 15. Rewrite the significance of trimming of materials by lasers. Why population inversion is significant in lasers? BLT-5 Prepared by Mr. (i) Discuss the construction and working of carbon dioxide laser. Derive BLT-3 an expression for threshold gain for laser. Write any two industrial applications of laser. (i) What are the different types of laser cavities? Draw and explain them. List the merits of Laser Heating. BLT-1 10. (6+5+5) 11. BLT-1 5. (8) (ii) Describe the working principle of He-Ne gas laser with a neat BLT-1 diagram. Classify the different modes of laser heating. Discuss laser action? What are the conditions to achieve it? BLT-2 19.(10) 13.(8) BLT-2 12. Give the advantages of using laser in industry. Point out the application of laser trimming and welding. BLT-4 18. Write the active material in laser. What are the features of laser melting. VALLIAMMAI ENGINEERING COLLEGE. Discuss laser range finder. BLT-4 14. Summarize the merits and demerits of laser welding. (8) BLT-2 (ii) Discuss the advantages of gas laser over solid state laser.(8) 14.G)-EIE Ms. (4) BLT-5 9. Write the principle involved in the design of resistors. (i) Construct a basic atom interferometry and explain the concepts BLT-6 involved.G)-EIE .P (O. R. (12) BLT-5 (ii) Explain the advantages of laser heating. Issan Raj A. Describe the principle of lasers for measurement of length with neat block BLT-1 diagram. (i) Assess the different steps involved in laser materials processing.(12) (ii) Explain briefly the principle in LIDAR. (16) 2.G)-EIE Ms. (16) 6. Give the theory of material processing and explain the trimming of materials BLT-2 by laser. Rathna Priya A. (16) 3. (i) List the different modes of laser welding process. Examine the industrial application of LASER in Material Removal. K.P (O. (4) BLT-6 11.EIE dept 2016-2017(ODD) PART-B 1. (16) 4. capacitors and other BLT-1 electronic equipments using lasers. Analyze the role of laser for industrial measurements and explain any one in BLT-4 detail. (16) BLT-3 12. (16) BLT-5 13. Define the principle of laser for the measurement of cold atom interferometry BLT-1 and explain it (16) Unit -5 HOLOGRAM AND MEDICAL APPLICATIONS PART –A Prepared by Mr.(8) BLT-1 (ii) Describe the apparatus used for laser drilling and explain its working. VALLIAMMAI ENGINEERING COLLEGE.(12) (ii) Explain briefly laser melting. Describe about Laser Doppler Velocimetry for Fluid velocity and acceleration BLT-2 measurement. (16) 5. Explain how the laser is used in material processing.(16) BLT-4 14. Illustrate the applications of laser with examples in (10+6) BLT-3 (i) Heating (ii) Vaporization 7.(8) BLT-1 10. (i) Categorize how the current and distance can be measured by using BLT-4 laser. (4) BLT-4 8. How will you measure the voltage and velocity by using laser? Explain. Distinguish between Oncology and Gynecology. 7. Examine the medical applications of LASER in gynecology and oncology (16) BLT-3 4. BLT-1 8. BLT-3 11. BLT-1 20. R. BLT-2 10. Examine the need of holography and compare holography with commercial BLT-3 photographic techniques and explain in detail. BLT-1 13.P (O. BLT-1 18. BLT-1 19. List the types of laser used in Brain Tumor Treatment.P (O. K. (i) Describe the advantages and potential applications of holography. BLT-4 5. State the procedure in the removal of tumors in vocal cords using laser. (8 ) BLT-1 Prepared by Mr. Outline the advantages of laser in plastic surgery.G)-EIE . Assess how photocoagulation of ocular tissues done in retina? BLT-5 14. BLT-1 3. (i) Explain any two medical applications of laser. Summarize about wavefront reconstruction.(16) 2. BLT-5 16. Point out the limitations of photographic film compared to hologram? BLT-4 12. Illustrate the precautions to be followed while handling Lasers for clinical BLT-3 applications. List any three lasers and their main use with respect to medical field. BLT-6 6. Interpret the requirements of laser instruments for plastic surgery. BLT-2 PART-B 1. Rathna Priya A. Discuss the principle involved in holographic inferometry. Describe the application of laser in (8+8) BLT-2 (i) Brain surgery (ii) Plastic surgery 6. VALLIAMMAI ENGINEERING COLLEGE. Examine the principle of HNDT.(12) BLT-5 ii) Assess how laser is used for removal of tumors of vocal cards (4) BLT-5 8.(4+12) 3. Classify the uses of laser in medicine. Compare hologram and photographic film. Summarize the advantages of laser surgery. Describe the components of Hologram. BLT-3 9.EIE dept 2016-2017(ODD) 1.G)-EIE Ms. List the potential applications of Holographic interferometry. BLT-2 4. Classify the methods of holography and explain each method in detail with BLT-4 suitable diagrams (16) 5. Analyze the principles of holographic inferometry and its application in Non BLT-4 destructive Testing of materials. Analyze why carbondioxide laser is preferred in surgery? BLT-4 15. (8) BLT-1 (ii) Describe the principle of holographic recording and reconstruction. Issan Raj A. Summarize the spectral features and conditions involved in holography for NDT BLT-2 (16) 7. BLT-2 17. Describe the basic principle of holographic reconstruction. What happens if laser interacts with tissue? BLT-6 2. Give an account of laser surgery instruments which are used in plastic surgery BLT-2 and gynaecology.P (O. K. (i) What is the advantage of using LASER in the field of medicine compared BLT-5 with the other older techniques. Write technical note on – (i)Laser based Microsurgery (8) BLT-1 (ii) Endoscopes (8) 14. Describe the techniques involved in PDT and explain in detail. (16) BLT-2 11. R. VALLIAMMAI ENGINEERING COLLEGE. (16 ) BLT-1 10.(6) (ii) Assess how photocoagulation of ocular tissues done in retina and explain BLT-5 in detail (10) Prepared by Mr.(8) (ii) Develop a 3D image using the different holographic procedures used in the BLT-6 nondestructive Testing of Engineering components (8) 13.(16) 12.EIE dept 2016-2017(ODD) 9.P (O.G)-EIE Ms. (i) Interpret the different stages involved in the capturization of 3D image with BLT-6 suitable diagrams. Issan Raj A. Rathna Priya A. What are the uses of LASER in the field of medicine and explain in detail.G)-EIE .
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