Dr.A.P.J.Abdul Kalam University MSC PHYSICS IV SEM JUNE20 Laser Physics [MSP402T] Aug-Sep 2020 Question Paper

Dr.A.P.J.Abdul Kalam University Old Question Papers

Master of Science (Physics)

Fourth Semester Main Examination, Aug-Sep 2020

Laser Physics [MSP402T]

Time: 3:00 Hrs Max Marks 85

Note: Attempt all questions.

Each question has two parts. 

Part A is 10 marks and part B is 7 marks.

Q.1 (a) What are characteristics of laser beam? Mention its uses.

(b) Discuss laser pumping in two levels and three level systems.

OR

(a) Explain principle of laser and essential requirement to produce laser action.

(b) Discuss various properties of laser beam in details.

Q.2 (a) Explain different types of coherence properties in laser.

(b) Write note on resonators and explain their vibrational modes.

OR

(b) What is optical resonator? Discuss the vibrational mode of resonator.

(b) Distinguish between spatial & temporal coherence in laser emission.

Q.3 (a) Write construction and working of He:Ne gas laser using suitable diagram.

(b) Write a note on gas laser.

OR

(a) Explain construction & working of Nd-YAG laser.

(b) Explain reconstruction & working holography.

Q.4 (a) Explain laser holography, application & working of Co2 laser.

(b) Discuss the application of laser in medicine.

OR

(a) Discuss various uses of laser in material processing.

(b) Explain reconstruction of image.

Q.5 (a) What do you mean by non-linear optics harmonic generation? Explain the process of

harmonic generation.

(b) What do you mean by phase matching in non-linear optics?

OR

(a) What is self focusing of light?

(b) What is optical mixing?

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