| 29th August 2020 01:12 PM | |
| Rajkumar Agarwal | Cluster University M.Sc Physics Sem 3 LasersSemesterIII Syllabus Cluster University M.Sc Physics Sem 3 LasersSemesterIII Syllabus CLUSTER UNIVERSITY SRINAGAR, KASHMIR SYLLABUS– M.Sc. PHYSICS Page 38 of 56 SEMESTER III Lasers Course No: PHY17-310OE Max. Marks: 50 Duration of Examination: 1:30 Hrs. External Examination: 40 No. of credits: 02 Internal Assessment: 10 UNIT – I Absorption, spontaneous and stimulated emission. Einstein coefficients, Trasition propability and lifetime of an atom in an excited state. Population inversion. Laser rate equations: The three level and four levelsystems. Line broadening mechanism. Shape and width of spectral lines. Optical resonators: Qualityfactor. Losses inside the cavity. Threshold conditions. Schawlow-Townes condition. Transverse and longitudinal mode selection. UNIT – II Laser Systems He-Ne laser. CO2 laser. Four level solid state lasers. Dye lasers. Ar+ laser. Excimer lasers. Properties of laser beam: directionality, mono chromacity, intensity, coherence (temporal and Spatial). Applications oflasers: Laser induced fusion. Isotope separation. Textbooks: 1) Thyagarayan, K. and Ghatak, A.K.: LASERS: Theory & Application 2) Laud, B.B.: Laser and Non-linear Optics (Wetey-Eastern) |
