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Old 29th August 2020, 01:12 PM
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Default 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)
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