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Unit 1: Fundamentals of Photonics. Topic: LASER. LASER (Light Amplification by Stimulated Emission of Radiation):.
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transition is called as induced absorption.. 7.. Spontaneous Emission:.
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[image] 100% reflecting reflecting Active pump. [image] (a) Bending mode r structure of C02 (b) Asymmetric Stretch mode (e) Symmetric Stretch.
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molecular axis.. (b) Asymmetric mode. In this mode of vibration, two oxygen atoms move in one direction while carbon atoms.
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inversion takes place with respect to the lower lasing levels E.
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developed photographic plate is called as Hologram consisting of alternate dark and bright.
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. Holographic Security Features: Holography creates secure identification features,.
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4.. Lasers are used in computer printers.. 5.. Lasers are used for producing three-dimensional pictures in space without the use of.