1. An atom has two atomic levels separated by an energy gap of the2.26 eV. What is the temperature should make the populationinversion N/N, equal to half? When T= 37824.7 K2. The length of the optical cavity in He-Ne laser of a wavelength of632.8 nm is 55 (cm]. Find the approximate number of longitudinallaser modes.m= 1.7x 103. A Ruby laser contains a crystal length (4cm) with a refractiveindex of (1.78). The peak emission wavelength from the device is(0.55µm). Determine the number of longitudinal modes and thebandwidth of the net gain.m=145454Au= 3x1014 Hz4. Resonator for laser consisting of two concave mirrors, Nd: YAGand quality factor M=1 Calculate:- The TEM00 at the center and on the mirrors (wo,w1,w2).The diffraction angle of the laser beam (@aiv).NYAGfdem

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1. An atom has two atomic levels separated by an energy gap of the 2.26 eV. What is the temperature should make the population inversion N/N, equal to half? When T= 37824.7 K 2. The length of the optical cavity in He-Ne laser of a wavelength of 632.8 nm is 55 (cm]. Find the approximate number of longitudinal laser modes. m= 1.7x 10%

1. An atom has two atomic levels separated by an energy gap of the 2.26 eV. What is the temperature should make the population inversion N/N, equal to half? When T= 37824.7 K 2. The length of the optical cavity in He-Ne laser of a wavelength of 632.8 nm is 55 (cm]. Find the approximate number of longitudinal laser modes. m= 1.7x 10%

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter12: The Solid State

Section: Chapter Questions

Problem 20P

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