- 16 A Two Level System Has An Energy Difference Of Ae 2 5 Ev Assuming The Emission Only Has Natural Broadening And The 1 (52.47 KiB) Viewed 43 times
16 A two-level system has an energy difference of AE= 2.5 eV. Assuming the emission only has natural broadening and the
-
answerhappygod
- Site Admin
- Posts: 899604
- Joined: Mon Aug 02, 2021 8:13 am
16 A two-level system has an energy difference of AE= 2.5 eV. Assuming the emission only has natural broadening and the
16 A two-level system has an energy difference of AE= 2.5 eV. Assuming the emission only has natural broadening and the frequency width of the emission line is 7.5 x 107 Hz. (i) What is the population ratio Nz/N1 at T = 300 K? At what temperature will the population ratio be doubled from the room temperature? [3] (ii) What is the Einstein coefficient Azi? [2] (ii) An incoming photon causes a stimulated emission of the system. What is the frequency of the incoming photon? [2] (iv) Describe the procedures of spontaneous emission and stimulated emission, respectively, and specify the different properties of light emitted from the two mechanisms. [6] (v) Sketch the diagrams of a 3-level and a 4-level lasing system, respectively. Describe the working principles and explain why a 4-level system is considered to be more effective in achieving population inversion than a 3-level system. [7]
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!