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In a four level laser amplifier, the relative energy of states, measured from the ground state E, = 0, are E, = 0.55 eV, E, = 2.20 eV, and Ez = 2.65 eV. i) Optical pumping is used to achieve the population inversion. What is the maximum wavelength and colour of light used for pumping? What is the wavelength of the light which can be amplified by this system?

In a four level laser amplifier, the relative energy of states, measured from the ground state E, = 0, are E, = 0.55 eV, E, = 2.20 eV, and Ez = 2.65 eV. i) Optical pumping is used to achieve the population inversion. What is the maximum wavelength and colour of light used for pumping? What is the wavelength of the light which can be amplified by this system?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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In a four level laser amplifier, the relative energy of states, measured from the ground state E, = 0, are E, = 0.55 eV, E2 = 2.20 eV, and Ez = 2.65 eV. i) Optical pumping is used to achieve the population inversion. What is the maximum wavelength and colour of light used for pumping? ii) What is the wavelength of the light which can be amplified by this system?
Transcribed Image Text:In a four level laser amplifier, the relative energy of states, measured from the ground state E, = 0, are E, = 0.55 eV, E2 = 2.20 eV, and Ez = 2.65 eV. i) Optical pumping is used to achieve the population inversion. What is the maximum wavelength and colour of light used for pumping? ii) What is the wavelength of the light which can be amplified by this system?
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