Solar-Pumped Solid-State Laser Theory

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Properties of laser radiation and photons are firstly introduced. Planck´s law, Stefan-Boltzmann’s law and Wien´s law are then presented. Spontaneous emission, stimulated absorption, stimulated emission, Einstein coefficients are explained, leading to the definition of important parameters such as laser gain and stimulated emission cross section. Upper level laser rate equation, light increment along an active medium and laser oscillation threshold condition are consequently defined. More importantly, laser rate equation involving a laser resonant cavity is presented, allowing laser photon density calculation within the resonant cavity. Solar concentration ratio, transfer efficiency, absorption efficiency, upper state efficiency, beam overlap efficiency and output coupling efficiency are also explained. A modified analytical method for solar laser power calculation is consequently put forward. Solar laser output power are finally calculated by the modified, classical, Zemax® and LASCAD™ analysis methods.
Original languageEnglish
Title of host publicationSolar-Pumped Lasers
Subtitle of host publicationWith Examples of Numerical Analysis of Solid-State Lasers
EditorsDawei Liang, Joana Almeida, Cláudia Vistas, Bruno Tibúrcio, Dário Garcia
Place of PublicationCham
Number of pages71
ISBN (Electronic)978-3-031-24785-9
ISBN (Print)978-3-031-24784-2
Publication statusPublished - 2023

Publication series

NameGreen Energy and Technology
ISSN (Print)1865-3529
ISSN (Electronic)1865-3537


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