Solid-State Laser Engineering by Koechner W.

By Koechner W.

This publication, written from an commercial vantage element, describes the features, layout, and operation of solid-state lasers. because the identify implies, the emphasis is put on the technical points of those platforms instead of on theoretical ideas. long mathematicalderivationshavebeenavoidedbecausethetheoryisnottreatedasanend initself,butratherservestoexplaintheexperimentalresultsobservedinthelaboratory. despite the fact that, there's suf?cient theoretical heritage supplied in every one bankruptcy to make the e-book self-contained. Solid-State Laser Engineering is especially meant for the practising scientist or engineer who's drawn to the layout or use of solid-state lasers. The reaction from readers has proven that the great remedy of the topic makes the paintings priceless additionally to scholars of laser physics who are looking to complement their theoretical knowledgewiththeengineeringaspectsoflasers.Althoughnotwrittenintheformofa collegetext,thebookmightbeusedinanadvancedcollegecourseonlasertechnology. After a historic review, the ebook begins with a assessment of the fundamental strategies of laser physics (Chap. 1). Analytical expressions of the edge , achieve, and output of laser oscillators are derived in Chap. three. An oscillator through a number of ampli?ers is a typical structure in pulsed solid-state laser structures to spice up output power. strength garage and achieve of ampli?ers is mentioned in Chap. four. 4 chapters take care of the elemental subsystems of solid-state lasers. those are the lively medium, the optical resonator, the pumping approach, and the thermal mana- ment. homes of solid-state laser hosts and energetic ions are reviewed in Chap. 2.

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In this chapter we consider the properties of various host materials and activator/sensitizer combinations. 6. 1] in 1958. 2] was achieved in 1960 using ruby (eil+: Ah0 3 ), a crystalline solid system. 3]. 4] demonstrated Iaser action in neodymiumdoped glass. 5] using Nd3+: CaW04. Since then Iaser action has been achieved from trivalent rare earths (Nd3+, Er3+, Ho3+, Ce3+, Tm3+, Pr3+, Gd3+, Eu 3+, Yb3+), divalent rare earths (Sm2+, Dy 2+, Tm2+), transition metals (Cr3+, Ni 2+, Co2+, Ti 3+, v2+), and the actinide ion U 3+ embedded in various host materials.

58), we have 8n2 - 8t n2 = -nzmpc- - ~ + W. (no - nz). 71) where 7 21 = A2J 1 is the effective radiative lifetime associated with the Iaser line. In the equation for the rate of change of the upper Iaser Ievel we have again taken into account the fact that not all atoms pumped to Ievel 3 will end up at the upper Iaser Ievel. 72) where the quantum efficiency 'TJQ depends on the branching ratios which are the relative relaxation rates for the atoms along the various possible downward paths, 'TJQ = ( 1 + -732 + -732 ) 731 730 -1 ::; 1.

The rate-equation approach used in this section involves a number of simplifying assumptions; in using a single set of rate equations we are ignoring longitudinal and radial variations of the radiation within the Iaser medium. In spite of these lirnitations, the simple rate-equation approach remains a useful tool and, properly used, provides a great deal of insight into the behavior of real solid-state Iaser devices. We will derive from the rate equations the threshold condition for Iaser actions, and obtain a first-order approximation of the relaxation oscillations in a solid-state Iaser.

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