Download LASER LIGHT DYNAMICS by H. Haken PDF
By H. Haken
This quantity bargains with laser physics emphasizing laser concept from a actual viewpoint. It takes into consideration latest advancements focussing at the dynamics. continuing from easy to tougher questions, the booklet treats, between different subject matters: commonplace experimental laser structures, intensities of laser gentle in unmarried and multimode lasers, mode pageant, hole-burning, Q-switched lasers, relaxation-oscillations, frequency shifts, inhabitants pulsations, mode-locking, ultrashort pulses, self-pulsing, laser mild chaos, instability hierarchies, laser gyro, optical bistability, optical transistor, two-photon laser, laser line width, Hanbury-Brown-Twiss scan, depth correlations, photon records, quantum classical correspondence, laser phase-transition analogy, the laser as a synergetic system.
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Extra resources for LASER LIGHT DYNAMICS
Example text
1. The laser condition Let us consider the laser depicted in fig. 1 more closely, and let us discuss the tasks of its individual parts. The two mirrors mounted at the endfaces fulfil the following functions. When we treat light as a wave, between the two mirrors only standing waves can be formed. Their wave-lengths, A, are connected with the distance between the mirrors, L, by the relation n A / 2 = L where n is an integer. In section 3 we shall briefly discuss the influence of the finite size of mirrors on the formation of these standing waves.
In these molecules the individual atoms can perform oscillations. The three fundamental kinds of oscillations are shown in fig. 20. According to quantum theory the different kinds of oscillations must be quantized so that discrete energy levels result. The energy level diagram belonging to some low lying oscillation levels of CO, is represented in fig. 21. One of the laser processes rests on the optical transition between the levels which are denoted in fig. 21 by 00'1 and 10'0. The excitation of the uppermost level is usually achieved in a plasma discharge in which N2 and He participate in addition to CO,.
As is known from quantum mechanics, the uncertainty relation AVT3 1 holds. 3 we shall get to know a number of pump mechanisms by means of which we may achieve the necessary inversion. 0 ms. 22 x lo9 Hz. How big is the number of modes in these cases if the modes are axial modes ( E =sin k x ) in a Fabry-Perot interferometer? 4) for the following cases: length of the laser resonator (=distance between the mirrors) L = 1 cm, 10 cm, 100 cm, reflectivity R = 9'9%,90%, 10%. How do the results change if the index of refraction is n = 2, n = 3?