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Laser-Induced Dynamic Gratings (Paperback, Softcover reprint of the original 1st ed. 1986)
Loot Price: R1,551
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Laser-Induced Dynamic Gratings (Paperback, Softcover reprint of the original 1st ed. 1986)
Series: Springer Series in Optical Sciences, 50
Expected to ship within 10 - 15 working days
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The invention ofthe laser 25years ago resulted in powerfullight
sources which led to the observation of unexpected and striking
phenomena. New fields of science such as holography and nonlinear
optics developed constituting the basis of this volume. The
classical principle of linear superposition of light wavesdoes not
hold anymore. Two laser beams crossing in a suitable material may
produce a set of new beams with different directions and
frequencies. The interaction of light waves can be understood by
considering the optical grating structures which develop in the
overlap region. The optical properties of matter become spatially
modulated in the interference region of two light waves. Permanent
holographic gratings have been produced in this way by photographic
processes for many years. In contrast, dynamic or transient
gratings disappear after the inducing light source, usually a
laser, has been switched off. The grating amplitude is controlled
by the light intensity. Dynamic gratings have been induced in a
large number ofsolids, liquids, and gases, and are detected by
diffraction, 'forced light scattering' of a third probing beam, or
by self-diffraction of the light waves inducing the grating. The
combined interference and diffraction effect corresponds to
four-wave mixing (FWM) in the language of nonlinear optics. The
process is called degenerate ifthe frequenciesofthe three incident
wavesand the scattered wave are equal. Degenerate four-wave mixing
(DFWM) is a simple method to achieve phase conjugation, i.e. to
generate a wave which propagates time reversed with respect to an
incident wave.
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