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Additional
Optical cavity
English Wikipedia - The Free Encyclopedia
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Optical cavity
An
optical cavity
,
resonating cavity
or
optical resonator
is an arrangement of
mirrors
that forms a
standing wave
cavity resonator
for
light waves
. Optical cavities are a major component of
lasers
, surrounding the
gain medium
and providing
feedback
of the laser light. They are also used in
optical parametric oscillators
and some
interferometers
. Light confined in the cavity reflects multiple times producing
standing waves
for certain
resonance frequencies
. The standing wave patterns produced are called modes;
longitudinal modes
differ only in frequency while
transverse modes
differ for different frequencies and have different intensity patterns across the cross section of the beam.
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