Yes it is. That is why you get a scrachy and unclear sound.
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atomic
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utr
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Barbara Blind has written:
'Response of two-level atoms to intense amplitude modulated
laser beams' -- subject(s): Laser beams, Atoms
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Applications of junction lasers are in terms of laser output
beams as information carriers. Since this output beam needed to be
modulated in terms of intensity, the junction laser is handy. The
junction laser supplies regulated current.