IDRR APRIL -MAY -JUNE 2020 - Flipbook - Page 31
LASER DENTISTRY
Fig. 2
Electromagnetic spectrum and dental laser wavelengths
30 years for the researchers to understand what he
really meant. It was only later that we learnt how to
merge the niche divides between classical physics
and modern physics to suit our needs. Stimulated
emission is where, a single atom stimulates many
others to produce the effect of amplification which is
the very base for the development of lasers. In this
process, the ejected electromagnetic radiations have
the same frequency and phase as the incident radiation.
Basic principle of production of lasers derived from
stimulated emission can be illustrated as below. 2,3
wavelength gamma rays, to visible light, to longer
wavelengths like microwaves. When Charles H. Towne
in 1950 was working with microwaves, he got amplified
stimulated radiation by passing it through ammonia
gas. Since his work was focused on microwaves. he
named this phenomenon a MASER which stands for
Microwave amplification by stimulated emission of
radiation. This device was basically used for communication
systems. Later on, other wavelengths were used on
similar lines to produce stimulated emission of radiation
which we call today as a LASER - Light amplification
by stimulated emission of radiation.2,4,5
The Journey from MASER to LASER!
On a broader scale, the Electromagnetic spectrum is
a combination of various photonic quanta with
relative wavelengths. The spectrum is from short
July-August-September 2019
A WALK DOWN THE LASER LANE..
In 1959, Gordon Gould proposed that stimulated emission
could be used to amplify the light. He discussed about
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