<s>
Raman	B-Algorithm
amplification	I-Algorithm
is	O
based	O
on	O
the	O
stimulated	B-Architecture
Raman	I-Architecture
scattering	I-Architecture
(	O
SRS	O
)	O
phenomenon	O
,	O
when	O
a	O
lower	O
frequency	O
'	O
signal	O
 '	O
photon	B-Application
induces	O
the	O
inelastic	O
scattering	O
of	O
a	O
higher-frequency	O
'	O
pump	O
 '	O
photon	B-Application
in	O
an	O
optical	O
medium	O
in	O
the	O
nonlinear	O
regime	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
this	O
,	O
another	O
'	O
signal	O
 '	O
photon	B-Application
is	O
produced	O
,	O
with	O
the	O
surplus	O
energy	O
resonantly	O
passed	O
to	O
the	O
vibrational	O
states	O
of	O
the	O
medium	O
.	O
</s>
<s>
Optical	B-Architecture
fiber	I-Architecture
is	O
today	O
mostly	O
used	O
as	O
the	O
nonlinear	O
medium	O
for	O
SRS	O
,	O
for	O
telecom	O
purposes	O
;	O
in	O
this	O
case	O
it	O
is	O
characterized	O
by	O
a	O
resonance	O
frequency	O
downshift	O
of	O
~	O
11	O
THz	O
(	O
corresponding	O
to	O
a	O
wavelength	O
shift	O
at	O
~	O
1550nm	O
of	O
~	O
90nm	O
)	O
.	O
</s>
<s>
In	O
addition	O
to	O
applications	O
in	O
nonlinear	O
and	O
ultrafast	O
optics	O
,	O
Raman	B-Algorithm
amplification	I-Algorithm
is	O
used	O
in	O
optical	O
telecommunications	O
,	O
allowing	O
all-band	O
wavelength	O
coverage	O
and	O
in-line	O
distributed	O
signal	O
amplification	O
.	O
</s>
