<s>
A	O
figure-8	B-Device
laser	I-Device
is	O
a	O
fiber	B-Device
laser	I-Device
with	O
a	O
figure-8-shaped	O
ring	O
resonator	O
.	O
</s>
<s>
The	O
active	O
medium	O
of	O
the	O
laser	O
is	O
optical	B-Architecture
fiber	I-Architecture
with	O
its	O
core	B-Device
doped	O
with	O
rare-earth	O
ions	O
.	O
</s>
<s>
In	O
1992	O
a	O
figure-8	B-Device
laser	I-Device
was	O
built	O
with	O
a	O
smaller	O
loop	O
length	O
of	O
1.6m	O
and	O
a	O
larger	O
loop	O
length	O
of	O
60.8m	O
for	O
generation	O
of	O
315fs	O
pulses	O
with	O
repetition	O
rate	O
125MHz	O
.	O
</s>
