User
’s manual
11
Pump current change a
lot, pump current alarm
1.
Pump laser characteristic change
2.
Internal
circuit
detection
deviation
3.
Pump laser damaged
1.
Check
environment
temperature is too high.
The working temperature
of
chassis
is
within
0-50
℃
. Usually, when the
ventilation is not good, the
temperature
inside
the
chassis is much higher
than
environment
temperature.
2.
Check the chassis Heat
dissipation
ventilation
environment whether is
good.
3.
Whether the ventilation
holes are blocked on both
sides of the chassis.
4.
Whether the EDFA is
placed
between
the
equipment with the heat
source up and down, and
the
distance
of
the
equipment is less than
20mm.
Pump
output optical
power decreases, output
optical power alarm
1.
Internal
circuit
detection
deviation
2.
Pump laser degradation
3.
Pump laser damaged
Pump laser refrigeration
current
high,
TEC
current alarm
1.
EDFA environment temperature
too high
2.
Pump laser refrigeration is
invalid
3.
Pump laser damaged
Pump laser temperature
high, pump temperature
alarm
1.
environment temperature too
high
2.
Pump laser refrigeration is
invalid