DKT A/S
Fanoevej 6
DK-4060 Kirke Saaby
Tlf
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Network Managed Optical Amplifier
User’s Manual Rev 1.3
OFA-CCS/CCD Series
June 2014
11
green to red.
The LOP alarm turns off when the output optical power of the EDFA is normal and the
color of status LED changes red to green.
BIAS Alarm
The Pump Laser Diode provides pumping energy to the Erbium Doped Fiber in the EDFA.
The pumping power of the Pump Laser Diode is controlled by applying a bias current. If
the bias current of the pump laser diode is loaded above 95% of the end-of-life (EOL)
value, the pump bias current alarm is activated. The EOL bias current is defined as 120%
of the beginning-of-life (BOL) bias current. The pump laser diode driver is limited to
never exceed the EOL bias level. This is an indicating LED for an over current
condition of the Pump Laser Diode bias current.
If the BIAS alarm is activated, the color of status LED changes green to yellow.
TEMP Alarm
The internal temperature of the Pump Laser Diode must be kept the operating range. If
the internal temperature of the Pump Laser Diode goes outside of the operational range,
the TEMP alarm is activated.
If the TEMP alarm signal is activated, the color of status LED changes green to yellow.
POWER Alarm
The voltage of power supply must be kept the operating range. If the voltage of power
supply goes outside of the operational range, the POWER alarm is activated.
If the POWER alarm signal is activated, the color of status LED changes green to yellow.
FAN Alarm
The fans must be kept the operating. If the fans are not operated, the FAN alarm is
activated.
If the FAN alarm signal is activated, the color of status LED changes green to yellow.
3.2.3
Rear Panel
The rear panel of the Shelf Type EDFA consists of two pluggable type power modules
and two fans.
Figure 3. Rear Panel
