Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Data Sheet, Rev. 1
September 2001
Block Diagram
OPTICAL
OUTPUT
SIGNAL
OPTICAL
OPTICAL GAIN
INPUT
INPUT TAP
OUTPUT TAP
SIGNAL
PD #1
INPUT POWER
MONITOR
PD #2
OUTPUT POWER
MONITOR
MICROCONTROLLER
1-904 (C)
Figure 1. W1724-Type EDFA Block Diagram
Pin Information
Table 1. Pin Descriptions for a Microcontrolled (Full) Amplifier
Pin
Description
5.0 V (±0.25 V)
Pin
Description
1
2
14
15
16
17
18
19
20
21
22
23
24
25
—
GND
GND
GND
GND
5.0 V (±0.25 V)
3
5.0 V (±0.25 V)
4
5.0 V (±0.25 V)
Reserved1
Reserved1
5
RS-232 OUT (TTL)
Loss of Input Power Alarm6
Reserved1
Amplifier Disable Input7
RS-232 IN (TTL)
Reserved1
6
7
EDFA Temperature Alarm
Loss of Output Power Alarm2
Pumps Bias Alarm3
Pumps Temperature Alarm4
EDFA Shutdown Override5
5.0 V (±0.25 V)
8
9
10
11
12
13
5.0 V (±0.25 V)
GND
GND
—
1. Do not connect to reserved pins.
2. Normal = TTL low, alarm = TTL high if the output power falls 2 dB below the minimum value.
3. Normal = TTL low, alarm = TTL high if pump bias exceeds 95% of its end-of-life value.
4. Normal = TTL low, alarm = TTL high if pump temperature exceeds 35 °C.
5. The EDFA is equipped with an optical transient suppression feature when this pin is tied to GND. The EDFA will turn all pumps off, if the
input power is too low. Tying this pin to 5 V will disable this feature; however, damage to the optical connectors and components may occur if
the amplifier is turned on without the presence of an optical signal.
6. Normal = TTL low, alarm = TTL high if input power is less than 2 dB below minimum PIN.
7. Amplifier enable (all pumps are on) = TTL low, amplifier disable (all pumps are off) = TTL high.
3
Agere Systems Inc.