CWOA-A1-L1-D Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – LASER CONTROLLER FOR OPTICAL AMPLIFIERS

Analog Technologies, Inc.
CWOA-A1-L1-D
LASER CONTROLLER FOR OPTICAL AMPLIFIERS
Description
This laser controller is designed for driving the pump laser in optical amplifiers, such as Raman amplifier
and EDFA, with high stability and reliability. It drives the laser in four modes: constant current, constant
laser power, constant output power, and constant gain. It also provides these protection functions: over
current, over laser power, over output power, and over gain.
Interface and Control
Pin # Pin
Name
Type
Description
Note
1
GND Analog power Connect ADC and DAC ground to here.
2
ILIM Analog input Laser current limit set, 0 to 2.5V.
3 OPLIM Analog input Optical output power limit set, 0 to 2.5V.
4 LPLIM Analog input Laser power limit set, 0 to 2.5V.
5 GNLIM Analog input Constant gain limit set, 0 to 2.5V.
6
LIS Analog input Laser current set, 0 to 2.5V.
7
OPS Analog input Optical output power set, 0 to 2.5V.
8
LPS Analog input Laser output power set, 0 to 2.5V.
9
GNS Analog input Constant gain set, 0 to 2.5V.
10 OPFB Analog output Output photo diode feedback, 0 to 2.5V.
11
OPA
Analog input Output photo diode anode, 0 to 2.5V.
12 LPFB Analog output Laser photo diode feedback, 0 to 2.5V.
13
LPA
Analog input Laser photo diode anode, 0 to 2.5V.
14 IPFB Analog output Input photo diode feedback, 0 to 2.5V.
15
IPA
Analog input Input photo diode anode, 0 to 2.5V.
16
2.5V Analog output Voltage reference, 2.5V.
17 LPGD Digital output Loop good, optical amplifier is working at the set
mode.
18
IPO Analog output Input power output voltage, 0 to 2.5V.
19
LPO Analog output Laser power output voltage, 0 to 2.5V.
20
OPO Analog output Output power output voltage, 0 to 2.5V.
21
OIO Analog output Laser current output voltage, 0 to 2.5V.
22
NC
NC
No connect.
23
M1
Digital input Mode set 1.
24
M2
Digital input Mode set 2. M1M2:
00 = constant current mode,
01 = constant laser power mode,
10 = constant output power mode,
11 = constant gain mode.
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Set by DAC or POT
Connect a resistor
between these two
pins to set the trans-
impedance
Connect a resistor
between these two
pins to set the trans-
impedance
Connect a resistor
between these two
pins to set the trans-
impedance
To ADC
To ADC
To ADC
To ADC
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