Data Sheet, Rev. 4
June 2001
A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Characteristics (continued)
Table 2. Additional Characteristics
Parameter
Symbol
Conditions
Min
Max
Unit
Bias Current1 (Operating Current)
Threshold Current
Slope Efficiency2
IB
ITH
η
BOL
—
—
120
30
mA
mA
25 °C, BOL
IP = ITH + 20 and
ITH + 60
0.10
—
mW/mA
Monitor Photocurrent
IMON
IOP = 0 mA, VRM = 5 V,
TOP = 25 °C
10
200
µA/mW
Operating Chip Temperature3
TEC Current
TOP
ITEC
IF = IOP
15
35
°C
A
–20 °C < TC < 65 °C,
TOP = 15 °C—35 °C,
IF = 60 mA
–1.5
1.5
TEC Voltage
VTEC
RTH
TOP = 15 °C—35 °C over TC
–2
9.5
40
30
2
10.5
—
V
Thermistor Resistance
Optical Return Loss
TOP = 25 °C
TC
kΩ
dB
dB
ORL
Side Mode Suppression Ratio
SMSR
IF = IOP
—
1. Bias point at which all specifications apply.
2. For 10 mW output power. Minimum slope efficiency is lower for lower power lasers.
3. Chip temperature at which wavelength specification is met. Operating chip temperature is reported for each laser.
Electrical Schematics
1
2
3
4
5
6
7
14
NC
ISOLATOR
13 (+)
(–)
12
(–)
(+)
(+)
(–)
11 (+)
10
9
NC
CASE
GROUND
8
CASE
GROUND
TEC
1-1233F
Figure 1. A1750A Laser Schematic
3
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
