A1750A DWDM Analog
Forward-Path or Return-Path Laser Module
Data Sheet, Rev. 4
June 2001
Electrical Schematics (continued)
14
1
2
3
4
5
6
7
THERMISTOR
NC
13
12
11
10
9
LASER
COMMON (+)
THERMISTOR
39 nH
0.01
3.3
µ
f
SEE
FIGURES
3A AND 3B
LASER
MODULATION (–)
dc LASER
BIAS
µ
H
200
Ω
LASER
COMMON (+)
MPD ANODE
CASE GROUND
SEE
FIGURE 4
1000 pf
NC
MPC CATHODE
TEC (+)
1000 pf
CASE
GROUND
µ
0.01 f
8
CASE
GROUND
TEC (–)
µ
0.01 f
1-1238F
Figure 2. A1750A Circuit Schematic
0.01 µf
C7
R1
37.5 Ω
SEE PIN 12,
FIGURE 2
3:5
2
SEE PIN 12,
FIGURE 2
T1*
3
R2
37.5 Ω
0.5 pF—2.5 pF
VSWR
1-1238F.b
Figure 3b. Resistive-Matched Configuration
1 pF—
5 pF
0.01 µf
0.01 µf
FREQUENCY
RESPONSE
1-1238a(F)
* T1 (75 Ω) 3:5.
Figure 3a. Impedance-Matched Configuration
4
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
