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