afct-5943z Avago Technologies, afct-5943z Datasheet - Page 3

• Manufacturer Part Number: afct-5943z
• Description: Single Mode Sff Transceivers For Sonet Oc-48/sdh Stm-16 Multirate Operation
• Manufacturer: Avago Technologies

Functional Description
Transmitter Section
Design
A schematic diagram for the transmitter is shown in
Figure 2. The AFCT-5943LZ/ALZ/GZ/AGZ incorporates
an FP laser and has been designed to be compliant with
IEC 825 eye safety requirements under any single fault
condition and CDRH under normal operating condi-
tions. The optical output is controlled by a custom IC
that detects the laser output via the monitor photodi-
ode. This IC provides both dc and ac current drive to
the laser to ensure correct modulation, eye diagram
and extinction ratio over temperature, supply voltage
and operating life.
Figure 2. Simplified Transmitter Schematic
3
DATA
DATA
INPUT
PECL
MODULATOR
LASER
CONTROL
DRIVER
LASER
LASER
LASER
BIAS
BIAS
FP
(rear facet monitor)
PHOTODIODE