Data Sheet
January 2000
1340-Type Lightwave Receiver
signal amplification, data threshold detection, and
Description (continued)
PECL data outputs. The incoming optical signal is cou-
pled into the receiver through a 62.5 µm core multi-
mode fiber pigtail. The outer jacket diameter of the
pigtail is 900 µm. The receiver can be ordered with the
pigtail terminated in an FC/PC, SC, or ST ® optical con-
nector. Other connectors are available on special order.
See your Agere account representative for ordering
conditions and information.
The SONET/SDH versions of the receiver are fully
compliant with the latest issue of Telcordia Technolo-
gies GR-253- CORE and the most recent issues of ITU
recommendations G.957 and G.958. The 1340-Type
receiver requires only a single 5 V power supply for
operation. All versions of the receiver are characterized
for operation over the case operating range of –40 °C
to +85 °C at the appropriate data rate for each version.
The receiver has differential PECL data outputs and,
depending on the version selected, either differential
PECL link status flag or complementary CMOS link
status flag outputs. The link status flag outputs indicate
the presence or absence of a minimum acceptable
level of optical input signal.
Manufactured in a 20-pin DIP, the receivers use a pla-
nar, rear illuminated InGaAs PIN photodetector that
allows these receivers to be used at wavelengths from
1.1 µm to 1.6 µm. The photocurrent output of the PIN
detector is amplified and converted to a voltage by a
silicon amplifier. A silicon quantizer provides additional
VCC
FLAG
FLAG
FILTER
InGaAs
PIN
GaAs
PREAMPLIFIER
Si
COMPARATOR
FILTER
VPIN
DATA
DATA
1-414(F)
Figure 1. Block Diagram
2
Agere Systems Inc.
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