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1319-Type High-Speed Lightwave Receiver

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1319-Type High-Speed Lightwave Receiver

Data Sheet

July 2000

Description

Receiver Operation

The 1319-Type high-speed fiber-optic receiver consists

of a wideband linear preamp followed by a limiting

amplifier buffer stage. It is designed for use in single-

mode, high-speed applications at the SONET OC-48

and the ITU-T synchronous digital hierarchy (SDH)

STM-16 data rate of 2488.32 Mbits/s. The receiver is

available with either a PIN photodetector or an APD

photodetector.

At 2.5 Gbits/s, the typical room temperature receiver

sensitivity measured at 3 x 10–11 bit-error rate is

–34 dBm for the APD receiver and –25 dBm for the PIN

version of the receiver. The operating case temperature

range for the APD receiver is 0 °C to 60 °C and

–40 °C to +85 °C for the PIN receiver.

The receiver is manufactured in a compact, 14-pin but-

terfly lead package with a single-mode optical fiber pig-

tail. The fiber in the 1319M-Type is internally beveled

for low optical return loss. The receivers are available

with the fiber pigtail terminated in FC-PC or SC optical

connectors.

The incoming light pulses are converted to electrical

current pulses by a high-performance APD or PIN

photodiode. The photodiode is coupled to a GaAs IC

preamplifier having differential data outputs. These

differential outputs are ac-coupled through 0.047 µF

capacitors to the package data output pins (see

Figure 2).

For the 1319M codes, the APD requires a positive high

voltage (~60 V) bias supply. The nominal 25 °C gain =

12 and gain = 4 bias voltages are supplied with each

receiver. In order to maintain constant APD gain over

the full operating temperature range, the high-voltage

bias supply should have a means to automatically

adjust the voltage output to match the 0.18%/°C gain

versus temperature coefficient of the APD. The 1319M

has an internal thermistor, with a nominal 25 °C resis-

tance of 3 kΩ, which can be used to monitor the

receiver operating temperature.

The 700B power module available from the Lucent

Technologies Microelectronics Group Power Systems

unit is a dc-dc converter that converts +5 Vdc to an

adjustable high voltage output in the range required for

the APD bias. The 700B uses the thermistor in the

1319M to provide a temperature-compensated output.

Contact your local Lucent Sales Office for pricing and

availability.

Single-Ended or Differential Data Outputs

Single-ended data output versions of both the 1319M-

Type APD receiver and the 1319P-Type PIN receiver

are available for drop-in replacements in designs

using the current 1319B, 1319C, or 1319H models.

In these single-ended data output receivers, pin 11

(see Figure 1) will not be connected internally.

For new designs, Lucent has versions of both the APD

receiver and the PIN receiver with differential data out-

puts.

Power Supplies

Printed-Wiring Board Layout

Both versions of the receiver require a single –5.2 V

power supply for the preamplifier IC. To obtain the high-

est overload capability, the PIN in the 1319P series

should be biased at 5 V. However, if a lower overload

response can be tolerated, then the PIN bias lead may

be connected to circuit ground. Biasing the PIN at 0 V

will reduce the maximum overload capability by approx-

imately 4 dB.

In devices with differential data outputs, due to internal

constraints, the path length to the DATA output is 25 ps

longer than the DATA path length at 2.5 Gbits/s. There-

fore, to ensure optimum performance, the DATA and

DATA signal traces on the application circuit board

should be adjusted accordingly.

2

Lucent Technologies Inc.

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