Fiber Optics
Medium Power
BIDI
®
Optical Standard Module
1310 nm Emitting, 1310 nm Receiving
SBM52214x
Features
• Designed for application in passive-optical
networks
• Integrated Wavelength Division Multiplexer
(WDM) or Beam Splitter
• Bi-Directional Transmission in one optical window
• Single fiber solution
• FP-Laser Diode with Multi-Quantum Well structure
• Class 3B Laser Product
• Suitable for bit rates up to 1.25 Gbit/s
• Ternary Photodiode at rear mirror for monitoring and control of radiant power
• Low noise / high bandwidth PIN diode
• Hermetically sealed subcomponents, similar to TO 46
• With singlemode fiber pigtail
BIDI
®
is a registered trademark of Infineon Technologies
Data Sheet
1
2002-05-01
SBM52214x
Pin Configuration
Pin Configuration
Transmitter (bottom view)
2.54 mm
2
1
3
4
Pinning 1
(on request)
LD
1
4
2
3
MD
Pinning 2
(Standard)
1
2
LD
3
MD
4
Figure 1
Transmitter
Receiver (bottom view)
2.54 mm
Pinning 1
(Standard)
Pinning 1
3
1
2
3
2
1
2.54 mm
3
Pinning 2
(on request)
1
3
Pinning 2
2
1
2
Figure 2
Receiver
Available Pinnings
Type
SBM52214x
Transmitter
2 (Standard)
Receiver
1 (Standard)
Other Pinnings on request / different drawing set required for non standard pinning
Data Sheet
2
2002-05-01
SBM52214x
Description
Description
The Infineon module for bidirectional optical transmission has been designed for
different optical networks structures.
In the last few years the structure has changed from point to point planned for Broad
band ISDN to a point to multipoint passive optical network (PON) architecture for the
optical network in the subscriber loop.
A transceiver can be realized with discrete elements (Figure
3).
Transmitter and
receiver with pigtails are connected with a fiber-coupler (2:1 or 2:2, wavelength
independent or WDM).
Transmitter
Coupler
Receiver
2:1 or 2:2
3 dB wavelength independent
or wavelength division multiplexing
Figure 3
Realization with Discrete Elements
Infineon has realized this transceiver configuration in a compact module called a BIDI
®
(Figure
4).
This module is especially suitable for separating the opposing signals at the ends of a
link. It replaces a discrete solution with a transmitter, receiver and coupler.
The basic devices are a laser diode and a photodiode, each in a TO package, plus the
filter in the beam path. A lens in the TO laser concentrates the light and enables it to be
launched into the single-mode fiber of the module. In the same way the light from the
fiber is focused onto the small, light-sensitive area of the photodiode to produce a high
photo current. The mirror for coupling out the received signal is arranged in the beam so
that the transmitter and receiver are at right angles to each other. This means the
greatest possible degree of freedom in the layout of the electric circuit.
Data Sheet
3
2002-05-01
SBM52214x
Description
Beam Splitter
Glass Lens
TO-
Laser
Fiber
TO-Detector
Figure 4
Compact Realization of the Transceiver in One Module
A decisive advantage of the module is its use of standard TO components. These
devices, produced in large quantities, are hermetically sealed and tested before they are
built in. This makes a very substantial contribution to the excellent reliability of the
module. The solid metal package of the module serves the same purpose. It allows the
use of modern laser welding techniques for reliable fixing of the different elements and
the fiber holder.
Data Sheet
4
2002-05-01
SBM52214x
Technical Data
Technical Data
Absolute Maximum Ratings
Parameter
Module
Operating temperature range at case
Storage temperature range
Soldering temperature (
t
max
= 10 s,
2 mm distance from bottom edge of case)
Laser Diode
Direct forward current
Radiant power CW
Reverse Voltage
Monitor Diode
Reverse Voltage
Forward Current
Receiver Diode
Reverse Voltage
Forward Current
Optical power into the optical port
Symbol
Limit Values
min.
max.
85
85
260
°C
Unit
T
C
T
stg
T
S
–40
–40
I
F max
P
F, rad
V
R
V
R
I
F
V
R
I
F
P
port
120
2
2
10
2
10
2
1.5
mA
mW
V
V
mA
V
mA
mW
Data Sheet
5
2002-05-01
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