Fiber Optics
High Power
BIDI
®
Optical Standard Module
1310 nm Emitting, 1550 nm Receiving
SBH52444x-FSAN
Features
• Designed for application in passive-optical
networks according to FSAN, ITU-T G.983
• Suitable for ONU applications, 155 Mbit/s
downstream bitrate
• Integrated Wavelength Division
Multiplexer (WDM)
• Bi-Directional Transmission in 2nd and 3rd
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
2002-05-28
SBH52444x-FSAN
Pin Configuration
Pin Configuration
Transmitter (bottom view)
2.54 mm
2
1
3
4
Pinning 2
(Standard)
1
2
LD
3
MD
4
Figure 1
Transmitter
Receiver with Preamp (bottom view)
2.54 mm
2
1
3
4
Pinning
(Standard)
3
Out−
4 V
CC
Pin
Pre-
amp
2
1
Out+
Figure 2
Receiver with Preamp
Other Pinnings on request / different drawing set required for non standard pinning
Data Sheet
2
2002-05-28
SBH52444x-FSAN
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
2002-05-28
SBH52444x-FSAN
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
2002-05-28
SBH52444x-FSAN
FSAN Applications
FSAN Applications
The generation of a service-independent platform providing a high transport capacity
based on the existing infrastructure is the most important goal with respect to the
standardization of new systems for the access network. For FSAN (Full Service Access
Network) there have been several Working Groups working on a special system
configuration. The target of FSAN was to make a specification for:
•
•
•
•
Fiber To The Cabinet (FTTCab)
Fiber To The Curb (FTTC)
Fiber To The Building (FTTB)
Fiber To The Home (FTTH).
The FSAN Basic Network Structure is shown below.
The Common Access System
Switch
Node
PON Head
End Node
Local
Exchange
Cabinet
Curb
Home
OLT:
Optical Line Termination
ONU:
Optical Network Unit
ONT:
Optical Network Termination
ATM:
Asynchron Transfer Mode
SDH:
Synchronous Digital
Hierarchy
NTE:
Network Termination
UNI:
User Network Interface
ADSL:
Asymmetric Digital
Subscriber Line
VDSL:
Very High Speed Digital
Subscriber Line
SDH
ATM
ATM
ATM
ATM
OLT
OLT
OLT
OLT
PON
ONU
ONU
ADSL
VDSL
UNI
NTE
NTE
NTE
ONU
ONT
VDSL
FTTEx
FTTCab
FTTC/FTTB
FTTB/FTTH
ONU
Passive Optical Network
Figure 5
FSAN Basic Network Structure
Data Sheet
5
2002-05-28
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