Optobahn Corporation/NGK Insulators 1/4
AP-011203A R0.0
Optobahn® Corporation
Multi-channel Interconnects
Features
• Reliability
• Hermetically Sealed Package
• 1310nm edge emitting laser
• ISO 9001 Manufactured Article
• Telcordia GR-468-CORE
• Performance
• Up to 2.67 Gb/s/channel
• 8 channel link and 4 channel TRx
• Single Mode and Multi Mode fiber
• 3.3V power supply
• 0°C~ 80°C Operating Temperature
• Typical BER <10-14
• Ease of Use
• Solder Reflowable (260°C, 30sec, 3
cycles)
• Standard MTP (MPO) Optical
Interface
• Class I FDA, Class 1 IEC Laser Safe
• Surface Mount Package
Applications
• Telecommunications
• Digital Cross Connects
• ATM Switching Systems
• Access Networks
• Data Communications
• High Speed Routers
• HIPPI-6400
• Rack to Rack
• Board to Board
MTP® is a registered trademark of US Conec Ltd.
Figure 1. Module Photo
Optobahn Corporation/NGK Insulators 2/4
AP-011203A R0.0
Our parallel optoelectronic links consist
of a transmitter, an 8 wide fiber ribbon cable
terminated with MTP(MPO) connectors and a
receiver. The optical link operates on a 3.3V
power supply. The link will operate over a
temperature range of 0 to 80°C case
temperatures. The data is straight through at data
rates of up to 2.67 Gb/s with no clock recovery
or data latching. We have both Single Mode
(SM) and Multi-mode (MM) versions available
depending on the desired link distances.
Our high performance ceramic package
offers us surface mount technology, solder reflow
compatible installation, and hermetic sealing.
These features make the Optobahn/NGK link
the easiest for installation and the most reliable
on the market.
We guarantee all links for a BER of
<10-12. Typical rates of 10-14 are achieved in
normal operation.
Board Assembly
This link is compatible with most
standard pick and place machines. It uses
surface mount solder reflowable packaging. The
entire modules will withstand temperatures up to
260 oC for up to 30s and 3 cycles. The part
comes with a protective plug to protect the
optical facet when no fiber is connected.
Transmitter
The transmitter converts electrical
signals to optical signals that pass over an 8
channel fiber ribbon as shown in Figure 1.
Figure 1. Transmitter Block Diagram
The transmitter consists of a custom
laser driver IC, an array of 1310nm InGaAsP/InP
MQW edge-emitting lasers, and a temperature
compensation circuit. See Figure 1 for a block
diagram. We are able to operate over the
temperature range from 0 to 80°C by monitoring
the temperature of the laser array and feeding
back to the laser driver chip.
The transmitter uses a monolithic array of
8 lasers, which makes automatic alignment
possible and cost effective. These lasers offer
unsurpassed reliability at a cost competitive with
other sources. See Tables 1 and 2 for the optical
specifications.
Under all operating conditions the
transmitter complies with regulations for a FDA
Class I laser product, and also IEC Class 1 laser
product.
Optically the transmitter operates with a
very tight power variation across the channels
and temperature range. A typical transmitter has
a variation within 3 dB over temperature and
channel.
Laser
Driver
Laser
Array
Thermistor
8
Inputs
8
Optical
Output
Optobahn Corporation/NGK Insulators 3/4
AP-011203A R0.0
Table 1. Laser Specifications
Parameter Min. Typ. Max.
Wavelength (nm) 1260 1310 1350
Operating Temp (oC) 0 - 85
Storage Temperature
(oC) -40 - 100
The use of edge emitting lasers enables
us to operate over longer distances than other
interconnects. It also allows us to transmit over
SM and MM fiber. We can transmit over
distances up to 300m in MM fiber and 2km (@
2.5 Gb/s) in SM fiber,
Table 2. Optical Specifications
Parameter Min. Typ. Max.
Fiber Type 62MM / SM
Optical Power /
Channel (dBm/Ch) - -10 -
Power Decrease till
end of life (dB) - - 3
Extinction Ratio (dB) - 5 -
Array Optical Power
Variation (dB) - - 3
Receiver
The receiver is made up of an array of PIN
photodiodes and a preamplifier and comparator
along with passive components.
The O/E conversion is done by an array of
InGaAs PIN photo-diodes. See Figure 2 for the
block diagram. The receiver takes in the optical
signals coming from the transmitter and converts
them into electrical data. Table 3 shows the
optical specifications.
Figure 2. Receiver Block Diagram
Table 3. Receiver Specifications
Parameter Min Typ Max.
Fiber Type 62MM / SM
Sensitivity (dBm) - -20 -
Saturation (dBm) - -6 -
Outputs
Pre-
Amplifier
PD
Array
8
Comparator
Optical
Input
8
Optobahn Corporation/NGK Insulators 4/4
AP-011203A R0.0
Contact Information:
Please contact our sales offices around the world for more information on these and other
Optobahn / NGK products.
Los Angeles
Headquarters
Wayne Ritchie
Tel: (310) 768-2900 x 205
Fax: (310) 768-2999
writchie@optobahn.com
San Jose
Tak Eguchi
Tel: (408) 522-2650 x 115
Fax: (408) 720-1985
teguchi@optobahn.com
New Jersey
Edward Peterson
Tel: (908) 791-9960
Fax: (908) 791-9966
epeterson@optobahn.com
Japan
NGK Insulators Ltd.
Yosuke Niwa
Tel: +81-3-5488-8991
Fax: +81-3-5488-8925
y-niwa@ngk.co.jp
