ASOC®Dual-wavelength
Single-fibre Bi-directional
WDM Optical Transceivers
Bookham Technology offers a range of ASOC optical
transceivers that are designed for single-fibre networks,
for use in exposed locations such as street cabinets.
This product summary describes transceivers that are
suitable for point-to-point applications, including SDH
and PDH.
A low-noise AGC transimpedance amplifier and
decoupling capacitors are integrated into the package to
increase the sensitivity of the receiver. The differential
receiver outputs can be connected directly to a low-pass
filter and limiting amplifier.
For more detailed product information or price
enquiries, please contact your regional sales office
or e-mail sales@bookham.com
Features
■Uncooled operation from -40oC to +85oC
■Low threshold current Fabry-Perot lasers
■Data rates up to STM-1 (155 Mbit/s)
■Low profile 14-pin DIL package
■Wide dynamic range receiver amplifier
■Direct interface to limiting amplifier
■Designed to meet GR-468-CORE
Applications
■Access networks
■Duplex point-to-point links on a single fibre
■Fibre to the kerb (FTTK)
■Fibre to the cabinet (FTTC)
■Fibre to the business or office (FTTB/FTTO)
■15 km line extenders – single-fibre implementation for
G.957 SDH STM-1 Intra-office (I-1) and
Short-haul (S-1.1 and S-1.2) applications
■Link budget of 12+1dB at STM-1 (protected by 19dB
beginning of life test)
■G.981 PDH WDM links
■Extended link budgets for lower data rates such as
4xE1 CMI encoded channels
With Internal AGC Transimpedance Amplifier
For 12+1dB point-to-point links at STM-1
1310nm Transmit 1550nm Receive
1550nm Transmit 1310nm Receive
BKM-2420 Family
Optical Communication through Silicon
Fabry-Perot
laser diode
silicon-on-
insulator
substrate
monitor
photodiode
pig-tailed
fibre
silicon
waveguide
transimpedance
amplifier
receiver
photodiode
optical transmit/receive
at different wavelengths
Evaluation Boards
To test these transceivers for your application, an evaluation board is available.
Please contact your regional office for more details about the BKM-2958-V-03.
Transceiver Modules
Complete electronic modules are available to significantly shorten your product
development cycle by removing the time needed for analogue board design.
Contact your regional office for details.
Package Outline
Pin-Out Diagram
BKM-2425-A-21-FP or BKM-2426-A-21-FP
BKM-2425-A-21-SP or BKM-2426-A-21-SP
Termination Options Include:
FC/PC Connector
SC/PC Connector
Typical values: (-40oC to +85oC)
Transmit/receive wavelength
Mean power in fibre
Duplex sensitivity
Protected link budget at STM-1
Threshold current (Ith) @ 25oC
ASOC BKM-2420 Family Members
BKM-2425-A-21
1310/1550nm
-7dBm
-26dBm
12+1dB
7 mA
BKM-2426-A-21
1550/1310nm
-7dBm
-26dBm
12+1dB
13 mA
Dimensions in mm FM39955
ISO 9001
www.bookham.com
IMPORTANT NOTICE
Bookham Technology has a policy of
continuous improvement, as a result
certain parameters detailed on this
flyer may be subject to change
without notice. If you are interested
in a particular product please request
the product specification datasheet,
available from any Bookham
Technology sales representative.
REV. 5.0 AUG 2000
©Bookham Technology 2000
Bookham & ASOC are registered trademarks
of Bookham Technology plc
UK Headquarters
Bookham Technology plc
90 Milton Park
Abingdon, Oxfordshire
OX14 4RY UK
Tel: +44 1235 827200
Fax: +44 1235 827201
E-mail: sales@bookham.com
US
Bookham Technology Inc
8521 Six Forks Road
Suite 305, Raleigh
NC 27615 US
Tel: +1 919 870 6419
Fax: +1 919 870 6766
E-mail: raleigh@bookham.com
US
Bookham Technology Inc
2055 Gateway Place
Suite 400, San Jose
CA 95110 US
Tel: +1 408 451 3940
Fax: +1 408 441 9152
E-mail: sanjose@bookham.com
Japan
Bookham Technology KK
KSP W300C, 3-2-1 Sakado
Takatsu-ku, Kawasaki 213-0012
Japan
Tel: +81 44 850 8800
Fax: +81 44 850 8801
E-mail: kawasaki@bookham.com
France
Bookham Technology plc
Atria Paris-Charenton
5 Place des Marseillais,
94227 Charenton le Pont
Cedex, France
Tel: +33 1 4676 6017
Fax: +33 1 4676 6004
E-mail: paris@bookham.com
Viewed from above
Pin Name
1 Transmit ground
2 Monitor photodiode anode
3 Monitor photodiode cathode
4 Transmit ground
5 Laser diode cathode
6 Laser diode anode
7 Transmit ground
8 Receive data -
9 Receive data +
10 Receive voltage supply
11 Receive ground
12 Not connected*
13 Do not connect
14 Case
*For new applications, we recommend that photodiode bias should
be applied to pin 12. This will provide flexibility for future upgrade.
8 9 10 11 12 13 14
7654321
