2.5 Gb/s Bias Free
Modulator
Butterfly Package
Product Bulletin
The 2.5 Gb/s bias free modulator is a digital device
in which the bias point of the interferometer is set
to operate at about the half-intensity point
(quadrature). A bias control circuit is not required.
This feature simplifies circuit design and speeds
product development. This device provides
superior signal quality over a wide range of
wavelengths in the C and L-bands and can be used
to modulate tunable lasers . The modulator is
designed for medium and long haul transmission
in DWDM and TDM systems.
Key Features
•Bias free operation for fast transmitter develop-
ment and manufacturing
•Small outline package
•1535 nm to 1565 nm operation, “L ” band versions
available
•Low drive voltage, compatible with commercial
drivers
•Low chirp for maximum transmission distance
(> 1000 km)
Applications
•Medium and long haul transmission
•DWDM and TDM transmission
Compliance
•T elcordia 468
-20.00
-17.50
-15.00
-12.50
-10.00
-7.50
-5.00
-2.50
0.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency, GHz
dB
2.5 Gb/s Bias Free Modulator | 2
T ypical F r equency Response Curve, S21 T ypical Return Loss C urve, S11
Measured ER = 18.7 dB
Driver: NEL C19401 Measured ER = 19 dB
Driver: Veritech VM 2.5EMD-422
-12
-10
-8
-6
-4
-2
0
0 0.5 1 1.5 2 2.5 3
Frequency (GHz)
S21 (dB)
2.5 Gb/s Bias Free Modulator | 3
2.5 Gb/s Bias Free Modulator Performance Specifications
General
Material LiNbO3
Crystal orientation x-cut, y-propagating
Electrical connectors (package) solderable pins
Fiber types PM input: Fujikura SM 15-P-8/125-UV/UV-400
SM output: Corning SMF 28
Cabling length, no connectors 1000 ± 50 mm
Fiber length, no connectors 200 mm minimum longer than the cabling
Fiber length, with connectors 1000 ± 50 mm, to tip of connector ferrule
Cabling type 900 µm diameter loose tube
Input fiber launch axis slow (parallel to the stress rods)
Absolute
Input optical power, maximum 200 mW
Operating temperature 0°C minimum, 65° C maximum
Storage temperature -40°C minimum, 85°C maximum
Optical
Operating Wavelength (nm) 1535 to 1565
Insertion loss, typ (dB) 3 .5
Insertion loss, no connectors, max (dB) 4 . 5
Insertion loss, with connectors, max (dB) 4 .8
On/off extinction ratio (<100 kHz), min (dB) >20
On/off extinction ratio at 2.5 Gb/s, typ (dB)2,3 >15.0
On/off extinction ratio at 2.5 Gb/s, min (dB)2,3 >14.0
Optical return loss (dB) >50
Electrical, all RF/data electrode
Maximum power, continuous (dBm) 2 4
Low Freq. VX (<100 kHz), max (V ) 3 .7
Drive voltage, Vpeak-to-peak, typ ( V )1,2,3,4 3.6
DC impedance, min (Ω)28
DC impedance, max (Ω)32
Rise time, max (ps)2120
Fall time, max (ps)2120
S21 Bandwidth, -3 dB (GHz) >2.5
S11, 30 kHz to 2.5 GHz, (dB) < -9.5
Notes:
1. Bias free devices are intended to work with 0v DC on the RF/Data electrodes.
2. Value dependent on driver ckt design and/or measurement conditions. Consult JDS Uniphase Application Eng. for more information.
3. Max extinction ratio using 223-1 Pseudo-Random Bit Sequence (PRBS).
4. Voltage measured using high-impedance probe at RF/Data input.
Ordering information
Indicate your requirements by selecting one option from each configuration table. For more information on this or other
products and their availability , please contact your local JDS Uniphase sales r epresentative or JDS Uniphase directly at
860 769-3000, or by fax 860 769-3001, or via email at sales.ct@us.jdsunph.com, or visit our Web site at www.jdsunph.com.
Sample: 25150-002280
XXXX model
2280 2.5 Gb/s Modulator with no optical connectors
2281 2.5 Gb/s Modulator with FC/SPC optical connectors
Note: Other connectors available upon special request.
Call us for more information.
25150-00XXXX
2.5 Gb/s Bias Free Modulator |
All information contained herein is believed to be accurate and is subject to change without notice. No responsibility
is assumed for its use. JDS Uniphase Corporation, its subsidiaries and affiliates, or manufacturer, r eserve the right
to make changes, without notice, to product design, product components, and product manufacuring metho ds.
Some specific combinations of options may not be available. Please contact JDS Uniphase for more information.
©JDS Uniphase Corporation. All rights reserved. 2.5GBMODBF_butterfly Rev. A 11/99 Printed in USA
JDS Uniphase Corporation Tel 860 769-3000
1289 Blue Hills Avenue Fax 860 769-3001
Bloomfield, Connecticut sales.ct@us.jdsunph.com
06002 USA www.jdsunph.com
European Sales
GCA House/Building #16 Tel +44 1993 601 601
Thorney Leys Business Park Fax +44 1993 700 444
Witney, Oxon OX8 7GE
United Kingdom
Package Dimensions
4
