COMMUNICATIONS COMPONENTS
Key Features • Bias-free operation for fast transmitter development and
manufacturing
• Built-in 20 dB variable optical attenuator
• Single package for less splicing, lower overall insertion
loss and more usable board space
• 1535 to 1565 nm operation; L-band versions available
• Low drive voltage; compatible with commercial drivers
• Low chirp for maximum transmission distance (>1000 km)
• Voltage-controlled lithium niobate attenuator provides
proven high reliability
The 2.5 Gb/s bias-free modulator with integral attenuator combines a modulator
and a 20 dB variable attenuator within one small-outline package, simplifying
component count and fiber splicing. The bias point of the interferometer is set to
operate at about the half-intensity point (quadrature). A bias control circuit is not
required. The attenuator is based on proven integrated optical waveguide
technology, making it highly reliable. The modulator provides superior signal
quality over a wide range of wavelengths in the C and L bands, and can be used to
modulate tunable lasers. These devices are used for 2.5 Gb/s modulation and
dynamic power leveling in dense wavelength division multiplexing (DWDM)
systems.
Applications
• Medium- and long-haul DWDM
transmission requiring dynamic
optical power leveling
• Transmitters with limite component
space
2.5 Gb/s Bias-Free Modulator with Integral Attenuator
NORTH AMERICA:800 498-JDSU (5378) WEBSITE:www.jdsu.comWORLDWIDE:+800 5378-JDSU
2
2.5 GB/S BIAS-FREE MODULATOR WITH INTEGRAL ATTENUATOR
Dimensions Diagram
Typical Performance Characteristics
(Specifications in inches [mm] unless otherwise noted.)
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
-12
-10
-8
-6
-4
-2
0
S21 (dB)
Typical Frequency Response Curve, S21
0.00.51.01.52.02.53.0
Frequency (GHz)
S11 (dB)
Typical Return Loss Curve, S11
0.00
-2.50
-5.00
-7.50
-10.00
-12.50
-15.00
-17.50
-20.00
IN
MZ1 INP
UT
OUT
0
VD
C
MA
X
+24
db
m MA
X
MZ2 INP
UT
DATE
DC
BIA
S
INP
UT
ATTEN
AT
S/
N XXX
X
M
O
DEL N
U
MBE
R
.287
[
7.30
]
3
.047
[
77.39
]
.157
[
3.99
]
(
2
)
PLC
S
(
2
)
PLC
S
.09
[
2.2
]
.77 [19.7]
(
2
)
PLC
S
.200
[
5.08
]
(6) PLCS
5
.
2
±
.2
[
131.
4
±
5.1
]
.30
[
7.6
]
.433
[
11.00
]
.149
[
3.78
]
(
2
)
PLC
S
.500
[
12.70
]
.655
[
16.64
]
.855
[
21.72
]
1.947
[
49.44
]
2.047
[
51.98
]
2.147
[
54.52
]
2.300
[
58.42
]
3.622
[
92.01
]
.143
[
3.63
]
B
O
TT
O
M
O
F PIN
S
(
6
)
PLC
S
.15
[
3.7
]
.19
[
4.9
]
.15
[
3.7
]
.30
[
7.6
]
.060
[
1.52
]
(
2
)
PLC
S
39
.
4
±
2.
0
[
100
0
±
50
]
7
.9
[
200
]
39
.
4
±
2.
0
[
100
0
±
50
]
7.9
[
200
]
T
O
P VIEW
FRONT VIEW
RI
G
HT
S
IDE VIEW
LEFT
S
IDE VIEW
1
00
2
0
2
89
"X
"
"X" DEN
O
TE
S
REV LETTE
R
PIN DIA .
0
2
0
(
2
)
PLC
S
PIN DIA .
0
1
2
PIN DIA .
0
1
2
PIN DIA .
0
2
0
(
2
)
PLC
S
MINIM
UM
BARE FIBER
MINIM
UM
BARE FIBER
3
2.5 GB/S BIAS-FREE MODULATOR WITH INTEGRAL ATTENUATOR
Specifications
Parameter Specification
General
Material Lithium niobate
Crystal orientation x-cut, y-propagating
Waveguide process APE/titanium-indiffused
Optical
Operating wavelength 1535 to 1565 nm
Insertion loss, no connectors (note2)≤6.5 dB
On/off extinction ratio, low frequency ≥20 dB
Optical return loss ≥50 dB
Electrical
RF port
Drive voltage, V peak-to-peak, at 2.5 Gb/s PRBS (note3) 3.6 V typical
Vπat 100 kHz (note3) ≤3.7 V
S21 electro-optic bandwidth (-3 dBe) (note1, 3)≥2.5 GHz
S11 return loss
0.03 to 2.5 GHz (note3) ≤-9.5 dB
RF input power ≤24 dBm
Chirp, alpha parameter |α|<0.2
Attenuator port
Vπat DC ≤5.0 V
Impedance ≥1 MΩ
Mechanical
Input Fujikura SM-15-P-8/125-UV/UV-400
Output (note4) SMF-28
RF connection Pins
Bias connection Pins
Environmental
Operating temperature 0 to 65 °C
Storage temperature -40 to 85 °C
1. Relative to 30 MHz.
2. Insertion loss is measured at the maximum of the modulator’s transfer function and does not include the 3 dB loss incurred when operating at quadrature.
3. Variances with temperature and wavelength included.
4. PM output fiber also available.
NORTH AMERICA:800 498-JDSU (5378) WEBSITE:www.jdsu.comWORLDWIDE:+800 5378-JDSU
SMF-28 and Fujikura SM-15-P-8/125-UV-400 are registered trademarks of Corning Incorporated.
All statements, technical information and recommendations related to the products herein are based upon information believed to be
reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and no responsibility is assumed for any
inaccuracies. The user assumes all risks and liability whatsoever in connection with the use of a product or its application. JDSU reserves
the right to change at any time without notice the design, specifications, function, fit or form of its products described herein, including
withdrawal at any time of a product offered for sale herein. JDSU makes no representations that the products
herein are free from any intellectual property claims of others. Please contact JDSU for more information. JDSU and the JDSU logo are
trademarks of JDS Uniphase Corporation. Other trademarks are the property of their respective holders. ©2006 JDS Uniphase
Corporation. All rights reserved. 10116236 Rev. 001 05/06 25GBFMVOA.DS.CC.AE
Ordering Information
For more information on this or other products and their availability, please contact your local JDSU account manager or
JDSU directly at 1-800-498-JDSU (5378) in North America and +800-5378-JDSU worldwide or via e-mail at
customer.service@jdsu.com.
2.5 GB/S BIAS-FREE MODULATOR WITH INTEGRAL ATTENUATOR
Sample: 10021970
Product Code Description
10021970 2.5 Gb/s modulator with integral attenuator and no optical connectors
10021971 2.5 Gb/s modulator with integral attenuator and FC/SPC optical connectors
Note: Other connectors available upon special request. Call JDSU for more information.