Data Sheet
January 2006
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Description
The E2561-series EMLs are designed for 10 Gb/s
DWDM or TDM transmission applications. The EML
integrates a CW laser with an electroabsorption modu-
lator in the same semiconductor chip. These devices
can replace external modulators that are often bulkier,
more expensive, and require more drive electronics
than the EML. The 10 Gb/s EML uses a GPO
TM
-type
connector to handle the RF signal. The package also
contains a thermoelectric cooler (TEC), thermistor,
rear-facet monitor photodiode, and an optical isolator.
The nominal input impedance of the 10 Gb/s EML is
50
Ω.
The package is qualified to the
Telcordia Tech-
nologies
™ TA-TSY-000468 standard.
Features
n
n
n
n
n
n
n
n
Integrated electroabsorption modulator
1.5
µm
wavelength, full C-band
Characterized for 10 Gb/s operation
For use up to 80 km at 10 Gb/s
Low modulation voltage
Temperature stabilized
Wavelength selectable to ITU-T standards
Ultrastable wavelength aging for DWDM
The EML is available in the full range of C-band
ITU-T wavelengths for use in DWDM systems operat-
ing at 10 Gb/s per channel. The device exhibits excel-
lent wavelength stability, supporting operation at
100 GHz channel spacing over 20 years
(assuming an
end-of-life aging condition of <±100 pm).
Typically,
external wavelength stabilization is not required in sys-
tems of this type, using CyOptics’ EML products. The
package also offers excellent stability of wavelength vs.
case temperature, with a maximum coefficient of
±0.5 pm/°C.
Applications
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SONET/SDH applications
Ultrahigh capacity WDM system application
High-speed data communication
Digitized video
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Data Sheet
January 2006
Module Characteristics
Table 1. Module Characteristics
Parameter
Package Type
Fiber
Fiber Length
Optical Connector
RF Input (SMP-type connector)
Bit Rate
Description
E2561: 7-pin package with GPO
TM
-type connector RF input.
Standard single-mode fiber.
32.7 inches minimum.
See Table 6 (additional connector types available on request).
Impedance 50
Ω (exterior
of RF connector is connected to case).
up to12.5 Gb/s.
Pin Information
Table 2. Pin Descriptions
Pin Number
1
2
3
4
5
6
7
Pin Name
THERM
THERM
LASER+
BACK DET–
BACK DET+
TEC+
TEC–
Description
Thermistor
Thermistor
Laser anode*
Monitor anode (–)
Monitor cathode (+)
Thermoelectric cooler (+)
Thermoelectric cooler (–)
* Laser cathode and modulator ground are connected to case.
Target Specifications
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Table 3. Absolute Maximum Ratings
Parameter
Laser Diode Reverse Voltage
Laser Diode Forward Current
Optical Output Power
Modulator Reverse Voltage
Modulator Forward Voltage
Monitor Diode Reverse Voltage
Monitor Diode Forward Voltage
Storage Temperature Range
Operating Temperature Range
Package Thermistor Temperature
Thermo-Electric Cooler in Heating Mode**
** To prevent package over temperature conditions.
Conditions
CW
CW
CW
—
—
—
—
—
—
—
—
Min
—
—
—
—
—
—
—
–40
–10
Max
2
150
10
3.5
1
10
1
85
70
100
0.5
Unit
V
mA
mW
V
V
V
V
°C
°C
°C
Α
2
For additional information and latest specifications, see our website:
www.cyoptics.com
Data Sheet
January 2006
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Target Specifications
(continued)
Characteristics
Minimum and maximum values specified over operating case temperature range. Typical values are measured at
room temperature (25°C) unless otherwise noted.
Table 4. Optical and Electrical Specifications
(Chip operating temp. = 15
°C
to 35
°C,
except where noted.)
Parameter
Threshold Current (BOL)
Forward Voltage
Operating Current
Threshold Power
Fiber Output Power (average)
Peak Wavelength
(Wavelength can be specified to
the ITU-T wavelength channels.)
Side-mode Suppression Ratio
Modulator Voltage
Onstate Voltage
Modulator/Driver
RF Extinction Ratio
RF Return Loss
(130 MHz to 10 GHz)
–3 dB Bandwidth
Rise/Fall Time (20%—80%)
Dispersion Penalty
Monitor Diode
Monitor Current
Dark Current
Capacitance
Thermistor
Resistance
Thermistor Current
Thermistor B Constant
Thermoelectric Cooler (TEC)
TEC Current
TEC Voltage
TEC Power
TEC Capacity
Optical Isolation
Optical Isolation
Package
Wavelength vs. Case Temperature
Symbol
I
TH
V
F
I
OP
P
TH
P
AVG
λ
PK
SMSR
V
PP
V
ON
ER
RF
S
11
BW
t
R
/t
F
DP
Conditions
—
I
F
= I
OP
@
T
OP
—
I
F
= I
TH
V
M
*= 0V
Note 1
Note 1
V
M
= 0V, I
F
= I
OP
, T
OP
—
—
Notes 1
V
M
= –0.8V, I
F
= I
OP
V
M
= –0.8V, I
F
= I
OP
Note 4
1600 ps/nm, BER = 10
–10
Notes 1, 2
V
BD
= 5 V, I
F
= I
OP
V
BD
= 5 V
V
BD
= 5 V, F = 1 MHz
T = 25
°C
—
—
Note 3
Min
5
—
50
—
–2
1528
35
1.5
–1.1
10
Max
35
2.2
100
80
—
1564
—
2.5
0
—
-10
—
30
2.0
Unit
mA
V
mA
µW
dBm
nm
dB
V
V
dB
dB
GHz
ps
dB
µA
µA
pF
kΩ
µA
—
A
V
W
C
dB
pm/°C
11
—
—
I
BD
I
D
C
R
THERM
I
TC
B
I
TEC
V
TEC
P
TEC
∆T
—
dλ/dT
40
—
—
9.8
10
3700
—
—
—
1100
0.1
25
10.2
100
4100
1.3
2.6
3.4
55
—
0.5
Note 3
T
CASE
= –10
°C
to +70
°C
30
–0.5
* V
M
= Modulator Voltage (DC).
1. Modulated for 80 km (1600ps/nm) operation. Modulated operational values are defined to be I = I
OP
, T = T
OP
, at all specified operating
conditions, 9.95328 Gb/s modulation, 2
31
– 1 PRBS
(operating parameters: I
op
, T
op
, V
on
for 80 km will be provided).
Laser diode tempera-
ture can be set in a 15
°C
to 35
°C
range to take advantage of wavelength tuning, provided that it will meet all other specs at this preset tem-
perature.
V
M
= modulator voltage.
2. Over 1600 ps/nm (80 km)
.
3. T
CASE
= 70
°C,
T
op
(
LASERCHIP)
= 15
°C
to 35
°C.
4. Without filter, O/E bandwidth > 20GHz.
For additional information and latest specifications, see our website:
www.cyoptics.com
3
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Data Sheet
January 2006
Outline Diagram
.Dimensions are in inches and (millimeters).
0.215
(5.46)
0.291
(7.38)
0.010
±
0.002
(0.25
±
0.064)
0.020
(0.51)
0.100
(2.54)
LEAD 7
0.500
(12.7)
MIN.
LEAD 1
TRADEMARK, CODE, LASER SERIAL NUMBER
AND DATE CODE LABEL IN AREA SHOWN
BEND LIMITER
0.500
(12.7)
0.350
(8.89)
0.200
(5.08)
0.330
(8.37)
0.190
(4.82)
0.164
(4.17)
1.025
(26.04)
0.498
(12.64)
0.078
(1.98)
∅
0.106
(2.7)
4 PLACES
2.03
(51.60)
0.180
(4.56)
0.820
(20.83)
32.7
(830.6)
MIN.
0.98
(2.5)
0.260
(6.6)
0.365
(9.27)
0.56
(1.42)
1.180
(29.97)
0.030
(0.75)
0.228
(5.78)
0.215
(5.47)
CONNECTOR TYPE
AS SPECIFIED
4
For additional information and latest specifications, see our website:
www.cyoptics.com
Data Sheet
January 2006
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Laser Safety Information
Class IIIb Laser Product
FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser
Safety requirements. All versions are classified Class 3R laser products consistent with
IEC
®
60825-1: 1993. This
device family has been classified with the FDA under accession number 8720010. Measurements were made to
classify the product per
IEC60825-1:
1993.
This product complies with 21 CFR 1040.10 and 1040.11.
8.8/125
µm
single-mode fiber pigtail and connector.
Wavelength = 1.5
µm
Maximum power = 10 mW.
Because of size constraints, laser safety labeling (including an FDA Class IIIb label) is not affixed to the module
but attached to the outside of the shipping carton.
Product is not shipped with power supply.
Caution: Use of controls, adjustments, and procedures other than those specified herein may result in
hazardous laser radiation exposure.
DANGER
INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE TO BEAM
Wavelength: 1.5
µm
Max. Output: 10 mW,
Class IIIb Laser Product
DANGER
INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR
Avoid direct exposure to beam
Do not view beam directly with
optical instruments
INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR
Avoid exposure to beam
Class 3R Laser Product
Max. Output: 10 mW
Wavelength: 1.5
µm
Electrostatic Discharge
CAUTION: This device is susceptible to damage as a result of electrostatic discharge. Take proper precau-
tions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-A
(Dec. 1988).
CyOptics employs a human-body model (HBM) for ESD-susceptibility testing and protection-design evaluation.
ESD voltage thresholds are dependent on the critical parameters used to define the model. A standard HBM
(resistance = 1.5 kΩ, capacitance = 100 pF) is widely used and can be used for comparison purposes.
For additional information and latest specifications, see our website:
www.cyoptics.com
5
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