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Data Sheet
March 2003
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
TriQuint10 GbO/PsTLOaE2Ls5Ce6Tr1RMONoIdCSu,lIeNC®.
Features
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
Applications
SONET/SDH applications
Ultrahigh capacity WDM system application
High-speed data communication
Digitized video
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 an SMP-type,
subminiature, push-on connector to handle the RF sig-
nal. 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 . The package is qualified to the Telcordia Tech-
nologies ™ TA-TSY-000468 standard.
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 TriQuint's EML products. The
package also offers excellent stability of wavelength vs.
case temperature, with a maximum coefficient of
±0.5 pm/°C.

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E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Data Sheet
March 2003
Module Characteristics
www.DataSheet4U.com
Table 1. Module Characteristics
Parameter
Package Type
Fiber
Fiber Length
Connector
RF Input
Description
E2561: 7-pin package with SMP-type connector RF input.
Standard single-mode fiber.
32.7 inches minimum.
See Table 6 (additional connector types available on request).
Impedance 50 Ω.
Pin Information
Table 2. Pin Descriptions
Pin Number
1
2
3
4
5
6
7
Pin Name
THERM, LASER–, CASE
THERM
LASER+
BACK DET–
BACK DET+
TEC+
TEC–
Description
Combined thermistor/laser cathode/case
Thermistor
Laser anode
Monitor anode (–)
Monitor cathode (+)
Thermoelectric cooler (+)
Thermoelectric cooler (–)
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
Conditions
CW
CW
CW
Min
–40
–5
Max
2
150
10
3.5
1
10
1
85
70
Unit
V
mA
mW
V
V
V
V
°C
°C
2 For additional information and latest specifications, see our website: www.triquint.com

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Data Sheet
March 2003
E2561-Series 10 Gb/s EML Modules
for up to 80 km Transmission
Target Specifications (continued)
www.DataSheet4U.com
Characteristics
Minimum and maximum values specified over operating case temperature range. Typical values are measured at
room temperature 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
ITH
VF
IOP
PTH
PAVG
λPK
SMSR
VPP
VON
ERRF
S11
BW
tR/tF
DP
IBD
ID
C
RTHERM
ITC
B
ITEC
VTEC
PTEC
T
dλ/dT
Conditions
IF = IOP @ TOP
IF = ITH
VM = 0 V
Note 1
Note 1
VM = 0 V, IF = IOP, TOP
Notes 1, 4
VM = –1 V, IF = IOP
VM = –1 V, IF = IOP
Note 5
1600 ps/nm, BER = 10–10
Notes 1, 2
VBD = 5 V, IF = IOP
VBD = 5 V
VBD = 5 V, F = 1 MHz
T = 25 °C
Note 3
Note 3
TCASE = –10 °C to +70 °C
Min Max Unit
5 35 mA
— 2.2 V
50 100 mA
— 80 µW
–2 — dBm
1528.7 1563.9 nm
35
1.5
–1.0
10
11
— dB
2.5 V
0V
— dB
-10 dB
— GHz
30 ps
2.0 dB
40
9.8
10
3700
55
30
–0.5
1100
0.1
25
µA
µA
pF
10.2
100
4100
k
µA
1.1 A
2.6 V
2.9 W
—C
— dB
0.5 pm/°C
1. Modulated for 80 km (1600ps/nm) operation. Modulated operational values are defined to be I = IOP, T = TOP, at all specified operating
conditions, 9.95328 Gb/s modulation, 231 – 1 PRBS (operating parameters for 80 km will be provided). Laser diode temperature 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 temperature.
VM = modulator voltage.
2. Over 1600 ps/nm (80 km).
3. TCASE = 70 °C, TLASERCHIP = 15 °C to 35 °C.
4. With fourth-order Bessel-Thomson filter.
5. Without filter.
For additional information and latest specifications, see our website: www.triquint.com
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