DATA SHEET| JUNE 14, 2006
EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
200 km, 400 km, and 650 km reach
The EC48 series directly modulated external cavity laser is a cost
effective solution for 2.5 Gbits/s digital transmission up to 650 km in
SMF-28 fiber. The laser is fabricated in a 14-pin hermetically sealed
butterfly package that incorporates a bias tee circuit, an integrated
Applications
Metro and Long Haul DWDM,
100 GHz spaced networks
SONET/SDH OC-48/STM16 ring
and meshed applications
Drop-side of DWDM long-haul
transport equipment
CATV networks
Optical Test and
Instrumentation
Microwave Photonics
Sensors
Case Operating Temperature Range
Center Wavelength ( 100 GHz ITU Grid )
-15
1527
-
30
-
-
-
-
+75
1570
.10
-
°C
nm
nm
dB
Min
Optical Output Power
3
Typical
-
Max
-
Units
mW
thermoelectric cooler (TEC), a thermistor, and a back facet monitor
photodiode. The EC48 provides substantially lower dispersion penalty
and lower chirp than a directly modulated DFB. The wavelength stability
is assured by design, eliminating the need for wavelength lockers and
complex feedback control circuits.
Performance Highlights
Features
ITU wavelengths across C-
band
100 GHz channel spacing
SONET/SDH OC-48/STM16 ring
and meshed applications
Low dispersion provides up to
200-km, 400-km, and 650-km
reach in SMF-28 fiber
Low transient chirp provides
unique narrow dynamic
spectrum
Excellent long-term
wavelength stability eliminates
the need for a wavelength
locker
Spectral Width ( - 20 dB )
Optical Isolation
Side Mode Suppression Ratio
CW
Dynamic
High Frequency Cutoff
Extinction Ratio
EOL
BOL
8.5
9.5
-
10
-
-
dB
dB
35
30
3.5
-
-
-
-
-
-
dB
dB
GHz
See following pages for complete specifications and conditions.
For more information on this and other products:
Contact Sales at Ortel 626-293-3400, or visit www.emcore.com.
EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
Absolute Maximum Ratings
DATA SHEET| JUNE 14, 2006
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute 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.
Parameters
Storage Temperature
Operating case temperature
Forward Current
Reverse Voltage
Photodiode Forward Current
Photodiode Reverse Voltage
TEC current
TEC voltage
Fiber bend Radius
Tensile Strength fiber to case
Lead Soldering Time
Package mounting screw torque
Operating Humidity: non-condensing
Storage Humidity: non-condensing
(1)
(2)
(3)
(4)
Symbol
T
stg
T
c
I
LF
V
LR
I
DF
V
DR
I
TEC
V
TEC
R
F
t
sold
X
op
X
op
Condition/Notes
Non operating
Continuous
CW
Continuous
Continuous
Continuous
(2)
Continuous
MIN
-40
-15
MAX
85
75
100
2
2
10
1.8
3.5/3.3*
5
10
0.12
95
95
35
< 260°C
(3)
(4)
5
5
Unit
o
C
o
C
mA
V
mA
V
A
V
mm
N
sec
m* N
%
%
Absolute maximum data are limited to system design only; proper device performance is not guaranteed over rating listed above. Operation
beyond these maximum conditions may degrade device performance, lead to device failure, shorter lifetime, and will invalidate the device
warranty
o
TEC current should not exceed 2.0 A during turn on, and case temperature under any conditions should not change faster than 10 C / min
Soldering iron only; no reflow or dip soldering allowed.
See mounting recommendations below
* 400-km
ORTEL, A division of EMCORE
EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
Electrical/Optical Characteristics
Parameters
Peak Optical Output Power
Slope efficiency
Threshold Current
Forward Voltage
Monitor Current
Monitor photodiode tracking error
TEC set temperature
Center wavelength (100 GHz ITU grid)
Spectral Width (at -20dB)
Wavelength drift with case (-10 to 70 ºC)
temperature
Wavelength offset from DWDM ITU grid
Variation in Center Wavelength from ITU
grid over ambient temperature, EOL
Wavelength Temperature coefficient
Wavelength Current coefficient
Optical isolation
Relative Intensity Noise
Side Mode Suppression Ratio
CW
Dynamic
High frequency cutoff
Rise/Fall time (20 - 80%)
Input Impedance
Extinction Ratio
EOL
BOL
Power Penalty at OSNR = 29dB
Symbo
Conditions/Notes
l
P
peak
CW output power 3 mW
η
I
TH
V
F
I
MON
TE
T
s
λ
c
Δλ
ΔλΤ
c
MIN
3
0.064
_
DATA SHEET| JUNE 14, 2006
Typ
_
_
MAX
_
_
Unit
mW
mW/m
A
mA
V
mA
dB
ºC
nm
nm
pm
pm
nm
CW output power 3 mW
CW output power 3 mW
-10 < T
C
< +70 ºC
Specified for every laser
TEC temperature at the
recommended value Ts
2.5 Gbits/s, ER =10 dB;
(1)
TEC temperature at T
s
_
15
1.3
_
_
0.04
_
25
1.8
0.4
±0.5
35
1570
0.10
±30
±40
±0.08
17
1527
-
_
_
_
_
Δλ
offset
TEC temperature at Ts
-10 < T
C
< +70 ºC,
Δλ
T
<20 years at the rated
power
Δλ/ΔT
Ts ± 1 ºC
Δλ/ΔΙ
RIN
SMSR
-10 < T
C
< +70 ºC
CW, output power 3mW
CW, Pout >1 mW
2.5 Gbits/s NRZ, ER =9.5
dB
S
21
at -3 dB
2.5 Gbits/s; PRBS2
23
-1;
NRZ; ER
≥
9.5;
-10 < T
C
< +70 ºC;
(2)
_
_
15
1.5
30
30
2
- 135
pm/ºC
pm/mA
dB
dB/Hz
dB
dB
GHz
ps
Ω
dB
dB
dB
35
30
3.5
150
22
8.5
9.5
25
28
t
r
, t
f
Z
in
ER
10
2
(2), (3), (4)
(1):
Time-Averaged spectrum measured with Ando OSA, 10 pm resolution, 1 nm span.
(2):
Measured with 100 GHz DWDM MUX/DEMUX or comparable optical filters.
23
-11
(3):
650km SMF-28 fiber (Dispersion = 11700 ps/nm); 2.5 Gbits/s; PRBS = 2 -1, BER= 1x10 ; ER
≥
9.5 dB;
(4):
Power Penalty = [total power penalty at the end of the 650km link at OSNR = 29dB] – [Baseline penalty measured back-to-back at OSNR = 29dB]
ORTEL, A division of EMCORE
3
EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
Thermal Specifications
Parameters
TEC current
TEC voltage
TEC capacity
Thermistor Resistance
Thermistor Beta constant
Symbol
I
TEC
V
TEC
ΔT
R
th
β
Conditions/Notes
At T
S
, T
c
= 70
o
C
At T
S
, T
c
= 70
o
C
T
c
= 70
o
C
T
L
= 25
o
C
(1)
MIN
_
_
DATA SHEET| JUNE 14, 2006
Typ
-
_
_
MAX
1.5
3.0
_
55
9.5
10
3891
10.5
Unit
A
V
o
C
kΩ
K
(1)
: Additional information on Resistance vs. Temperature Multipliers available on request.
Fiber Pigtail Specifications
Parameters
Fiber Type
Mode field diameter
Cladding diameter
Outer diameter of buffer
Length of pigtail
Optical connector
Conditions/Notes
Single mode fiber Corning SMF-28
TM
MIN
9
123.5
-
1
Typ
10.4
125
900
-
MAX
11
126.5
-
-
Unit
m
m
m
m
(see ordering information)
ORTEL, A division of EMCORE
4
EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
Outline Drawing
DATA SHEET| JUNE 14, 2006
Pin Assignments
Pin No
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Functions
Thermistor
Thermistor
Laser DC bias Cathode (-)
Photodetector Anode (-)
Photodetector Cathode (+)
TEC (+)
TEC (-)
Not Connected
Case Ground
Case Ground
Laser Anode (+)
Laser RF Cathode (-)
Laser Anode (+)
Case Ground
ORTEL, A division of EMCORE
5
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