EC-48 2.5 Gbit/s External Cavity Directly
Modulated Lasers
DATA SHEET| JUNE 14, 2006
Electrical/Optical Characteristics
Parameters
Symbo
l
Ppeak
Conditions/Notes
MIN
Typ
MAX
Unit
_
_
_
_
Peak Optical Output Power
Slope efficiency
3
mW
mW/m
A
mA
V
CW output power 3 mW
0.064
η
_
_
Threshold Current
ITH
15
25
1.8
Forward Voltage
VF CW output power 3 mW
IMON CW output power 3 mW
1.3
_
Monitor Current
0.04
_
0.4
mA
dB
_
Monitor photodiode tracking error
TE
Ts
-10 < TC < +70 ºC
±0.5
TEC set temperature
Specified for every laser
17
35
ºC
_
Center wavelength (100 GHz ITU grid)
TEC temperature at the
recommended value Ts
2.5 Gbits/s, ER =10 dB; (1)
1527
1570
nm
λc
-
_
_
Spectral Width (at -20dB)
0.10
±30
nm
pm
Δλ
ΔλΤc
_
Wavelength drift with case (-10 to 70 ºC)
temperature
Wavelength offset from DWDM ITU grid
TEC temperature at Ts
_
_
TEC temperature at Ts
±40
pm
nm
Δλoffset
ΔλT
Variation in Center Wavelength from ITU
grid over ambient temperature, EOL
-10 < TC < +70 ºC,
<20 years at the rated
power
±0.08
Wavelength Temperature coefficient
Wavelength Current coefficient
Ts ± 1 ºC
15
30
2
pm/ºC
pm/mA
dB
Δλ/ΔT
1.5
Δλ/ΔΙ
Optical isolation
Relative Intensity Noise
Side Mode Suppression Ratio
CW
-10 < TC < +70 ºC
RIN CW, output power 3mW
SMSR
30
- 135 dB/Hz
CW, Pout >1 mW
2.5 Gbits/s NRZ, ER =9.5
dB
35
30
dB
dB
Dynamic
High frequency cutoff
S21 at -3 dB
3.5
GHz
Rise/Fall time (20 - 80%)
tr, tf
Zin
2.5 Gbits/s; PRBS223-1;
150
28
ps
NRZ; ER ≥ 9.5;
Input Impedance
22
25
10
Ω
Extinction Ratio
ER -10 < TC < +70 ºC; (2)
EOL
BOL
8.5
9.5
dB
dB
dB
Power Penalty at OSNR = 29dB
(2), (3), (4)
2
(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.
(3): 650km SMF-28 fiber (Dispersion = 11700 ps/nm); 2.5 Gbits/s; PRBS = 223-1, BER= 1x10-11 ; 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]
3
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