DFB-1310-4X-50SMF-XXX
ELECTRICAL-OPTICAL CHARACTERISTICS
Unless otherwise stated, all parameters are at T
CASE
= 25°C, T
RANGE, CASE
= -40 to 85°C, 2.488 Gbps, PRBS 2
31
-1
Parameter
Threshold Current
Operating Current
Modulation Current
Output Power
Test Conditions
T = 25°C
T = T
RANGE
T = 25°C
T = T
RANGE
T = 25°C
T = T
RANGE
I
F
= I
OP
Symbol
I
TH
I
OP
I
MOD
L
OP
η
Min.
Typ.
10
45
Max.
20
40
70
Units
mA
mA
mA
Notes
1
ER~4.5dB
ER~6.5dB
10km option, 2
30km option, 2
25
60
-4.0
+2.5
dBm
Slope Efficiency
T = 25°C, SMF
0.025
0.1
mW/mA
10km option
30km option
Extinction Ratio
LA (wiggle)
Wavelength
Spectral Width
Wavelength temperature
coefficient
Side Mode Suppression
Relative Intensity Noise
Modulation Bandwidth
Rise / Fall Time
Forward Voltage
Laser Resistance
Monitor Current
Tracking Error
Monitor Dark Current
Monitor Diode Capacitance
Optical Return Loss
T = T
RANGE
LA
T = 25°C
T = T
RANGE
T = T
RANGE
T = T
RANGE
I=I
OP
, 20dB ORL,
0.1<F<5.5GHz
I=I
OP
, T=T
RANGE
I=I
OP
, T = 25°C
6.0
9.0
1.5
dB
dB
nm
nm, rms
nm/°C
dB
3
4
λ
Δλ
Δλ/Δ
T
SMSR
RIN
20
S
21,3dB
Tr
Tf
1290
1330
1.0
0.1
30
-120
4
6
90
90
1
2
80
-1.25
5
1.3
12
800
1.25
100
10
12
dB/Hz
GHz
ps
V
Ohms
5
6
I=I
OP
, T=T
RANGE
I=I
OP
, T=T
RANGE
T = 25°C, I=I
OP
,
V
B
=-2.5V
T=T
RANGE
T=T
RANGE
, V
B
=-2.5V
V
B
=-2.5V
Vf
R
L
I
MON
TE
I
D
C
MON
ORL
7
μ
A
dB
nA
pF
dB
8
Notes:
1. Operating current is the average bias current required to meet the ER, rise/fall, and bandwidth specifications. The target
operating condition is 35 mA over threshold at high temperature, 30mA over threshold at RT.
2. Other output power range is possible per customer request.
3. TOSA would be capable of meeting other specifications when modulated over this ER range.
4. Maximum change in power as fiber is rotated by 360º.
5. Measured with an optical receiver with a 3.125 Gb/s filter
6. Rise and fall times are measured 20-80%
7. Resistance is measured between ITH + 10mA and ITH + 20mA
8. Tracking error is defined as the coupled power difference at Tmax or Tmin (relative to 25°C) where the back monitor current,
Imon, is held constant at the value found at 25°C at I=Iop.