Model 1935R O-Band CWDM Coaxial DFB
Return Path Laser Diode
DATASHEET| JUNE 15, 2008
Electrical/Optical Characteristics
Parameters
Optical Output Power
Symbol
Conditions/Notes
Min
Typ
Max
Unit
3 dBm version
5 dBm version
6 dBm version
3
5
6
-
-
-
4.8
5.8
8.0
PO
dBm
Tcase = 25ºC
Tcase = 45ºC
-
-
8
13
15
20
Threshold Current
ITH
mA
Laser Bias Current
Forward Voltage
Laser Input Impedance
MPD Current
IOP
VF
Z
-
Iop
-
-
-
2
-
1.0
4
80
1.8
8
mA
V
Ω
IMPD
VMPD = 5V, Iop = 40 mA
200
-
2000
µA
VMPD = 5V, Iop = 0
Tcase = 25ºC
MPD Dark Current
ID
-
-
50
nA
1267
1271
1275
1287
1307
1327
1347
1367
1291
1311
1331
1351
1371
1295
1315
1335
Iop
O-Band CWDM Center Wavelength
nm
λc
Tcase = 25ºC
1355
1375
CW, Iop,
5 MHz < f < 200 MHz
Relative Intensity Noise
RIN
-
-155
-145 dB/Hz
Optical Isolation
Spectral Width (-20 dB)
Side Mode Suppression Ratio
ISO
∆λ
SMSR
Tcase = 25ºC
op, Tcase = 25ºC
Iop. Tcase = 25ºC
30
-
30
-
-
1.0
-
dB
nm
dB
I
0.1
45
IMON = const
Tracking Error
ER
-1
-
-
+1
-
dB
dB
ER = 10log(PO/2.0) [dB]
Optical Return Loss
ORL
Tcase = 25ºC
35
RF Characteristics
Parameters
Frequency Response Flatness 1
Response Up-tilt 1
Symbol
|S21|
Conditions/Notes
5 MHz < f < 200 MHz
5 MHz < f < 200 MHz
Min
-
0
Typ
-
Max
1
2
Unit
dBp-p
dB
PF = 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
0 km of fiber
(7.5 dB total passive loss with
connector), f1 + f2
Second Order Distortion 2
Standard Linearity DSO
Enhanced Linearity
-
-
-
-
-52
-58
dBc
PF = 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
0 km of fiber
Third Order Distortion 2
Standard Linearity DTB
Enhanced Linearity
-
-
-
-
-63
-65
dBc
(7.5 dB total passive loss with
connector),
2f2-f1
1. Iop, Tcase = 25°C. Test with the laser Input pin matched to a 50Ω system.
2. Iop, Tcase = 25°C. Test with laser input pin matched to a 75Ω system.
3
EMCORE CORPORATION