1550nm DFB Butterfly Laser Modules
Key Features
DFB Laser Chip,Butterfly Package
High Stabilization
Standard ITU Grid Wavelengths
Telecordia GR-468-CORE Compliant
RoHS Compliant
Applications
Narrow transmitter
CATV system
Architectures Using Separate Optical Wavelengths to Carry Targeted Services
Description
1550nm DFB laser Modules is a Dense Wavelength-Division Multiplexing (DWDM) laser for analog
applications. It features a distributed feedback chip that has been designed specifically for
Ratio Frequency (RF) applications, the laser module has a wide temperature range for reliable
performance in harsh node environments and narrow transmitter designs. It also features low
adiabatic chirp to maximize signal quality in short and long lengths of fiber. The laser’s
excellent inherent linearity minimizes degradation of the broadcast signals caused by quadrature
amplitude modulated (QAM) channels. The laser module reduces cable network architecture fiber
needs and lessens equipment requirements in the hub.
1550nm DFB laser Modules is available in a wide range of standard ITU wavelengths. The lasers are
offered as either forward-path (40MHz – 860MHz) or return-path ( 5MHz– 200MHz) modules.
Absolute Maximum Ratings
|
Parameter
|
Symbol
|
Min
|
Max
|
Unit
|
|
Storage Temperature
|
Tstg
|
-40
|
85
|
℃
|
|
Relative Humidity
|
RH
|
0
|
85
|
%
|
|
LD Forward Current
|
ILF
|
-
|
150
|
mA
|
|
LD Reverse Voltage
|
VLR
|
-
|
1
|
V
|
|
PD Reverse Voltage
|
VR
|
-
|
10
|
V
|
|
TEC Current
|
Itec
|
-
|
1.8
|
A
|
|
TEC Voltage
|
Vtec
|
-
|
2.5
|
V
|
|
Lead Soldering Temperature and Time
|
Tsold/t
|
-
|
260/10
|
℃/s
|
|
Fiber bend radius
|
r
|
30
|
-
|
mm
|
Recommended Operating Conditions
|
Parameter
|
Symbol
|
Min.
|
Max.
|
Unit
|
|
Case Operating Temperature Range
|
Top
|
-20
|
65
|
℃
|
|
Relative Humidity
|
RH
|
0
|
85
|
%
|
Optical/Electrical Characteristics
|
Parameter
|
Symbol
|
Test Conditions
|
Min.
|
Typ
|
Max.
|
Unit
|
|
Threshold Current
|
Ith
|
@25℃,CW
|
-
|
-
|
30
|
mA
|
|
Operation Current
|
Iop
|
-
|
-
|
-
|
120
|
mA
|
|
Optical Output Power
|
P
|
@25℃, IF=Iop
|
10
|
-
|
-
|
mW
|
|
Monitor Operation Current
|
IMON
|
@25℃, CW
|
10
|
-
|
200
|
μA/mW
|
|
TEC Current
|
ITEC
|
-
|
-
|
-
|
1.8
|
A
|
|
Thermistor Resistance
|
RT
|
@25℃
|
9.5
|
10
|
10.5
|
kΩ
|
|
Thermistor Temp. Coeff.
|
α
|
@25℃
|
-
|
-4.39
|
-
|
%/℃
|
|
Peak Wavelength
|
c
|
@25℃, IF=Iop
|
1528
|
|
1563
|
nm
|
|
3dB Bandwidth
|
BW
|
@25℃, IF=Iop
|
-
|
-
|
1.2
|
GHz
|
|
Side Mode Suppression Ratio
|
SMSR
|
@25℃, IF=Iop
|
35
|
-
|
-
|
dB
|
|
Isolation
|
ISO
|
@25℃,CW
|
30
|
-
|
-
|
dB
|
|
Laser Relative Intensity Noise
|
RIN
|
@25℃, IF=Iop
|
-
|
＜-155
|
-
|
dB/Hz
|
|
Fiber Length
|
-
|
-
|
1.0
|
1.5
|
|
m
|
|
Fiber Core/Cladding/Buffer
|
-
|
-
|
|
9/125/900
|
|
μm
|
RF Characteristics
|
Parameter
|
Symbol
|
Test Conditions
|
Min.
|
Typ .
|
Max.
|
Unit
|
|
Composite Second Orde
|
CSO
|
@25℃, IF=Iop
|
50
|
-
|
-
|
dB
|
|
Composite Triple Beat
|
CTB
|
@25℃, IF=Iop
|
60
|
-
|
-
|
dB
|
|
Carrier to Noise Ratio
|
CNR
|
@25℃, IF=Iop
|
51
|
-
|
-
|
dB
|
