The PL-NL series directly modulated external cavity laser is cost effective solution for 2.5 Gbits/s digital transmission in SMF-28 fiber. This is fabricated in a hermetically sealed 14-pin butterfly package that contains thermoelectric cooler (TEC), thermistor, monitor photodiode, optical isolator.
The PL-NL 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.
● Excellent long-term wavelength stability eliminates the need for a wavelength locker
E/O Characteristics
Optical Characteristics (at 25 °C laser temperature)
Parameter
Symbol
Condition
Min.
Typical
Max.
Unit
Center Wavelength
λc
TL=15～35℃ CW
1549.62
1550.12
1550.62
nm
Peak Optical Output Power
PO
-
100
-
mW
Spectral linewidth
LW
-
-
0.5
1
MHz
Side-mode Suppression Ratio
SMSR
CW
30
40
-
dB
Optical Isolation
-
-10 < TC < +70 ºC
30
-
-
dB
Polarization Extinction Ratio
ER
-
20
-
-
dB
Relative Intensity Noise
RIN
CW, output power 5mW
-
-
-135
dB
Wavelength drift with case (-10 to 70 ºC) temperature
△λ
TL=15～35℃
-
-
±30
pm
Wavelength Temperature coefficient
Δλ/ΔT
TL=15～35℃
-
15
30
pm/ºC
Wavelength Current coefficient
Δλ/ΔΙ
-
-
1.5
2
pm/mA
Electrical Characteristics (at 25 °C laser temperature)
Parameter
Symbol
Condition
Min.
Typical
Max.
Unit
Threshold Current
ITH
-
-
40
50
mA
Slope Efficiency
ƞ
CW output power 100 mW
0.064
0.1
-
mW/mA
Operating current
Iop
CW
-
500
700
mA
TEC set temperature
Ts
-
15
-
35
℃
Laser Forward Voltage
VF
CW output power 100 mW
-
1.3
1.8
V
Monitor Dark Current
ID
-
-
-
0.1
μA
Input Impedance
ZIN
-
22
25
28
Ω
Thermistor Current
ITC
-
10
-
100
μA
Thermistor Resistance
RTH
TL = 25 °C
9.5
10
10.5
KΩ
TEC Current
ITEC
TL = 25 °C, TC = 70 °C
-
-
1.8
A
TEC Voltage
VTEC
TL = 25 °C, TC = 70 °C
-
-
3.5
V
TEC capacity
ΔT
Tc = 70℃
-
-
50
°C
Thermistor temperature
-
-
-
-
100
°C
Fiber Pigtail Specifications
Parameters
Description
Fiber Type
PM fiber
Jacket Type
900μm loose tube
Pigtail Length
1.0±0.1m
Connector Type
FC/APC
PM fiber Connector Orientation
Please see the right figure
Note: The PM fiber and the connector key are aligned to the slow axis,fast axis is blocked.
Package Size
Pin definition
1
Thermoelectric Cooler (+)
8
N/C
2
Thermistor
9
N/C
3
PD Monitor Anode (-)
10
Laser Anode (+)
4
PD Monitor Cathode (+)
11
Laser Cathode (–)
5
Thermistor
12
N/C
6
N/C
13
Case Ground
7
N/C
14
Thermoelectric Cooler (–)
Absolute Maximum Ratings
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.
Parameter
Symbol
Condition
Min.
Typical
Max.
Unit
Storage temperature
Ts
-
-40
-
85
℃
Operating case temperature
Top
-
-15
-
75
℃
Forward Current
IF
CW
-
-
900
mA
Reverse Voltage
VR
-
-
-
2
V
Photodiode Forward Current
IFPD
-
-
-
2
mA
Photodiode Reverse Voltage
VRPD
-
-
-
10
V
TEC current
ITEC
-
-
0.8
1.4
A
TEC voltage
VTEC
-
-
1.5
3.5
V
Application
● Metro and Long Haul DWDM,100 GHz spaced networks
● SONET/SDH OC-48/STM16 ring and meshed applications
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