14 PIN DFB Laser Module
with Cooler
Technical Data
LSC2210
Features
• >1 Milliwatt Optical Output
• Center Wavelength between
1520 nm and 1565 nm
• Modulation Capability up to
1 Gbit/s
• Wide Operating
Temperature Range:
-20
°
C to +65
°
C
• Industry Standard Hermetic
14 PIN Dual-In-Line Package
Description
LSC2210 laser modules are
highly reliable fiber optic light
sources operating in the 1550
nanometer band. The internal
DFB lasers are based upon
InGaAsP ridge waveguide
technology and fabricated by the
Metal Organic Vapor Phase
Epitaxy (MOVPE) process,
resulting in long lifetimes and
modest threshold currents.
The LSC2210 package includes a
photodiode for monitoring the
laser output, a thermistor for
monitoring laser heatsink
temperature, and a Peltier effect
thermoelectric cooler (TEC). A
heatsink mounting flange is
incorporated into the industry
standard 14 PIN package.
Applications
•
•
•
•
Telecommunications
Fiber Optic Sensors
Cable Television
Military Communications
and Control Systems
• Instrumentation
Laser Safety Warning
This device is a Class IIIb (3b) Laser Product. It may emit invisible laser radiation if operated with the fiber pigtail disconnected. To avoid
possible eye damage do not look into an unconnected fiber pigtail during laser operation. Do not exceed specified operating limits.
474
5962-9396E (11/94)
LSC2210 Pin Connections and Block Diagram
Bottom View
BOTTOM VIEW
FIBER PIGTAIL
TEC CATHODE (–) 14
NC 13
THERMISTOR 12
THERMISTOR 11
LASER ANODE (+), GROUND 10
LASER CATHODE (–)
MONITOR PHOTODIODE–V SUPPLY
9
8
1 TEC ANODE (+)
2 NC
3 NC
4 RESERVED
5 CASE GROUND
6 RESERVED
7 MONITOR PHOTODIODE + V SUPPLY
LSC2210 Mechanical Outline
S
∅U
B
A
∅N
F
C
K
L
FIBER PIGTAIL
T
M
J
P
DIM.
A
B
C
D
E
F
G
∅H
J
MIN.
MAX.
20.98
20.68
1.10
0.90
13.00
12.55
9.60
8.51
6.60
6.10
7.62 NOM.
2.54 NOM.
0.457 NOM.
7.21
7.01
DIM.
K
L
M
∅N
P
R
S
T
∅U
MIN.
MAX.
19.05 NOM.
25.10
25.70
–
30.00
–
4.20
1000
–
5.80
6.20
6.00 NOM.
–
6.00
3.17 NOM.
D
R
E
G
∅H
ALL DIMENSIONS IN MILLIMETERS
475
LSC2210 Typical Operating Characteristics
2.5
CONTINUOUS WAVE POWER
AND FORWARD VOLTAGE
VS. FORWARD CURRENT
MONITOR PHOTOCURRENT (µA)
600
500
400
300
200
100
0
MONITOR PHOTOCURRENT
VS. OUTPUT POWER
FIBER POWER (mW)
1.5
1.5
1.0
1.0
0.5
0.5
0
FORWARD VOLTAGE (V)
2.0
0
20
40
60
80
100
0
0.5
1.0
1.5
2.0
2.5
FORWARD CURRENT (mA)
OUTPUT POWER (mV)
100
REL POWER
SPECTRAL CONTENT
0 dB
-20 dB
-40 dB
EFFECT OF MODULATION
ON SPECTRUM
UNMODULATED
80
RELATIVE POWER
60
REL POWER
40
0 dB
MODULATED
-20 dB
-40 dB
1540
1545
WAVELENGTH (nm)
1550
20
0
1520
1530
1540
1550
1560
1570
WAVELENGTH (nm)
476
Absolute Maximum Ratings at 25
°
C
Absolute maximum limits mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods, provided
each limiting parameter is in isolation and all other parameters have values within the performance specification. It should not be assumed that
limiting values of more than one parameter can be applied to the product at the same time.
Parameter
Laser Forward Current
Laser Reverse Current
Laser Reverse Voltage
Photodiode Forward Current
Photodiode Reverse Voltage (V
r
)
Fiber Pull Strength
Operating Temperature (Case)
Storage Temperature
Mechanical Shock
Vibration
Minimum
Maximum
-
150
-
10
-
2.0
-
1
-
-10
-
10
-20
+65
-40
+85
Mil Std 883, Method 2002, Test Condition B
Mil Std 883, Method 2007, Test Condition A
Units
mA
µA
V
mA
V
N
°C
°C
Performance Specification - Laser
[1]
Parameter
Threshold Current (I
th
)
Fiber Output Power (P
f
)
at Ith +40 mA
Rise Time: 10% to 90%; I
th
to I
th
+25 mA
Fall Time: 90% to 10%; I
th
+25 mA to I
th
Peak Wavelength
Spectral Width (-20 dB, >20 dB ORL)
[2]
, Modulated
[3]
Temperature Dependence of Peak Wavelength
Sidemodes (CW)
Sidemodes (Modulated)
[3]
Notes:
1. At 25°C and P
f
= 1 mW unless otherwise specified.
2. As measured using optical spectrum analysis.
3. Measured at 565 Mbit/s, I
th
-2 mA = “0” level. I
th
+40 mA = “1” level.
Minimum
-
1
0
-
-
1520
-
-
-
-
Maximum
60
-
-
0.4
0.4
1565
0.8
0.10
-30
-30
Units
mA
mW
dBm
ns
ns
nm
nm
nm/°C
dB
dB
477
Performance Specification - Monitor Photodiode
Parameter
Photocurrent (Im) at 1 mW
Responsivity (∆lm/∆P
f
) at V
r
= -5 V
Temperature Dependence of Responsivity
[1]
(from -20°C to 65°C, with Respect to 25°C)
Dark Current (V
r
= -5 V) at 25°C
at 65°C
Minimum
0.05
0.05
-
-
-
Maximum
-
-
±
0.5
15
1.0
Units
mA
µA/µW
dB
nA
µA
Thermistor
Test Conditions
T
c
= 25
°
C, P
f
= 0 mW
unless otherwise specified
Test Limits
Min.
Max.
9.5
10.5
Typ4.4
Typ3900
Units
kΩ
%dR/K
°K
Parameter
Resistance
Temperature Coefficient of Rt
β
Constant
Symbol
R
t
∆R
t
/∆T
β
0°C to 50°C
TEC
Test Conditions
T
c
= 25
°
C, P
f
= 1 mW
unless otherwise specified
∆T
= -40°C, T
c
= 65°C
∆T
= 45°C, T
c
= -20°C
∆T
= -20°C to +65°C
Test Limits
Min.
-
-
-
Max.
1.0
1.0
2.0
Units
A
A
V
Parameter
TEC Cooling Current
TEC Heating Current
Voltage
Symbol
I
c
I
h
V
c
Fiber Pigtail:
Tight jacketed, self-mode stripping, single mode fiber
Parameter
Length
Spot Size (mode radius)
Cladding Diameter
Core/Cladding Concentricity
Secondary Jacket Diameter
Effective Cut-off Wavelength
Minimum
1.0
4.5
122
-
0.8
1150
Maximum
-
5.5
128
1.0
1.0
1240
Units
m
µm
µm
µm
mm
nm
Hewlett-Packard can offer a ruggedized fiber pigtail for this product range if extreme mechanical strength is required. The pigtail length can be
customized to your specific length, with a connector, to a tolerance of
±25
mm.
Note:
1. Fiber output power change for constant monitor output current.
478
Test/Measurement
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