1 mW 14 Pin DIL Cooled Laser
Modules
Technical Data
LSCX110
Features
• 1 Milliwatt Optical
Output at 25 mA
above Threshold, 25
°
C
• Center Wavelength between
1280 nm and 1330 nm
• Wide Modulation
Bandwidth:
LSC2110 - 800 MHz
LSC4110 - 1.2 GHz
• Wide Operating
Temperature Range: -40
°
C
to +85
°
C
• Alternative Package Styles:
LSC2110 - 14 Pin DIL
LSC4110 - 14 Pin“Butterfly”
Description
LSCX110 laser modules are
highly reliable fiber optic light
sources operating in the 1300
nanometer band. The internal
semiconductor lasers are
based upon InGaAsP buried
heterostructure (BH) technology
and fabricated by the Metal
Organic Vapor Phase Epitaxy
(MOVPE) process, resulting
in long lifetimes and modest
threshold currents.
LSCX110 packages include 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 base of the
14 pin “butterfly” package and a
“bullhorn” type flange is used
on the 14 pin DIL package.
Applications
• Telecommunications
• Local Area and Metropolitan
Area Networks
• Point-to-Point Data
Communications
• 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.
460
5963-5308E (1/95)
Pin Connections
LSC2110
Top View
TEC ANODE (+ve SUPPLY TO COOL) 1
NOT CONNECTED 2
NOT CONNECTED 3
RESERVED - DO NOT CONNECT 4
CASE GROUND 5
RESERVED - DO NOT CONNECT 6
MONITOR PHOTODIODE CATHODE (+ve SUPPLY) 7
TEC
14 TEC CATHODE (-ve SUPPLY TO COOL)
13 NOT CONNECTED
12 THERMISTOR
11 THERMISTOR
10 LASER ANODE (+ve SUPPLY) CASE GROUND
9 LASER CATHODE (-ve SUPPLY)
8 MONITOR PHOTODIODE ANODE (-ve SUPPLY)
LSC4110
Top View
TEC ANODE (+ve SUPPLY TO COOL) 1
THERMISTOR 2
MONITOR PHOTODIODE ANODE (-ve SUPPLY) 3
MONITOR PHOTODIODE CATHODE (+ve SUPPLY) 4
CASE GROUND 5
NOT CONNECTED 6
NOT CONNECTED 7
TEC
14 TEC CATHODE (-ve SUPPLY TO COOL)
13 LASER ANODE (+ve SUPPLY) CASE GROUND
12 NOT CONNECTED
11 LASER CATHODE (-ve SUPPLY)
10 CASE GROUND
9 NOT CONNECTED
8 NOT CONNECTED
461
LSCX110 Laser Diode Typical Operating Characteristics
1.5
LASER FORWARD VOLTAGE
vs. FORWARD CURRENT
100
SPECTRAL CONTENT
FORWARD VOLTAGE (V)
80
1.0
RELATIVE POWER
60
40
0.5
20
0
0
10
20
30
40
50
60
70
80
0
1290
1300
1310
1320
FORWARD CURRENT (mA)
WAVELENGTH (nm)
MONITOR DIODE PHOTOCURRENT (µA)
2.0
OUTPUT POWER
vs. FORWARD CURRENT
800
700
600
500
400
300
200
100
0
0
MONITOR PHOTOCURRENT
vs. OUTPUT POWER
FIBER POWER (mW)
1.5
1.0
0.5
0
0
20
40
60
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT POWER (mW)
FORWARD CURRENT (mA)
462
Absolute Maximum Ratings
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 Reverse Voltage
Photodiode Forward Current
Operating Temperature (Case)
Storage Temperature
Relative Humidity RH
Fiber Pull Strength
Mechanical Shock
Vibration
Symbol
If
Ir
VIr
Vr
Ipf
C
Ts
Conditions
DC
DC
DC
DC
DC
Pf = 1 mW
Limits
Min.
-
-
-
-
-
-40
-40
0-0
-
Max.
Units
150
mA
100
µA
2
V
10
V
1
mA
+85
°C
+85
°C
non-
%RH
condensing
10
N
Mil Std 883, Method 2002,
Test Condition A
Mil Std 883, Method 2007,
Test Condition A
Performance Specifications
Parameter
LASER
Threshold Current
Ith Change with Temperature
Peak Optical Output
Optical Output Power
Slope Efficiency
Forward Voltage
Differential Resistance
Center Wavelength
λc
Change with Temperature
Linewidth
Rise Time
Fall Time
Small Signal Frequency Response
LSC2110
LSC4110
Note:
1. Modulated measurements also available.
Symbol
Test Conditions
CW, Rt = 10 kΩ, Tc = ~25°C
unless otherwise specified
Test Limits
Min.
Max.
Units
Units
Ith
∆Ith/∆T
Pf
Pth
η
Vf
Rd
λc
∆λc/∆T
∆λ
τr
τf
Bw
Bw
Tc = 65°C to 85°C
Pf = Pf @ Ith + 25 mA
Pth = Pf @ Ith - 2 mA
dV/dl
Note 1
Tc = 65°C to 85°C,
∆T
= -40°C
FWHM (2.35
σ),
Note 1
10% to 90%: Ith to Pf = 1 mW
90% to 10%: Pf = 1 mW to Ith
m = 0.8
m = 0.8
5
-
1
-
0.04
-
-
1280
-
-
-
-
800
1.2
25
2.5
2.5
50
0.1
1.8
10
1330
0.4
5
0.5
0.5
-
-
mA
%/°C
mW
µW
mW/mA
V
Ω
nm
nm/°C
nm
ns
ns
MHz
GHz
463
Performance Specifications (cont'd.)
Parameter
Symbol
Test Conditions
Rt = 10 kΩ, Tc = ~25°C, CW,
Pf = 1 mW, Vr = 5 V (Note 2)
unless otherwise specified
Im
R
Id
∆R
80
0.08
-
-
-
800
0.8
20
±
0.5
±
0.5
µA
A/W
nA
dB
dB
Test Limits
Min.
Max.
Units
MONITOR PHOTODIODE
Photocurrent
Responsivity
Dark Current
Tracking Error
Pf = 0 mW
Im = Im @ (Pf = 1 mW, Tc = 25°C)
∆T
= -40°C, Tc = 85°C
∆T
= +65°C, Tc = -40°C
Note:
2. Monitor Photodiode will also operate under zero bias conditions.
Parameter
THERMISTOR
Resistance
Temperature Coefficient of Rt
ß Constant
Symbol
Test Conditions
Tc = 25°C, Pf = 0 mW
unless otherwise specified
Test Limits
Min.
Max.
Units
Rt
∆Rt/∆T
ß
9.5
0°C to 50°C
10.5
Typ -4.4
Typ 3900
kΩ
%dR/K
°K
Parameter
TEC
TEC Cooling Current
TEC Heating Current
Voltage
Symbol
Test Conditions
Tc = 25°C, Pf = 1 mW
unless otherwise specified
∆T
= -40°C, Tc = 85°C
∆T
= 65°C, Tc = -40°C
∆T
= -40°C to +65°C
Test Limits
Min.
Max.
Units
Ic
Ih
Vc
-
-
-
1.0
1.0
2.0
A
A
V
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.
464
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