2.5 mW 14 Pin DIL Cooled Laser
Module
Technical Data
LSC2110-622
Features
• 2.5 Milliwatt Peak Optical
Power Output
• Center Wavelength between
1294 nm and 1329 nm
• Narrow Linewidth: <1.7 nm
• Modulation Bandwidth:
>1 Ghz
• Wide Operating Tempera-
ture Range: -40
°
C to +85
°
C
• Industry Standard Hermetic
14 Pin Dual-In-Line Package
Description
LSC2110-622 laser modules are
highly reliable fiber optic light
sources operating in the 1300
nanometer band. The internal
semiconductor lasers are based
upon InGaAsP buried hetero-
structure (BH) technology and
fabricated by the Metal Organic
Vapor Phase Epitaxy (MOVPE)
process, resulting in long
lifetimes and modest threshold
currents.
LSC2110-622 package includes a
photodiode for monitoring the
laser output, a thermistor for
monitoring the laser submodule
temperature and a Peltier effect
thermoelectric cooler (TEC). A
heatsink mounting flange is
incorporated into the industry
standard 14 pin package.
The LSC2110-622 has been
specifically designed to meet the
requirements of STM4.1 and
SONET OC12 LR1 applications.
Applications
• 622 Mbit/s SONET/SDH
• 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.
468
5962-9398E (1/95)
Pin Connections
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)
Mechanical Outline
S
∅U
B
A
FIBER PIGTAIL
∅N
F
C
K L
T
M
J
P
D
E
G
∅H
R
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.
25.70
25.10
30.00 NOM.
4.20
–
–
1000
6.20
5.80
6.00 NOM.
–
6.00
3.17 NOM.
ALL DIMENSIONS IN MILLIMETERS
469
LSC2110-622 Typical Operating Characteristics
LASER FORWARD VOLTAGE
vs. FORWARD CURRENT
1.2
FORWARD VOLTAGE (V)
100
SPECTRAL CONTENT
80
1.0
RELATIVE POWER
60
40
0.5
20
0
10
20
30
40
50
60
70
80
0
1300
1305
1310
1315
FORWARD CURRENT (mA)
WAVELENGTH (nm)
MONITOR DIODE PHOTOCURRENT (µA)
2.5
OUTPUT POWER
vs. FORWARD CURRENT
800
700
600
500
400
300
200
100
0
0
MONITOR PHOTOCURRENT
vs. OUTPUT POWER
OUTPUT POWER (mW)
2.0
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)
470
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
Storage Temperature
Relative Humidity
Fiber Pull Strength
Mechanical Shock
Vibration
Symbol
If
Ir
Vlr
Vr
Ipf
Tc
Ts
RH
Conditions
DC
DC
DC
DC
DC
Pf min.
Limits
Min.
Max.
-
150
-
100
-
2
-
10
-
1
-40
+85
-40
+85
0.0
non-
condensing
-
10
Units
mA
µA
V
V
mA
°C
°C
%RH
N
Mil Std 883, Method 2002,
Condition A
Mil Std 883, Method 2007,
Condition A
Performance Specification
Parameter
LASER
Symbol
Test Conditions
Tc = -40°C to +85°C,
∆T
= +65°C (heating)
∆T
= -40°C (cooling), CW, Pf = 2.5 mW
unless otherwise stated
Min.
Max.
Units
Threshold Current
Peak Optical
Output Power
Optical Output
Power
Slope Efficiency
Forward Voltage
Differential
Resistance
Centre Wavelength
λc
Change with
Temperature
Spectral Width
Rise Time
Fall Time
Small Signal
Freq. Response
Ith
Pf
Pf
Pth
η
Vf
Rd
λc
∆λc/∆T
∆λ
τr
τf
Bw
Pth = Pf @ Ith -2 mA
Tc = 25°C, Rt = 10 kΩ
dV/dI
Mod @ 622 Mbit/s, 50% duty cycle,
ORL 20 dB
From Tc = 65°C to 85°C,
∆T
= -40°C
Modulated as for
λc,
1 x
σ,
RMS
10% to 90%: Ith to Pf = 2.5 mW
90% to 10%: Pf = 2.5 mW to Ith
±
3 dB
5
2.5
4
-
0.05
-
-
1294
-
-
-
-
1.0
25
-
-
50
0.12
1.8
10
1329
0.5
1.7
0.4
0.4
-
mA
mW
dBm
µW
mW/mA
V
Ω
nm
nm/°C
nm
ns
ns
GHz
471
Performance Specifications (cont’d.)
Parameter
MONITOR
PHOTODIODE
Photocurrent
Responsivity
Dark Current
Tracking Error
Symbol
Test Conditions
Tc = -40°C to +85°C,
∆T
= +65°C (heating)
∆T
= -40°C (cooling), CW, Pf = 2.5 mW
Vr = 5 V (Note 1), unless otherwise specified
Ratings
Min. Max.
Units
Im
R
Id
∆R
Pf = 0 mW, Tc = ~25°C, Rt = 10 kΩ
Im = Im @ (Pf = 2.5 mW, Tc = 25°C)
0.1
0.04
-
-
2.0
0.8
20
±
0.5
mA
A/W
nA
dB
Note:
1. Monitor Photodiode will also operate under zero bias conditions.
Parameter
THERMISTOR
Resistance
Temperature Coefficient of Rt
β
Constant
Symbol
Test Conditions
Tc = 25°C, unless otherwise
specified
Ratings
Min. Max.
Units
Rt
∆Rt/∆T
β
0°C to 50°C
9.5
10.5
Typ -4.4
Typ 3900
kΩ
%dR/°C
°K
Parameter
TEC
TEC Cooling Current
TEC Heating Current
Voltage
Symbol
Ic
Ih
Vc
Test Conditions
Pf = 2.5 mW, unless otherwise
specified
∆T
= -40°C, Tc = 85°C
∆T
= 65°C, Tc = -40°C
∆T
= -40°C to 65°C
Ratings
Min. Max.
Units
-
-
-
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 Cutoff 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
472
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