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460

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.

Description

LSCX110

1 mW 14 Pin DIL Cooled Laser
Modules

Technical Data

Features

· 1 Milliwatt Optical

Output at 25 mA
above Threshold, 25

· Center Wavelength between

1280 nm and 1330 nm

· Wide Modulation

Bandwidth:
LSC2110 - 800 MHz
LSC4110 - 1.2 GHz

· Wide Operating

Temperature Range: -40

to +85

· Alternative Package Styles:

LSC2110 - 14 Pin DIL
LSC4110 - 14 Pin"Butterfly"

Applications

· Telecommunications

· Local Area and Metropolitan

Area Networks

· Point-to-Point Data

Communications

· Fiber Optic Sensors

· Cable Television

· Military Communications

and Control Systems

· Instrumentation

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.

5963-5308E (1/95)

461

LSC2110
Top View

Pin Connections

LSC4110
Top View

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)

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

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

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

462

LSCX110 Laser Diode Typical Operating Characteristics

RELATIVE POWER

1290

WAVELENGTH (nm)

1320

100

1300

1310

SPECTRAL CONTENT

FIBER POWER (mW)

FORWARD CURRENT (mA)

1.5

2.0

1.0

OUTPUT POWER

vs. FORWARD CURRENT

0.5

MONITOR DIODE PHOTOCURRENT (µA)

OUTPUT POWER (mW)

4.0

500

800

1.5

2.5

300

MONITOR PHOTOCURRENT

vs. OUTPUT POWER

600

100

0.5 1.0

2.0

3.0 3.5

700

400

200

FORWARD VOLTAGE (V)

FORWARD CURRENT (mA)

1.0

1.5

0.5

LASER FORWARD VOLTAGE

vs. FORWARD CURRENT

463

0.04

1280

800

1.2

Absolute Maximum Ratings

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

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.

%RH

VIr

Ipf

Pf = 1 mW

Mil Std 883, Method 2002,

Test Condition A

Mil Std 883, Method 2007,

Test Condition A

Performance Specifications

non-

condensing

Max.

150

100

+85

-40

0-0

Min.

Limits

LASER

Threshold Current

Ith Change with Temperature

Peak Optical Output

Optical Output Power

Slope Efficiency

Forward Voltage

Differential Resistance

Center Wavelength

c Change with Temperature

Linewidth

Rise Time

Fall Time

Small Signal Frequency Response

LSC2110

LSC4110

CW, Rt = 10 k

, Tc = ~25

unless otherwise specified

Tc = 65

C to 85

Pf = Pf @ Ith + 25 mA

Pth = Pf @ Ith - 2 mA

dV/dl

Note 1

Tc = 65

C to 85

T = -40

FWHM (2.35

), Note 1

10% to 90%: Ith to Pf = 1 mW

90% to 10%: Pf = 1 mW to Ith

m = 0.8

Ith

Ith/

Pth

Symbol

Parameter

Test Conditions

Units

Note:
1. Modulated measurements also available.

Parameter

Units

Symbol

Conditions

Max.

2.5

0.1

1.8

1330

0.4

0.5

Min.

Test Limits

mW/mA

nm/

MHz

GHz

Units

464

1.0

2.0

Typ -4.4

Typ 3900

THERMISTOR

Resistance

Temperature Coefficient of Rt

ß Constant

%dR/K

0.08

800

0.8

0.5

A/W

Rt = 10 k

, Tc = ~25

C, CW,

Pf = 1 mW, Vr = 5 V (Note 2)

unless otherwise specified

Pf = 0 mW

Im = Im @ (Pf = 1 mW, Tc = 25

T = -40

C, Tc = 85

T = +65

C, Tc = -40

MONITOR PHOTODIODE

Photocurrent

Responsivity

Dark Current

Tracking Error

Performance Specifications (cont'd.)

Max.

Min.

Parameter

Units

Symbol

Test Conditions

Test Limits

Note:
2. Monitor Photodiode will also operate under zero bias conditions.

Test Limits

Min.

Max.

Units

Test Conditions

Parameter

Symbol

Rt/

Tc = 25

C, Pf = 0 mW

unless otherwise specified

C to 50

TEC

TEC Cooling Current

TEC Heating Current

Voltage

Parameter

Symbol

Units

Min.

Max.

Tc = 25

C, Pf = 1 mW

unless otherwise specified

T = -40

C, Tc = 85

T = 65

C, Tc = -40

T = -40

C to +65

Test Limits

Test Conditions

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

1240

Units

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.

9.5

10.5

Part Number LSC4110

Document Outline