Datasheet LSC2110-622-ST, LSC2110-622-SC, LSC2110-622-SA, LSC2110-622-FP, LSC2110-622-DN Datasheet (HP)

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 Tempera­ture Range: -40°C to +85°C

• Industry Standard Hermetic
14 Pin Dual-In-Line Package

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

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 hetero­structure (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.

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

RESERVED - DO NOT CONNECT 4

RESERVED - DO NOT CONNECT 6

MONITOR PHOTODIODE CATHODE (+ve SUPPLY) 7

Mechanical Outline

S

F

∅U

K

C

J

NOT CONNECTED 2
NOT CONNECTED 3

CASE GROUND 5

B

L

TEC

A

FIBER PIGTAIL

∅N

T

M

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)

P

D

E

G

∅H

DIM. MIN. MAX.

ALL DIMENSIONS IN MILLIMETERS

20.68

A

0.90

B

12.55

C

8.51

D

6.10

E

7.62 NOM.

F

2.54 NOM.

G

0.457 NOM.

∅H

7.01

J

R

20.98

1.10

13.00

9.60

6.60

7.21

DIM. MIN. MAX.

19.05 NOM.

K

25.10

L

30.00 NOM.

M

∅N

P
R

6.00 NOM.

S
T

3.17 NOM.

∅U

–

1000

5.80

–

25.70

4.20
–

6.20

6.00

469

LSC2110-622 Typical Operating Characteristics

LASER FORWARD VOLTAGE

vs. FORWARD CURRENT

1.2

1.0

0.5

FORWARD VOLTAGE (V)

100

80

60

RELATIVE POWER

20

SPECTRAL CONTENT

0

2.5

2.0

1.5

1.0

OUTPUT POWER (mW)

0.5

0

0

302010 40 70

FORWARD CURRENT (mA)

OUTPUT POWER

vs. FORWARD CURRENT

20 40

FORWARD CURRENT (mA)

60

50

80

60

0

1300 1305401310

WAVELENGTH (nm)

MONITOR PHOTOCURRENT

800

700
600
500
400
300
200
100

0

MONITOR DIODE PHOTOCURRENT (µA)

vs. OUTPUT POWER

0

0.5 1.0 2.0 3.0 3.5

1.5 2.5

OUTPUT POWER (mW)

1315

4.0

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.

Limits

Parameter Symbol Conditions Min. Max. Units

Laser Forward Current If DC - 150 mA
Laser Reverse Current Ir DC - 100 µA
Laser Reverse Voltage Vlr DC - 2 V
Photodiode Reverse Voltage Vr DC - 10 V
Photodiode Forward Current Ipf DC - 1 mA
Operating Temperature Tc Pf min. -40 +85 °C
Storage Temperature Ts -40 +85 °C
Relative Humidity RH 0.0 non- %RH

condensing
Fiber Pull Strength - 10 N
Mechanical Shock Mil Std 883, Method 2002,

Condition A

Vibration Mil Std 883, Method 2007,

Condition A

Performance Specification

Parameter Symbol Test Conditions Min. Max. Units

LASER Tc = -40°C to +85°C, ∆T = +65°C (heating)

∆T = -40°C (cooling), CW, Pf = 2.5 mW

unless otherwise stated
Threshold Current Ith 5 25 mA
Peak Optical Pf 2.5 - mW
Output Power Pf 4 - dBm
Optical Output Pth Pth = Pf @ Ith -2 mA - 50 µW

Power
Slope Efficiency η Tc = 25°C, Rt = 10 kΩ 0.05 0.12 mW/mA
Forward Voltage Vf - 1.8 V
Differential Rd dV/dI - 10 Ω

Resistance
Centre Wavelength λc Mod @ 622 Mbit/s, 50% duty cycle, 1294 1329 nm

ORL 20 dB
λc Change with ∆λc/∆T From Tc = 65°C to 85°C, ∆T = -40°C - 0.5 nm/°C

Temperature
Spectral Width ∆λ Modulated as for λc, 1 x σ, RMS - 1.7 nm
Rise Time τr 10% to 90%: Ith to Pf = 2.5 mW - 0.4 ns
Fall Time τf 90% to 10%: Pf = 2.5 mW to Ith - 0.4 ns
Small Signal Bw ± 3 dB 1.0 - GHz

Freq. Response

471

Performance Specifications (cont’d.)

Ratings

Parameter Symbol Test Conditions Min. Max. Units

MONITOR Tc = -40°C to +85°C, ∆T = +65°C (heating)
PHOTODIODE ∆T = -40°C (cooling), CW, Pf = 2.5 mW

Vr = 5 V (Note 1), unless otherwise specified
Photocurrent Im 0.1 2.0 mA
Responsivity R 0.04 0.8 A/W
Dark Current Id Pf = 0 mW, Tc = ~25°C, Rt = 10 kΩ -20nA
Tracking Error ∆R Im = Im @ (Pf = 2.5 mW, Tc = 25°C) - ± 0.5 dB

Note:

1. Monitor Photodiode will also operate under zero bias conditions.

Ratings

Parameter Symbol Test Conditions Min. Max. Units

THERMISTOR Tc = 25°C, unless otherwise

specified

Resistance Rt 9.5 10.5 kΩ
Temperature Coefficient of Rt ∆Rt/∆T Typ -4.4 %dR/°C
β Constant β 0°C to 50°C Typ 3900 °K

Ratings

Parameter Symbol Test Conditions Min. Max. Units

TEC Pf = 2.5 mW, unless otherwise

specified

TEC Cooling Current Ic ∆T = -40°C, Tc = 85°C - 1.0 A
TEC Heating Current Ih ∆T = 65°C, Tc = -40°C - 1.0 A
Voltage Vc ∆T = -40°C to 65°C - 2.0 V

Fiber Pigtail: Tight jacketed, self-mode stripping, single mode fiber

Parameter Minimum Maximum Units

Length 1.0 - m
Spot Size (Mode Radius) 4.5 5.5 µm
Cladding Diameter 122 128 µm
Core/Cladding Concentricity - 1.0 µm
Secondary Jacket Diameter 0.8 1.0 mm
Effective Cutoff Wavelength 1150 1240 nm

472

Ordering Information

LSC2110 - 622 - XX

Handling Precautions

1. The LSC2110-622 can be
damaged by current surges or
overvoltage.

2. Power supply transient
precautions should be taken.

3. Normal handling precautions
for electrostatic sensitive
devices should be taken.

Connector Type:
FP = FC/PC
ST = ST

®

SC = SC
DN = DIN
BI = Biconic
SA = SMA
SF = Super Polish FC/PC

CDRH Certification

Hewlett-Packard Ltd
Whitehouse Road
Ipswich, Suffolk IP1 5PB
England

Manufactured: _______ Serial No. _______
Model No. ____________

This product conforms to the applicable
requirements of 21 CFR 1040 at the date of
manufacture.

ST® is a Registered Trademark of AT&T.

Laser Warning

473