Datasheet A371-22FD, A371-22BD, A371-22AD, A371-20GS, A371-20FS Datasheet (AGERE)

™

Data Sheet
January 1999

A371-Type Analog Uncooled Isolated

DFB

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■

■

■

■

FastLight

Laser Module

No thermoelectric cooler required
Single- and double-isolated versions available
High output power: typically 2.0 mW peak power

coupled into single-mode fiber
Hermetically sealed active components
Internal back-facet monitor

The low-profile A371-Type Analog Laser Module is ideally
suited for CATV applications, particularly in systems where
long spans and superior reliability are the critical consider­ations.

Features

Eight-pin package suitable for CATV applications

■

Narrow linewidth, distributed-feedback,

■

multiquantum-well (DFB-MQW)1.3 µ m laser with
single-mode fiber pigtail

Wide operating temperature range:

■

–40 ° C to +85 ° C
Frequency range up to 1.0 GHz

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Qualification program: Bellcore TA-983

Applications

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Video and data applications

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Downstream telephony and data

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Return path systems

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Mixed analog and digital modulation

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Telecommunications

Benefits

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Easily board mounted

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Requires no lead bending

■

No additional heat sinks required

■

Pin compatible with industry-standard, 14-pin laser
module

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Highly efficient DFB-MQW laser structure allows
for lower threshold and drive currents , and reduced
power consumption

■

High output power allows for longer system spans ,
more fiber splits, and greater tolerance of fiber and
connector quality

■

Internal isolator minimizes spurious noise

±

°

°

A371-Type Analog Uncooled Isolated Data Sheet
DFB

FastLight

Laser Module January 1999

Description

The A371-Type Uncooled Isolated Laser Module con­sists of a laser diode coupled to a single-mode fiber
pigtail. The device is available in a standard, 8-pin con­figuration (see Figure 1 and/or Table 1) and is ideal for
CATV applications.

The module includes a narrow linewidth (<1 nm), DFB­MQW, single-mode laser and an InGaAs PIN photo­diode back-facet monitor in a hermetically sealed pack­age.

The device characteristics listed in this document are
met at 2.0 mW output power. Higher- or lower-power
operation is possible. Under conditions of a fixed pho­todiode current, the change in optical output is typically

0.5 dB over an operating temperature range of –40 ° C

to +85 ° C.
This device incorporates the new Laser 2000 manufac-

turing process from the Optoelectronics unit of Lucent
Technologies Microelectronics Group. Laser 2000 is a
low-cost platform that targets high-volume manufactur­ing and tight product distributions on all optical subas­semblies. This platform incorporates an advanced
optical design that is produced on Opto’s highly auto­mated production lines. The Laser 2000 platform is
qualified for central office and uncontrolled environ­ments, and can be used for applications requiring high
performance and low cost.

43 12

56 87

1-900 (C)

Figure 1. A371-T ype Analog Uncooled Isolated DFB

Laser Module Schematic, Top View

Table 1. Pin Descriptions

Pin Number Connection

1NC
2 Case ground
3NC
4 Photodiode cathode
5 Photodiode anode
6 Laser diode cathode
7 Laser diode anode
8NC

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso­lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.

Parameter Symbol Min Max Unit

Maximum Peak Laser Drive Current or

Maximum Fiber Power*

Peak Reverse Laser Voltage:

Laser

Monitor
Monitor Forward Current I
Operating Case Temperature Range T
Storage Case Temperature Range T
Lead Soldering Temperature/Time — — 260/10 ° C/s
Relative Humidity (noncondensing) RH — 85 %

* Rating varies with temperature.

22

OP

I

P

MAX

V

RL
RD

V

FD

C

stg

—
—

—
—

150

10

2

20

mA

mW

V
V

—2mA
–40 85
–40 85

C
C

Lucent Technologies Inc.

°

∆λ

Ω

µ

Data Sheet A371-Type Analog Uncooled Isolated
January 1999 DFB

FastLight

Laser Module

Handling Precautions

Caution: This device is susceptible to damage as a result of electrostatic discharge (ESD). Take proper

precautions during both handling and testing. Follow guidelines such as JEDEC Pub lication No.
108-A (Dec. 1988).

Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD.

Electro/Optical Characteristics

Table 2. Electro/Optical Characteristics (over operating temperature range unless otherwise noted)

Parameter Symbol Test Conditions Min Typ Max Unit

Operating Temperature

Range
Optical Output Power* P
Threshold Current I

Drive Current Above

Threshold
Slope Efficiency SE CW, P
Center Wav elength
Spectral Width (–20 dB)
Side-mode Suppression

Ratio
Tracking Error TE I
Forward Voltage V
Input Impedance R — 3 — 8
Monitor Current I
Monitor Dark Current I
Wavelength Temperature

Coefficient

* See Table 5 for more information.
†V

R

= reverse voltage.

T — –40 — 85

F

TH

I

MOD

CW, P

CW, I

λ

C

SMSR CW, P

F

MON

D

CW, nominal — 2 — mW

T = 25 ° C

T = full range

= 2.0 mW, T = 25 ° C

F

= const., T = full range

MON

= 2.0 mW, T = 25 ° C 67 — 200 µ W/mA

F

P

= 2.0 mW, CW 1280 — 1335 nm

F

F

P

= 2.0 mW — — 1 nm

F

= 2.0 mW 30 40 — dB

MON

= constant, CW — 0.5 1.25 dB

5
2

10

7.5

11
—

20
—

15
50

30
55

CW — 1.1 1.6 V

†

V

R

= 5 V 100 — 1000

†

V

= 5 V — 10 200 nA

R

— — — 0.09 0.1 nm/ ° C

C

mA
mA

mA

A

Lucent Technologies Inc.

3

A371-Type Analog Uncooled Isolated Data Sheet
DFB

FastLight

Laser Module January 1999

Electro/Optical Characteristics

(continued)

Analog Operation

The A371-Type Laser Module has the capability of being used in a wide variety of analog operations. These may
include several channels of pure video signals , or a mix of video signals with digital data channels riding on analog
carriers. It is difficult to prepare a single battery of testing conditions that will satisfy all applications. The following
table contains a set of testing conditions that Lucent believes will give a broad indication of the performance of the
A371 Series Laser Module. Please contact your local Field Application Engineer if different testing conditions and
parametric limits are required.

The distortion characteristics are measured using a two-tone test. The frequencies are 13 MHz and 19 MHz. The
second-order distortion components are measured at f1 + f2 = 32 MHz and f1 – f2 = 6 MHz. All third-order distor­tion components are measured in the frequency range of 5 MHz—200 MHz, and they meet the required level. All
measurements are made with SC-SPC connectors on the laser module pigtails.

Table 3. Analog Characteristics

Parameter Symbol Test Conditions Min Typ Max Unit

Output Power* P

O

Relative Intensity Noise RIN CW, P

Modulation Bandwidth BW –3 dB, P

Second-order Distortions — T = 25 ° C, P

Third-order Distortions — T = 25 ° C, P

Spurious Noise N

Spurious Noise (carrier off) N'

RF Bandpass Flatness B

* See Table 5 for more information.
†Double-isolated version.
‡Low-performance option.

§Single- and double-isolated versions.

SP

SP

P

F Peak to valley, 5 MHz to 200 MHz — — 1.0 dB

CW, T = –40 ° C to +85 ° C — 2.0 — mW

= 2.0 mW,

F

— –155 –145 dB/Hz

Freq. = 5 MHz to 300 MHz;

no fiber loss, T = –40 ° C to +85 ° C

F

= 2.0 mW,

1.0 — — GHz

T = –40 ° C to +85 ° C

F

= 2.0 mW , OMI = 0.2;
Two-tone test: f1 = 13 MHz,
f2 = 19 MHz; 20 km of fiber,

— –54

–58

–46

–50

†

–54
–42

(7 dB loss) plus connector loss,

f1 ± f2

= 2.0 mW , OMI = 0.2;

F

Two-tone test: f1 = 13 MHz,
f2 = 19 MHz; 20 km of fiber

— –70

–75

–69

–63

†

–68
–61

(7 dB loss), plus connector loss,

all peaks from 5 MHz—50 MHz

meet this level

T = 25 ° C, P

ref. to one-tone: 5 MHz to 50 MHz,

F

= 2.0 mW , OMI = 0.2;

— –63

–61

–60
–58

20 km of fiber, (7 dB loss) plus

connector loss

T = 25 ° C, P

= 2.0 mW — –50

F

–54

–45

–45

†

–50
–40

dBc

†

dBc

‡

dBc

dBc

†

dBc

‡

dBc

§

dBc

‡

dBc

dBc

†

dBc

‡

dBc

4

Lucent Technologies Inc.

Data Sheet A371-Type Analog Uncooled Isolated

(

)

January 1999 DFB

FastLight

Laser Module

Outline Diagram

Dimensions are in inches (and millimeters).

TRADEMARK, CODE, LASER SERIAL NUMBER,

AND/OR DATE CODE IN APPROXIMATE AREA SHOWN

3

4

5678

21

0.52 (13.2)

1.06 (27.0)
MIN

39.37 (1000) MIN

PIGTAIL LENGTH

0.20 (5.00)

0.165 (4.20)

0.100 (2.54)

0.300
(7.62)

0.045 (1.143)

0.016 (0.410)

0.110 (2.79)

0.010

(0.254)

0.29

(7.37)

0.17

(4.32)

0.30

7.62

0.085
(2.16)

1-899.f

Lucent Technologies Inc.

5

A371-Type Analog Uncooled Isolated Data Sheet
DFB

FastLight

Laser Module January 1999

Qualification Information

The A371-Type Laser Module has completed and passed the following qualification tests and meets the intent of
Bellcore TR-NWT-000468 for interoffice environments and TA-TSY-000983 for outside plant environments.

Table 4. A371-Type Laser Module Qualification Test Plan

Qualification Test Conditions Sample Size Reference

Mechanical Shock

Vibration

Solderability

Thermal Shock

Fiber Pull
Accelerated (Biased) Aging

High-temperature Storage
Temperature Cycling

Cyclic Moisture Resistance

Damp Heat

Internal Moisture

Flammability

ESD Threshold

20 g, 20 Hz—2,000 Hz

<5,000 ppm water vapor

500 G

—

Delta T = 100 °C

1 kg; 3 times

85 °C, 5,000 hrs.

85 °C, 2,000 hrs.

500 cycles

10 cycles

40 °C, 95% RH,

1,344 hrs.

—

—

11 MIL-STD-883

Method 2002

11 MIL-STD-883

Method 2007

11 MIL-STD-883

Method 2007

11 MIL-STD-883

Method 2003
11 Bellcore 983
25 Bellcore 983

Section 5.18
11 Bellcore 983
11 Bellcore 983

Section 5.20
11 Bellcore 983

Section 5.23
11 MIL-STD-202

Method 103

11 MIL-STD-883

Method 1018

— TR357

Sec. 4.4.2.5

6 Bellcore 983

Section 5.22

6

Lucent Technologies Inc.

Data Sheet A371-Type Analog Uncooled Isolated
January 1999 DFB

FastLight

Laser Module

Laser Safety Information

Class IIIb Laser Product

This product complies with 21 CFR 1040.10 and 1040.11.

8.3 µm single-mode pigtail or connector
Wavelength = 1.3 µm
Maximum power = 10 mW
Because of size constraints, laser safety labeling is not affixed to the module but attached to the outside of the
shipping carton.
Product is not shipped with power supply.

Caution: Use of controls, adjustments, and procedures other than those specified herein may result in

hazardous laser radiation exposure.

DANGER

INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE TO BEAM.

Indium Gallium Arsenide Phosphide Laser

10 mW max. Output @ 1.3 µm

Class IIIb Laser Product

Complies with 21 CFR 1040.10 and 1040.11

DANGER

INVISIBLE RADIATION IS EMITTED FROM THE END OF THE FIBER OR CONNECTOR.

AVOID DIRECT EXPOSURE TO THE BEAM.

DO NOT VIEW WITH OPTICAL INSTRUMENTS.

µm

Lucent Technologies Inc.

7

A371-Type Analog Uncooled Isolated Data Sheet
DFB

FastLight

Laser Module January 1999

Ordering Information

Table 5. Ordering Information

Device Code Comcode Pfiber Connector

Performance

Option

A371-20AS 108053307 2.0 mW SC-PC Single Isolator
A371-20BS 108173956 2.0 mW SC-APC Single Isolator
A371-20FS 108120445 2.0 mW FC-PC Single Isolator
A371-20GS 108130444 2.0 mW FC-APC Single Isolator
A371-20NS 108043522 2.0 mW none Single Isolator

A371-22AD 108348699 2.0 mW SC-PC Double Isolator
A371-22BD 108348707 2.0 mW SC-APC Double Isolator

A371-22FD 108348715 2.0 mW FC-PC Double Isolator
A371-22GD 108348723 2.0 mW FC-APC Double Isolator
A371-22ND 108348731 2.0 mW none Double Isolator

A371-24AS 108401019 2.0 mW SC-PC Low Performance

A371-24BS 108401027 2.0 mW SC-APC Low Performance

A371-24FS 108401035 2.0 mW FC-PC Low Performance
A371-24GS 108401043 2.0 mW FC-APC Low Performance
A371-24NS 108401050 2.0 mW none Low Performance

For additional information, contact your Microelectronics Group Account Manager or the following:

INTERNET: http://www.lucent.com/micro, or for Optoelectronics information, http://www.lucent.com/micro/opto
E-MAIL: [e-mail]
N. AMERICA: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103

ASIA PACIFIC:Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
CHINA: Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road,
JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. [phone], FAX [phone]

Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.

Copyright © 1999 Lucent Technologies Inc.
All Rights Reserved

January 1999
DS99-035LWP (Replaces DS98-433LWP)

1-800-372-2447, FAX [phone] (In CANADA: 1-800-553-2448, FAX [phone])
Tel. [phone], FAX [phone]

Shanghai 200233 P. R. China
Tel. [phone], FAX [phone]
Technical Inquiries:OPTOELECTRONICS MARKETING: (44) 1344 865 900 (Ascot UK)

Tel. [phone], ext. 316, FAX [phone]

FastLight

is a trademark of Lucent Technologies Inc.