3970-Type - Agere Systems, Inc.

3970-Type 1550 nm Transmitter

Data Sheet

October 2001

Features

■Extremely fast time to market and very low engi-

neering investment

■Superior CNR, CSO, and CTB perf ormance on two

high-power optical outputs

■Mobile field-tuning application provides real-time

performance optimization

■High SBS suppression capabilities enhance archi-

tectural options and coverage

■Multiple programmable tuning optimizations per

transmitter facilitate inventory management and

performance across architectures

Applications

■High-performance supertrunking links

■High-launch power distribution networks

■Redundant analog ring architectures

Description

The 3970-type, externally modulated 1550 nm trans-

mitter provides CATV systems integrators one of the

fastest and easiest paths to customer value-added,

high-performance solutions.

The 1550 nm transmitter engine incorporates a

source laser optimized to improve transmitter and link

performance with high specifications and better sig-

nal quality. This advantage drives superior control of

RIN through fiber and management of dispersion,

stimulated brillouin scattering, and self-phase modu-

lation for better noise and distortion performance

over long-distance applications.

The transmitter embedded system software also pro-

vides the ability to load and store multiple configura-

tions of the transmitter tuning parameters. In this wa y,

a single transmitter can be optimized for more than

one set of link characteristics. This feature simplifies

inventory and reduces multiple device management.

The software controls, monitors, generates/pro-

cesses alarms, and handles faults for transmitter

subsystems. The system software also accommo-

dates three interfaces for two-way communication

with the transmitter. A two-line front panel user inter-

face provides system status and telemetry, and

accepts user commands. Fine tuning can be accom-

plished in the field through an RS-232 serial inter-

face. System software upgrades can be downloaded

on-the-fly into the transmitter via this interface. A

well-defined API at the RS-485 network interface will

enable custom applications and network manage-

ment systems to communicate with and control the

transmitter.

2Agere Sy st ems Inc.

Data Sheet

3970-Type 1550 nm Transmi tter October 200 1

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-

lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess

of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended

periods can adversely affect device reliability.

Characteristics

1. Input range over which specifications are met.

2. Received power is 0 dBm. Receiver responsivity is assumed to be 1.0 mA/mW, and receiver equivalent noise current is 8 pA/(Hz)1/2.

3. F or link consisting of transmitter, EDFA, 65 km of SMF-28 fiber, and receiver. EDFA noise figure is 5 dB minimum. Launch power from EDFA

is 16 dBm minimum. Noise bandwidth is 4 MHz for NTSC, 5 M Hz for PAL and Cenelec.

4. Measured per NCTA recommended practice, e xcept when measured with appropriate adjustments to the transmitter to prevent AGC-induced

gain change, which corrupts XMOD measurement.

5. All specifications apply to both out puts.

Parameter Symbol Min Max Unit

Operating Temperature Range TOP 050

°C

Storage Case Temperature Range Tstg –20 65 °C

Table 1. Optical/Electrical Characteristics

Parameter Device Code Unit

3970A 3970B 3970C 3970D 3970E 3970F

Channel Plan 79 NTSC 40 NTSC

Low 39 NTSC

High 112 NTSC 60 PAL-D 42 Cen-

elec —

Optical Output (min) 7 Each 7 Each 7 Each 7 Each 7 Each 7 Each dBm

Wavel en gth Rang e 1540—

1560 1540—

1560 nm

Flatness (max)

42 MHz—750 MHz

42 MHz—870 MHz 1.0

1.5 1.0

1.5 dBp-p

dBp-p

RF Return Loss (min),

42 MHz—870 MHz 16 16 16 16 16 16 dB

RF Input Level, CW117—27 20—30 20—30 15.5—25.5 18—28 22—32 dBmV/

channel

Carrier-to-Noise Ratio

(min), 65 km2, 3 52 55 55 49 52 52 dB

Composite Second

Order (min)2, 3, –65 –70 –70 –60 –65 –65 dBc

Composite Triple Beat

(min)2, 3, –65 –67 –67 –62 –65 –65 dBc

Cross Modulation

(min)2, 3, 4, –65 –65 –65 –60 –65 –65 dBc

Number of Outputs5222222—

Agere Systems Inc.

Data Sheet

October 2001 3970-Type 1550 nm Transmitter

Electrical/Optical Characteristics (continued)

Outline Diagram

Table 2. Power Requirements

Parameter Min Max Unit

ac Input Range 94

50 245

60 Vac

dc Input Range, Floating 36 60 Vdc

Power —50 W

Table 3. Package Characteristics

Parameter Dimension unit

Height 1.72 (44), 1U in. (mm)

Width 19 (483) in. (mm)

Depth 13.16 (334) with fans in. (mm)

Weight 9.0 (4) lb s. (kg)

1550 TRANSMITTER

LASER OFFON

STATUS

SELECT

RF TEST

SELECT

CHOO SE ITEMS FR OM

MENU STRUCTURE TO

VIEW/CHANGE.

DISPLAY

HEIRARCHICAL MENU

VIA FR ON T PANEL

STRUCTURE ACCESSIBLE

PUSHBUTTONS. ENABLES

MONITORING AND CONTROL

OF SELECTED PARAMETERS.

KEYSWITCH

CONFORMS TO IEC

SAF ETY STANDARD S;

PROTEC T S USERS

FROM INADVERTENT

EXPOSURE.

LASER LED

INDICATES STATUS

OF SOURCE LASER.

STATUS LED

ENABL ES MO N I T ORING

OF ALL ALARMS AND

WARNINGS;

GREEN , AM BER, RED

UP/DOWN PUSHBUT TONS

ENABLES NAVIGATION

THROUGH MENU AND

PARAME T ER INC REMEN T /

DECREMENT.

RF TEST PORT

REPL ICA OF

INPUT RF SIGNAL.

Opt

FACTORY RS-485 AUX2 AUX1 MIN MAJ

ALARM RFIN

LCD

NC CNO NC CNO NC CNO NC CNO

36 Vdc-60 Vdc

+GND–

94 Vac-245 Vac IN

250 V

2 A

MODEL/SN

IDENTIFYING LABEL

1-1178F

1-1178F.a

4Agere Sy st ems Inc.

Data Sheet

3970-Type 1550 nm Transmi tter October 200 1

Laser Safety Information

Class IIIb Laser Product

FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser

Safety requirements. All versions are Class 3B laser products per IEC ® 60825-1:1993. The device has been

classified with the FDA under an accession number to be determined.

This product complies with 21 CFR 1040.10 and 1040.11.

Single-mode fiber pigtail and connector options (see Ordering Information, Table 4.)

Wavelength = 1500 nm

Maximum power = 30 mW

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

hazardous laser radiation exposure.

DANGER

IN VISIB LE LASER RA DIATION

M a x. O utp ut: 30 m W,

Class IIIb Laser P rodu ct

DANGER

INVISIBLE LASER RADIATION

IS EMITTED FROM THE END

OF FIBER OR CONNECTOR

Avoid direct exposure to beam

Do not view beam directly with

optical instrum en ts

AVOID DIRECT EXPOSURE TO BEAM

Wavelength: 1 .5

INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR

Avoid e xposure to beam

Class 3B Laser Product IEC-60825 19 93 Max. Ou tpu t: 30 mW Wav elen gth: 1 .5

Agere Systems Inc.

Data Sheet

October 2001 3970-Type 1550 nm Transmitter

Ordering Information

* For additional ordering information, please contact an account manager at OPTO West, Agere Systems Inc., 1-800-362-3891 (for sales staff,

please press option 2).

Table 4. Ordering Information

Device Code Description Connector Options Comcode

3970-Type 1550 nm Transmitter FC/APC bulkhead, tight key;

SC/APC bulkhead;

E-2000/APC bulkhead

TBD

Data Sheet

3970-Type 1550 nm Transmi tter October 200 1

Agere Systems 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.

October 2001

DS00-280OPTO-1 (Replaces DS00-280OPTO)

For additional information, contact your Agere Systems Account Manager or the following:

INTERNET: http://www.agere.com

E-MAIL: docmaster@agere.com

N. AM E R ICA: Agere Sy s tems Inc., 555 Union Boulevard, Room 30L-15 P - B A, Allentown, PA 18109 - 3286

1-800-372-2447, FAX 610-712-4106 (In CANA DA: 1-800-553-2448, FAX 610-712-4106)

ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon

Tel. (852) 3129-2000, FAX (852) 3129-2020

CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)

JAPAN: (81) 3-5421-1 600 (Tokyo), KOR EA: ( 82) 2-767-1850 (Seoul), SINGAPO RE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)

EUROPE: Tel. (44) 7000 624624, FAX (44) 1344 488 045

IEC is a registered trademark of The International Electrotechnical Commission.