3970-Type 1550 nm Transmitter

Data Sheet

October 2001

Features

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Extremely fast time to market and very low engi-

neering investment

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Superior CNR, CSO, and CTB performance on two

high-power optical outputs

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Mobile field-tuning application provides real-time

performance optimization

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High SBS suppression capabilities enhance archi-

tectural options and coverage

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Multiple programmable tuning optimizations per

transmitter facilitate inventory management and

performance across architectures

Applications

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High-performance supertrunking links

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High-launch power distribution networks

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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 way,

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.