描述 Description

The A1750A laser module is a dense wavelengthdivision multiplexing laser with a DFB chip designed specifically for analog RF applications. The device features low adiabatic chirp to maximize signal quality in short and long lengths of fiber. The laser’s excellent inherent linearity minimizes degradation of the broadcast signals caused by the QAM channels. Wavelength-division multiplexing (WDM) has gained widespread acceptance in the telecommunications market and is being designed into emerging cable television network architectures. Dense WDM, a method for delivering targeted QAM signals to different locations, allows multiple signal sets to be combined onto a single strand of fiber for transmission from a headend to a hub. At the hub, individual QAM signals can be selected and combined with broadcast analog channels. The A1750A DWDM laser module reduces cable network architecture fiber requirements and lessen equipment requirements in the hub. The A1750A is available at a variety of standard ITU wavelengths. The lasers are offered as either forward-path (40 MHz–860 MHz) or return-path modules (5 MHz–210 MHz).

特性 Features

■ Low adiabatic chirp

■ Excellent linearity

■ Standard ITU wavelengths

■ Advanced analog chip design

■ Tested for forward-path or return-path applications

■ Reduces equipment requirements in the hub

■ Exceeds Telcordia Technologies* 468 specification.

Applications

■ Networks with limited fiber

■ Architectures using separate optical wavelengths to carry targeted services