EMCORE unveils new 1550-nm directly modulated CATV transmitter

Optical component and subsystem supplier EMCORE Corp. (NASDAQ:EMKR) has introduced the Medallion 8000 Series 1550 nm Directly Modulated DWDM Cable Television (CATV) Transmitter. The new 1550-nm CATV fiber-optic transmitter serves wideband applications that require both CATV and Satellite-Intermediate Frequency (SAT-IF) signals to be transmitted over fiber cable runs of up to 30 km.

The dual-use capabilities of the transmitter supports network architectures that require a single transmitter to carry multiple signals, which lowers costs, system complexity, and rack space requirements, EMCORE says.

The Medallion 8000 supports 79-channel NTSC analog signals and/or a combination of QAM and SAT-IF signals with a reduced number of CATV analog channels. It supports four fixed fiber length options -- 0-10 km, 5-15 km, 10-20 km, and 15-25 km -- with a maximum of 18 dBm Stimulated Brillouin Scattering (SBS) suppression.

The device also can be purchased with a selectable fiber length option that enables the user to set the transmitter for optimized composite second order (CSO) distortions at lengths from 0 to 30 km in 1-km increments. It has a maximum SBS suppression of 20 dBm.

The 75-ohm CATV RF video input supports frequencies up to 1002 MHz. Other design features include low chirp control, noise suppression circuitry, and patented pre-distortion technology for high performance with EMCORE's range of cooled broadband directly modulated lasers. A second 75-ohm RF input supports frequencies up to 2700 MHz for fiber-to-the-premises (FTTP), SAT-IF, and wireless applications.

Monitoring and configuration of the Medallion 8000 is supported by EMCORE's latest Web GUI, Telnet, and Simple Network Management Protocol (SNMP) software via a front-panel display, RS-232 port, and Ethernet port.

"The new Medallion 8000 directly modulated transmitter family builds on the strengths of our popular Medallion 6000 externally modulated series and augments our offering for concurrent transmission of CATV and SAT-IF signals over fiber," said Jaime Reloj, vice president of business development for EMCORE. "Network providers are demanding high-quality, economical delivery of video to their customers, while extending capacity and improving network management intelligence. The Medallion 8000 series transmitters are ideal for extending traditional hybrid fiber coaxial CATV systems, for RF overlay for FTTP, and for RFoG (RF over glass) projects in countries around the world."

Dual-redundant field-replaceable fans and power supplies are standard.

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