CATV Fiber Optic Transmitter w/ Customer Specified ITU Wavelength

The MX- T8500T-HP Series 1550nm (with customer specified ITU Wavelength) High Performance Externally Modulated Optical Transmitters are a dual optical output transmitter designed for analog and digital CATV QAM signals. Maxcom’s 1550nm optical amplifiers adopt world class pump lasers and American OFS erbium-doped optical fiber components. Units provide excellent APC, ACC and ATC control, superb design in the ventilation and heat-dissipation which ensure long life and a highly reliable operation of the pump laser.

Our 1550nm externally modulated technology for the optical transmitter has no laser chirp, low dispersion distortion, and a large extinction ratio, with excellent characteristics within 40~862MHz (Available to 1000 MHz). The External Modulator does not generate CSO distortion after reasonable bias. It can be followed by an EDFA when used in a large coverage area and very-long trunk and local networks. Adopting WDM, multi-wavelength optical channels can be added and transmitted through one fiber, complimenting current developments and trends relative to triple-play and fiber to home.

The units optical source adopts narrow line width (Typ.=0.35MHz), low noise and continuous wave DFB laser, which is propitious to reduce the dispersion effect. Adopting ITU standard wavelength, users can select the DWDM wavelength ITU-TG.692 standard wavelength ±200GHz (±1.6nm) as ±0.05nm stepping. The MXT8500T transmitter can achieve a high index of back to back CNR ≥ 53.5dB, CTB ≤ -65dB, CSO ≤ -65dB, SBS: 13~19dBm continuous adjustable. The unit is equipped with a RS232 communication interface, SNMP network management, 1+1 back-up power supply , hot-plug function available, chassis temperature is auto-control. Units are equipped with dual fiber outputs.

The LCD at the front panel offers equipment status and warning alarms. The laser will switch off automatically if optical power is lost, which offers security protection for the laser.

When combined with EDFA optical amplifiers, the MX-T8500T-HC allows system operators to cost-effectively transport a full slate of wideband video and data services over very long distances, or alternatively allows them to distribute signals to many remote optical receiver/node location. It is also designed to operate seamlessly with optical transmitters, receivers and nodes from most leading manufacturers.

The MX-T8500T-HP, an advanced type externally modulated optical transmitter with high index, high reliability and excellent cost performance, is applicable for primary links and distribution network links in large and long distance CATV systems, head-end, hubs and OTN’s.