The low-cost Olson OTOT-EM55X 1550nm Externally Modulated CATV Optical Transmitter uses a low-noise, narrow bandwidth, CW laser as a light source. The external modulator amplitude modulates the light, allowing the transmitter to eliminate the chirp associated with 1550nm direct modulation lasers. Ideal for FTTx networks (Up to 60km typical) and other multipoint distribution networks. The OTOT-EM55X provides wide bandwidth from 47MHz to 862MHz. It also offers superb stability over the full operating temperature range from 0°C to +50°C.
Direct modulation 1550nm CATV transmitters suffer from the effects of dispersion that can occur even in modest length fiber runs (10-20km). The key degradation is CSO caused by the laser chirp. In networks using an EDFA, the output fiber optical launch power must also be closely regulated to avoid performance degradation of due to SBS. Olson’s Externally Modulated CATV transmitter can compensate for these types of distortion, allowing for high quality signal transmission of multiple CATV channels for distances up to 60km or more.
The OTOT-EM55X fixed SBS suppression allows up to +16.5dBm of light to be launched into a fiber with none of the deleterious effects of the SBS nonlinearity.
The transmitter is enclosed in a 19" wide, 1RU rack chassis for using in a standard EIA 19" rack. Front panel controls and a LCD display allow the user to quickly monitor and control system parameters. Optical connectors are SC/APC standard, with an option for FC/APC connectors. Single AC and DC power supply options are available.