Laser Transmitter Module - for OCMR

About the Product

The Light Link® Series 3 CATV laser transmitter module has been designed to provide the OCM system with 1550 nm wavelength range DWDM capability. The transmitter employs a high performance, thermally stabilised DFB low-chirp isolated laser to transmit AM-VSB CATV or DVB-QAM signals on one ITU frequency grid optical wavelength within the 1550 nm range.

The LTM15 suits single mode optical fibres with or without dense wavelength division multiplexing (DWDM). The transmitter can be used with erbium doped fibre amplifiers (EDFA or EDFAM) in short haul fibre-to-the-home (FTTH) applications with a maximum of up to 10 km of normal fibre, or up to 30 km on fibres with 1550 nm low dispersion.

Light Link® Series 3 optical transmitters incorporate a comprehensive alarm and status monitoring system of all laser operating parameters such as DC laser bias current, cooler current and optical output power. These parameters are available for either local or remote-site monitoring.

Control features include laser shut down and manual or automatic gain control, which is controlled via the front panel keypad on the OCM user interface or managed remotely using the OCM network management system, NMS3.

Features

• Plug and play OCM module.
• Analogue InGaAsP DFB low-chirp laser with optical isolator and thermoelectric cooler.
• CENELEC and NTSC standards up to 110 channels (both analogue and digital).
• Available in most ITU optical frequency grid wavelengths for DWDM applications.
• Remote laser monitoring and shutdown facilities via module status port and network management system.
• Local laser shutdown via OCM user interface and through module status port.
• Alarm monitoring via module status port and network management system.
• Automatic gain control for constant optical modulation index (OMI).
• Automatic Peltier thermo-cooler control for constant laser temperature.
• Automatic laser power control for constant optical output.
• Integrated 4.5 MHz pilot carrier generator for return path models.