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> Nortel LCM155EW dfb laser w/ mach zehnder modulator
Nortel LCM155EW dfb laser w/ mach zehnder modulator
Nortel 10 Gb/s InP Mach Zehnder Modulator with DWDM Laser
The 10 Gb/s InP Mach Zehnder Modulator with DWDM Laser, containing the Bookham Technology Strained Layer MQW DFB laser chip and the InP Mach-Zehnder modulator chip, has been designed specifically for use in 10 Gb/s long distance optical fibre trunk systems. Thermo-electric heatpumps, a precision NTC thermistor and optical isolator are incorporated. By using the rear back facet monitors, the integrated Etalon locker allows wavelength locking to the 50 GHz ITU grid. The module is capable of >80 km transmission over Non Dispersion-Shifted Fibre (NDSF) without additional dispersion compensation. This is achieved by the negative chirp characteristic, which compensates for 1500 ps/nm dispersion. Increased transmission distances are possible using multiple spans of NDSF with dispersion compensation. Optical power control is achieved by applying a D.C. bias voltage to the internal attenuator electrode. This reduces the power into the modulator section without affecting the operating wavelength.
Features · Voltage programmable output power control · Long haul performance with negligible penalty · Integral Etalon wavelength stabilisation to within ± 20 pm over life · Differential or single 50 Ohm low voltage drive modulation input · Integral thermo-electric cooler with precision NTC thermistor for temperature control · Hermetically sealed butterfly style package with SMA RF connectors · ITU Wavelengths available from 1527 nm to 1608 nm · 50 GHz channel spacing
Applications · Long reach SONET/SDH OC192/STM64 DWDM systems to 50 GHz channel spacing
