10Gbit/s for Next Generation PON with Electronic Equalization using Un-cooled 1.55µm Directly Modulated Laser

: At fixed bias conditions a 10Gb/s self thermally compensated laser with electronic dispersion compensation showed up to 20km reach with 28dB to 25dB power budget between 5° and 80° respectively. C C Moreover, 100km transmission reach is also demonstrated at 35° without penalties. C Introduction It becomes obvious that 10 Gbit/s PON (Passive Optical Network) time division multiplexing solution will be proposed in migration to present G-PON (Gigabit capable-). To satisfy the future demand of low cost 10Gbit/s interface, we investigate the use of un-cooled directly modulated laser [1] inside the 1.55µm wavelength window. The suppression of the cooler and the simplification of laser driver compare to electro-absorption modulated laser attack, could help to reduce transceiver cost and power consumption. In order to achieve this performance, we use a commercial electronic equalization circuit after the optical receiver. We present in this paper a first section where we focus on optical budget performance versus temperature with fixed laser parameters. And a second section presents the results for long reach transmission (over 100km) at 35° without penalties . C Experimental set-up In the experiments we used a Self Thermally Compensated laser. Its design is based on the conjunction of high gain AlGaInAs QW active material and strong positive detuning of the DFB peak from the gain peak which produces efficient Self Thermal Compensation of the laser threshold, power and bandwidth. In order to decrease parasitic RC while keeping low thermal resistance, a low-capacitance SIBH lateral structure was used.