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We present measurements and simulations of the improvement due to electronic signal processing on 10 Gbit/s directly modulated lasers. MLSE algorithms with strong FEC can enable reaches in excess of 300 km NDSF without optical dispersion compensation.
We report a novel architecture for the design of DWDM comb filters based on planar echelle gratings. Two 100-GHz-period comb filters were realized yielding Gaussian and flat-top spectral responses with high extinction ratios.
An uncooled 1.3 micron directly modulated DFB laser is used to transmit 40 Gb/s multi-level data over 40 km of standard fibre. A semiconductor optical amplifier is used to overcome fibre loss and enhance transmission distance.
Advanced 14xx-nm-pump-lasers are reviewed for next generation optical fiber amplifiers. Hybrid-pump with ultra high power and low-DOP, uncooled pump for submarine system, and inner-grating-multi-mode-laser (IGM-laser) with ultra low noise and reduced stimulated-Brillouin-scattering are described.
We demonstrate record wavelength span from an 8-channel WDM VCSEL array operating CW to 65/spl deg/C from 1470 to 1610 nm with precise 20-nm channel spacing. Devices are fabricated using nonplanar wafer bonding and fully-oxidized DBRs.
We report on a sampled grating DBR laser monolithically integrated with a Mach-Zehnder modulator and a semiconductor optical amplifier. Transmission over 100 km of standard fiber at 10 Gb/s is demonstrated across 30 nm tuning range.
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