Abstract-Uncooled 2.5-Gb/s directly modulated lasers are used to demonstrate a coarse wavelength-division-multiplexed (CWDM) transmission capacity of 160 Gb/s. All 16 CWDM channels, modulated at 10 Gb/s, are simultaneously transmitted over 40 km of uncompensated low-water-peak nonzero dispersion fiber.Operation with bit-error ratio BER 1 9 is demonstrated for all 16 channels from room temperature to at least 65 C.Index Terms-Coarse wavelength-division multiplexing (CWDM), metro transmission, uncooled lasers.
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