Abstract
We have measured the signal-to-noise ratio (SNR) of a 2.5-Gb/s spectrum-sliced incoherent light channel in the large beat-noise limit. SNR changes strongly in time depending on the receiver electrical filter and the extinction ratio. Except for some minor differences, the SNR behaved quite similar to the theory. In order to obtain a high SNR, the nonreturn-to-zero format should be used rather than the return-to-zero format and the receiver sampling time should be chosen more precisely than that of conventional receivers.
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