H. Takara et al., 100GBIT S OPTICAL SIGNAL EYE-DIAGRAM MEASUREMENT WITH OPTICAL-SAMPLING USING ORGANIC NONLINEAR-OPTICAL CRYSTAL/, Electronics Letters, 32(24), 1996, pp. 2256-2258
The eye diagram of a 100 Gbit/s optical signal has been successfully m
easured using sum-frequency-generation optical sampling, which uses an
organic crystal (AANP: 2-adamantylamino-5-nitropyridine) with high op
tical nonlinearity to improve the signal-to-noise ratio of the measure
d waveform. Using this method, a signal-to-noise ratio > 17dB is obtai
ned at a signal peak power of 270mW.