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160-Gb/s optical sampling by gain-transparent four-wave mixing in a semiconductor optical amplifier

: Diez, S.; Ludwig, R.; Schmidt, C.; Feiste, U.; Weber, H.G.


IEEE Photonics Technology Letters 11 (1999), No.11, pp.1402-4
ISSN: 1041-1135
Journal Article
Fraunhofer HHI ()
multiwave mixing; optical communication equipment; optical modulation; optical switches; semiconductor optical amplifiers; signal resolution; signal sampling; optical sampling; gain-transparent four-wave mixing; semiconductor optical amplifier; broad-band all-optical switch; switching principle; control pulse trains; gain wavelength region; index modulations; data signal; temporal resolution; 1300 nm; 1550 nm; 160 Gbit/s

We report on a broad-band all-optical switch that exhibits high linearity (>30 dB), high switching contrast (>25 dB), and large data wavelength tunability (100 nm). The switching principle is based on four-wave mixing. Two control pulse trains are placed in the gain wavelength region of a 1300-nm semiconductor-optical amplifier. The data signal, however, is at 1550 nm in the transparent wavelength region where four-wave mixing sidebands are generated due to index modulations. The switch is used to sample a 160-Gb/s data signal with a temporal resolution of approximately 1.7 ps.