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Silicon-photonic hybrid ring-filter external cavity (SHREC) tunable lasers fabricated by passive alignment techniques are demonstrated. High power, narrow linewidth and highly reliable characteristics are achieved thanks to drastically reduced losses in the laser cavity toward commercialization.
Silica-LiNbO3 hybrid integration has opened up the possibility of synthesizing advanced transmitters, including dual-carrier 16 QAM modulators and flexible-format modulators. They can provide the best mix of optics and electronics, and are the key to future optical transport systems.
We demonstrated spectrally efficient (2-b/s/Hz) 1Tb/s DWDM transmission of 111 Gb/s no-guard-interval PDM CO-OFDM signals over DSFs with 50 GHz spacing. The record transmission distance of 2100 km in the 100-Gb/s-data-rate CO-OFDM systems was achieved.
The capability of 2.64 Tbit/s (132 ch./spl times/20 Gbit/s) WDM transmission over 120 km single mode fibre (SMF) is experimentally demonstrated. High density WDM signal with 0.6 bit/s/Hz spectrum efficiency is produced by optical duobinary coding.
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