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Two time-resolved experimental methods have been used for characterization of the non-linear optical response of chalcogenide glasses of the system As-S-Se-Te in IR and THz ranges upon excitation by femtosecond laser pulses at 800 nm wavelength. Photoinduced conductivity and refractivity were studied by using a rate equation model.
Mode division multiplexing of modes in a silicon waveguide supporting three optical modes is demonstrated in the silicon on insulator platform. Cross-talk suppression of 17dB and 12dB are obtained for the zeroth and second order modes respectively. The extinction bandwidth is observed to increase with the mode order indicating a stronger cross coupling coefficient as the mode order is increased. The...
We present a laser-spectroscopic method for continuous and simultaneous interrogation of multiple passive gas sensor nodes in a fiber based sensor network. Enabled by chirped laser dispersion spectroscopy, methane leak detection is demonstrated as an example application.
The formation of poly(acrylic acid), PAA, -anchored polyelectrolyte multilayers on an optical fibre long period grating (LPG) by the layer-by-layer (LbL) assembly technique for highly sensitive ammonia gas detection is reported. PAA could act as a receptor for binding of amine compounds, especially ammonia, which would induce changes in the coating properties such as optical thickness (OT), film thickness/density...
We report 16.2-Tb/s transmission over 32×79.1-km spans of field fiber using optical superchannels with DP-QPSK modulated subcarriers. The achieved capacity-distance product of 40.9-Pb/s-km is the highest reported to date for a field trial.
Broadband emissions centered at 560 nm, 770 nm, and 1380 nm from glass-clad crystal fibers with 3-dB bandwidths of 98, 180, and 240 nm were used for various biomedical and in-vivo optical tomography applications with micrometer in resolution.
All-optical up-conversion based on dual-pump four-wave mixing (FWM) in 2-m Bismuth Oxide-based fiber for 10-Gb/s OOK wireless signals in 60-GHz ROF systems has been experimentally demonstrated for the first time.
We introduce a technique to monitor the polarization dependent impairments in optical links at tens of MHz speeds. Experimentally, we capture up to 10 ps PMD values for 5.8-nm optical bandwidth at 36 MHz refresh rates.
A super broadband OFDM-radio-over-fibre system with a record bandwidth of 16 Gbit/s to transmit over both 20 km SMF-28 and wireless distance of over 6 m has been experimentally demonstrated.
8 times 11.5 Gbit/s (10 Gbit/s after coding) optical OFDM transmission over 1000 km standard single mode fibre (SSMF) with conventional distributed feedback (DFB) lasers and direct-detection is demonstrated. Compared with coherent-detection using external cavity lasers (ECL), DFB lasers and direct-detection can significantly reduce the system complexity and cost.
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