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We demonstrate combined wavelength- and mode-multiplexed transmission with a spectral efficiency of 58 b/s/Hz over an 87-km single-span multi-mode fiber using 16-QAM modulation format. The hybrid fiber span comprises 10- and 15-mode fibers.
We demonstrate transmission of trellis-coded-modulated-12-spatial-and-polarization modes over 40km 6-LP-mode fiber with low differential mode group delay. By employing 8-PSK trellis coded modulation, an OSNR gain of 1.8dB is observed in comparison to QPSK.
10 spatial mode transmission over 40km multi-mode fiber (50μm core diameter) with low DMGD is demonstrated using low-loss all-fiber 10-port photonic lanterns and 20×20 multiple-input multiple-output time-domain equalizer. A maximum MDL of 4.5dB is observed.
We demonstrate combined wavelength- and mode-multiplexed transmission over a 125-km multimode single span composed of 10- and 15-mode fibers with a spectral efficiency of 29 b/s/Hz. A transmission capacity of 115.2 Tb/s is achieved over a distance of 87 km.
We demonstrate the first analog fiber-optic link using high-order modes in FMFs to improve SFDR and reduce WDM penalties due to fiber nonlinearities. An 8-dB SFDR improvement and a 15-dB nonlinear crosstalk suppression were achieved.
We demonstrate the first integrated 5-mode passive optical network, utilizing spatial modes to eliminate upstream combining loss. BERs of less than 10−9 were obtained for all 5 modes enabling Ethernet transmission using commercial GPON equipment without packet loss.
Wavelength and mode-division multiplexed 4.45 km low-DMGD (0.05ns/km) 6-LP mode fibre transmission employing low-loss all-fibre 10-port photonic lanterns is demonstrated using a 20×20 multiple input multiple-output time-domain equalizer. We measured an MDL of 8.7± 1.7dB over 10 hours.
We fabricate ten- and fifteen-mode photonic lanterns by using microstructured preforms that enables a repeatable fabrication process and scalability to large number of modes. Mode selective capability is demonstrated by independently exciting individual LP mode.
Low-loss all-fiber mode selective photonic-lanterns capable of exciting six spatial fiber modes (4 LP modes) are demonstrated. Mode field profile characterization of photonic lanterns using both step and graded index fibers is presented.
We demonstrate the first few-mode-fiber based passive optical network, effectively utilizing mode multiplexing to eliminate combining loss for upstream traffic. Error-free performance has been achieved for 20-km 3-mode transmission in a commercial GPON system carrying live Ethernet traffic.
We demonstrate an optically activated all-fiber polarization rotator based on polymer-azobenzene complexes. The azo compound (Disperse Red 1) was incorporated into a polymeric matrix (PDMS) using the guest-host technique and the resulting azopolymer was used as coating for tapered fiber devices. These photosensitive devices were then integrated in a fiber ring laser cavity, and the optically induced...
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