Cladding-wave Devices for Application in Optical Communication and Sensing

Project: Research

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In the conventional application of an optical fibre, light is launched into the core and shielded from the surroundings to ensure stable signal transmission. With a long-period grating (LPG), however, light can be transferred from the core to the cladding. Although LPGs are widely used as wavelength filters, the principal investigator of this project sees them as effective components to couple light between the core and the cladding. With the light propagating in the cladding, one can modify its properties through changing the surroundings before coupling it back to the core. Manipulation of the cladding waves of a fibre or waveguide, therefore, opens up new possibilities for the development of useful optical devices. With the support of RGC-funded projects over the years, the principal investigator has established facilities for the fabrication of LPGs in fibres and waveguides, and demonstrated many new LPG filters. This project capitalizes on these successes with the objective of demonstrating a range of innovative cladding-wave devices for application in optical communication and sensing, which include cladding-wave attenuators, cladding-wave resonators, and surface-plasma-wave couplers. These devices can expand substantially the functions of existing fibre and waveguide devices and have the potential to be manufactured at a low cost.


Project number9041224
Grant typeGRF
Effective start/end date1/10/077/12/10