We review recent advances in development of fibre grating based optical biosensor devices and applications. The emphases will be on novel grating structures UV-inscribed in D-shape, single and multi mode, and multicore fibres and their post-sensitisation by HF- etching technique. Some of these devices have been used to detect concentration of Hemoglobin protein in sugar solution, showing a sensitivity as high as 20nm/1%.

© 2006 Optical Society of America

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