**7. Conclusion**

Fiber grating based sensors and devices are just beginning to tap the vast opportunity for diagnostics to help in therapeutics as indicated by the large number of ongoing research & development activities mentioned in the previous section. They are enabling acquisition of analytical results on the patient's bedside within a few minutes minus the electromagnetic or other interferences. With the development of technology the possibility of cheaper and portable interrogator systems is within reach and the cost of grating fabrication would come down for bulk fabrication. Also, acceptance by the end users will follow only after the researchers are able to prove that this technology is better than the existing ones through

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