T. M. Libish,M. C. Bobby,Linesh J.,Mathew S.,Pradeep C.,V. P. N. Nampoori,Radhakrishnan P..Refractive index and temperature dependent displacements of resonant peaks of long period grating inscribed in hydrogen loaded SMF-28 fiber[J].Optoelectronics Letters,2012,8(2):101-104 Refractive index and temperature dependent displacements of resonant peaks of long period grating inscribed in hydrogen loaded SMF-28 fiber Author Name Affiliation T. M. Libish  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India；S.C.T. College of Engineering, Trivandrum 695018, India  M. C. Bobby  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  Linesh J.  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  Mathew S.  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  Pradeep C.  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  V. P. N. Nampoori  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  Radhakrishnan P.  International School of Photonics, Cochin University of Science and Technology, Cochin 682022, India  Abstract:       In this paper, the effects of refractive index (RI) of surrounding medium and ambient temperature on the transmission characteristics of a long period grating (LPG) are experimentally analyzed. The spectral behavior of LPG is investigated when the ambient index is higher or lower than that of the cladding material. The results show that the refractive index sensitivity of lower order attenuation bands is very low compared with that of the highest order attenuation band. But in the case of temperature, the lower order attenuation bands of the LPG can also exhibit good sensitivity like the higher-order bands. Hits: 4209 Download times: 662 View Full Text    Download reader