Optical f iber methane sensor based on SAN f ilm containing cryptophane E (OEt)6

A novel long-period fiber grating (LPFG) film methane sensor is designed and applied successfully. The sensor is constructed by depositing a thin styrene-acrylonitrile (SAN) film containing the new compound cryptophane-E-(OEt)6 onto the cladding surface of the LPFG. This film is sensitive to methane