Stable recoated fiber bragg grating

摘要

A sprayable coating composition for a bare portion of an optical fiber that includes a refractive index grating having a characteristic wavelength response. A coating composition comprises a curable composition having a viscosity from about 0.05 Pa-sec to about 0.30 Pa-sec for spray application to cover the bare portion of the optical fiber, to protect the refractive index grating. A photoinitiator reacts with actinic radiation in the presence of oxygen to cure the curable composition covering the bare portion of the optical fiber. The characteristic wavelength response of the grating exhibits substantially linear variation between a lower limit of temperature and an upper limit of temperature when the curable composition has a glass transition temperature either above the upper limit of temperature or less than about 30° C. above the lower limit of temperature.