In this paper we report on the development of a fiber optic sensor using a new detection method based on the surface-enhanced Raman scattering (SERS) technique. The SERS effect is based on recent experimental observations, which have indicated enhancement of the Raman scattering efficiency by factors up to 108 when a compound is adsorbed on rough metallic surfaces having submicron protrusions. In this report we describe the development of the SERS probes for in situ remote sensing.