Raman spectroscopy provides information about molecular vibrations that can be used for material identification and quantization. The proposed infrared fiber-optic Raman sensor has wide applications to include environmental monitoring, homeland security, life science, matter physics, chemistry and bio-fuel production. It offers a non-destructive, non-contact method of qualitative and quantitative analysis suitable for both laboratories based and plant based applications. Currently, Raman spectrometer serves as an important instrument for Homeland Defense. It can be used for the bulk identification of explosives, chemical warfare agents, and other hazardous chemicals. The proposed rover-mounted infrared fiber-optic Raman sensor will provide NASA a light weight, low-power consumption, versatile, compact, rugged sensing instrument for rapid in-situ field detection of geological materials. It is a new field detection instrument capable of analyzing solid, liquid, and gaseous samples without firmware changes. The instrument proposed here is relevant to the NASA solicitation topic, "Instrument technologies for detecting inorganic and organic biomarkers on future Mars missions." It will directly support NASA for improving existing NASA flight instrument.