For the first time, to the best of our knowledge, designed and fabricated is an extreme temperature optical sensor using a single crystal Silicon Carbide (SiC) optical chip packaged within a sintered SiC hollow tube. The fabricated assembly forms the critical frontend probe of the proposed hybrid wireless-wired optical sensor used for measuring >1000 oC temperatures within hot gas chambers such as in coal-fired power generation systems. Initial probe test experiments show the required water-tight chip-end probe sealing and the desired retro-reflected optical interferograms required for temperature-based signal processing.For the first time, to the best of our knowledge, designed and fabricated is an extreme temperature optical sensor using a single crystal Silicon Carbide (SiC) optical chip packaged within a sintered SiC hollow tube. The fabricated assembly forms the critical frontend probe of the proposed hybrid wireless-wired optical sensor used for measuring >1000 oC temperatures within hot gas chambers such as in coal-fired power generation systems. Initial probe test experiments show the required water-tight chip-end probe sealing and the desired retro-reflected optical interferograms required for temperature-based signal processing.