OBJECTIVES: THE GOAL OF THIS PROJECT IS TO ADVANCE AND MATURE A NEW TYPE OF MINIATURE INTERFEROMETER BASED RAMAN SPECTROMETER THE SPATIAL HETERODYNE RAMAN SPECTROMETER (SHRS) THAT WE DEVELOPED WITH PREVIOUS PICASSO FUNDING. THE SHRS WILL BE BROUGHT TO TRL 3 BY BUILDING A PROOF OF CONCEPT MODEL USING MONOLITHIC OPTICAL CONSTRUCTION TECHNIQUES TO PROVIDE MINIATURIZATION ROBUSTNESS AND HIGH SPECTRAL PERFORMANCE. RAMAN SPECTROSCOPY IS POTENTIALLY A POWERFUL TOOL FOR PLANETARY EXPLORATION AND THREE INSTRUMENTS ARE PLANNED FOR UPCOMING MARS MISSIONS. BUT CONVENTIONAL RAMAN SYSTEMS ARE LARGE HEAVY AND FRAGILE AND EXPENSIVE TO ENGINEER FOR PLANETARY APPLICATIONS. THE PROPOSED MONOLITHIC SHRS (MSHRS) IS SMALLER LIGHTER AND MORE ROBUST THAN CONVENTIONAL RAMAN SPECTROMETERS AND HAS BETTER SENSITIVITY LARGER SPECTRAL RANGE AND A MUCH LARGER FIELD OF VIEW MAKING IT MORE SENSITIVE AND EASIER TO ENGINEER EXPANDING PLANETARY APPLICATIONS. IN THE PROPOSED PROJECT WE WILL BUILD ON THE SHRS THAT WE PREVIOUSLY BROUGHT TO BETWEEN TRL 2 AND TRL 3.SOME OF THE PROPOSED CHANGES LOWER THE OVERALL TRL TO 2 BUT WE WILL ADVANCE THIS TECHNOLOGY TO TRL3 AT THE END OF THIS WORK. WE WILL ADVANCE THE TECHNOLOGY BY MOVING TO A MONOLITHIC INTEGRATED OPTIC DESIGN (MSHRS) WHERE ALL OPTICAL COMPONENTS OF THE SHRS ARE DIRECTLY BONDED TO EACH OTHER IN A VERY SMALL SOLID-STATE PACKAGE WITH NO MOVING PARTS. MONOLITHIC CONSTRUCTION MAKES THE SYSTEM VERY ROBUST TO VIBRATIONS AND SHOCK AND ALLOWS A MUCH SMALLER SPECTROMETER TO BE CONSTRUCTED BECAUSE THERE ARE NO SUPPORTING ELEMENTS. THE UNPRECEDENTEDLY SMALL SIZE AND HIGH SENSITIVITY OF THE MSHRS WILL ALLOW ITS USE IN SMALLER SPACECRAFT LIKE CUBESATS AND WILL ALLOW MULTIPLE SPECTROMETERS TO BE FLOWN IN A SINGLE SMALL SPACECRAFT GREATLY EXPANDING THE AMOUNT OF INFORMATION THAT CAN BE GATHERED AND INCREASING ANALYSIS THROUGHPUT. THE PROPOSED MSHRS RAMAN SPECTROMETER WILL BE SMALL ENOUGH TO FIT IN A 1U PLANETARY CUBESAT FOR STANDOFF RAMAN OR IN A 25-MM DIAMETER BOREHOLE FOR IN-SITU MINERALOGY AND HIGH RESOLUTION SPATIAL MAPPING.