Biomedical optical imaging, including optical coherence tomography, hyperspectral imaging, and confocal and super-resolution microscopy, is flourishing. Dedicated fused fiber couplers, such as photonic lanterns, enable us to advance these techniques by improving resolution, depth of penetration, and contrast. In this presentation, Boudoux will discuss novel fiber optics assemblies, such as double-clad fiber couplers, multimode circulators, and mode-specific photonic lanterns, developed at Polytechnique Montréal and Castor Optics, and show how they enhance image quality and sensing performance.