The present invention relates to embodiments of: (1) a unitary holographic
drive head assembly mounting structure; (2) an assembly comprising a
unitary holographic drive head assembly mounting structure and a
plurality of holographic drive head components and/or subassemblies; (3)
a subassembly comprising a spatial light modulator, detector array, and a
beam splitter; (4) a device comprising a spatial light modulator and a
physical aperture positioned over or an imaged aperture projected onto
the photoactive area of the spatial light modulator; (5) a system for
optically aligning or pointing a laser in a holographic drive head
assembly; (6) a light source subassembly comprising a laser, a fiber
coupling lens; and an optical fiber having a fiber connector ready output
end; and (7) a light source subsystem comprising a laser source, beam
conditioning optics, fiber coupling optics for receiving the conditioned
light beam, and a fiber optic connector for receiving the conditioned
light beam from the fiber coupling optics.