Complex sentence: For ICLs grown on GaSb, the separate confinement layers are typically low-doped GaSb while the optical cladding layers are InAs/AlSb superlattices lattice-matched to the GaSb substrate.
Split into simpler sentences: For ICLs grown on GaSb substrates, low-doped GaSb separate confinement layers are used and InAs/AlSb superlattices are used for optical cladding. The InAs/AlSb superlattices are lattice-matched to the GaSb substrate.