In the laser source of the multi-channel optical communication system, coupling is relatively difficult, and devices such as array lenses, optical fiber (waveguide) arrays, optical multiplexers and optical coupling switches are required. APEquamm's array lens is an ideal optical solution. It is made of synthetic fused silica. It only needs a single piece. It has very high reliability and avoids the use of polymers or epoxy resins in the optical path. At the same time, unlike polymer or epoxy lenses, fused silica lenses have very low insertion loss and high coupling efficiency, and the characteristic drift due to temperature changes is extremely small.