FACTOID #53: If you thought Antarctica was inhospitable, think again - its land area is only ninety-eight percent ice. Reassuringly, the other 2% is categorised as "barren rock".
AWG is a crucial waveguide distribute technique in DWDM. The advantage of AWG is its manufacturing process is similar to that of semiconductor, and can be put into mass automated production. Its production method is to amass SiO2 onto the silicon chip, then using abstruse image process and etching method defining array wave guide, finally adding a protection layer. The principal of AWG is using the physical characteristics of wave guide to distribute different light waves, this technology can distribute many optical channels.
AWG was invented by Dr. Tony Hsu at AT&T Bell Labs. in 1989.
For example, one end can be a cluster of optical fibers in a hexagonal array and the other end could be a linear array of the same fibers or multiple branches of individual fibers.
For each mode in an optical waveguide, the term used to describe the process by which an electromagnetic signal is distorted by virtue of the dependence of the phase and group velocities on wavelength as a consequence of the geometric properties of the waveguide.
A diffraction grating and a focusing mirror are used to combine two or more optical fiber outputs (differing wavelengths) onto a single fiber.
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