Abstract
Novel optical add/drop multiplexers (OADMs) using slanted fiber Bragg gratings (S-FBGs) are proposed. The S-FBGs couple the guided mode to radiation modes, and they also couple specific radiation modes to the guided mode. A set of S-FBGs located near each other function as OADMs. Output light beams from an optical fiber couple to the other fiber by the slanted gratings. The proposed OADM does not require optical circulators that are components of conventional multiplexers using FBGs. Low-cost and small-size optical filters may be constructed. Calculation results successfully show the possibilities of OADMs.
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