Optical components, bulk optical components and integrated optical components, namely semiconductor waveguides, multiplexers, demultiplexers, amplifiers, gain equalizers, and attenuators; optical wave guide components, namely multiplexers, demultiplexers, amplifiers, gain equalizers, and attenuators; miniaturized optical components, namely waveguides, multiplexers, demultiplexers, amplifiers, gain equalizers, and attenuators; and optical systems containing optical components, namely waveguides, multiplexers, demultiplexers, amplifiers, gain equalizers, and attenuators
Electrical and Scientific Apparatus