Osha Liang LLP
Optical multiplexer/demultiplexer
Light of wavelengths λ2 and λ3 (λ2<λ3) is propagated in a first core. The light emitted form the first core is divided at a filter. That is, the light of the wavelength λ2 transmits through the filter and is made incident onto a third core while the light of the wavelength λ3 is reflected from a filter and is made incident onto a second core. The second core has a sectional area which works in a single mode for the light of the wavelength λ3 and works in a multiple mode for the light of the wavelength λ2. It is therefore possible to prevent noise or stray light in an optical multiplexer/demultiplexer.
OMRON Corporation
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Yukari Toshinari Hayami
Terakawa Mori Hosokawa