Optical wavelength division multiplexing transmitter
AssigneeHitachi Cable, Ltd.
InventorsRyuta Takahashi, Koji Kumagai, Akihiro Hiruta
Life of this patent
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Abstract
An optical transmitter for coupling and wavelength-multiplexing optical signals with a different wavelength has 3 or more light sources for emitting parallel optical signals with a different wavelength, and 2 kinds of optical components with a different optical signal reflectance arranged in an optical path of each light source for coupling into one the optical signals emitted from the light sources respectively. The reflectance or transmittance of each of the 2 kinds of optical components is set so that each optical signal has the same optical signal power when reflected off or transmitted through the optical components for being coupled together and output from the optical transmitter.
Claims12
An optical transmitter for coupling and wavelength-multiplexing optical signals, each with a different wavelength, comprising:
- 3 or more light sources for emitting parallel optical signals, each with a different wavelength;
- and
- a plurality of optical components including only 2 kinds of optical components, each with a different optical signal reflectance, wherein the plurality of the optical components are configured such that at least one of the 2 kinds of the optical components with the different optical signal reflectances is arranged in an optical path of each light source for coupling to one of the optical signals emitted from another of the light sources,
- wherein the reflectance or transmittance of each of the 2 kinds of optical components is set so that each optical signal has the same optical signal power when reflected off or transmitted through the optical components to be coupled together and output from the optical transmitter.
Dependencies are inferred from the claim text.