Wavelength monitor
AssigneeSumitomo Electric Industries, Ltd.
InventorsKatsumi UESAKA, Yutaka ONISHI
Life of this patent
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Abstract
Provided are an optical element and a wavelength monitor capable of detecting a wavelength with high accuracy and at high speed while suppressing a size. The optical element includes: a branch waveguide section configured to branch an input light beam and generate two outputs routed via paths having mutually different optical path lengths; and an optical synthesis section configured to synthesize the two outputs and output two optical signals having different light intensities with regards to a wavelength of the input light beam and exhibiting a mutual phase difference.
Claims7
A wavelength monitor comprising:
- a branch waveguide section configured to branch an input light beam and generate two outputs routed via paths having mutually different optical path lengths;
- an optical synthesis section configured to synthesize the two outputs and output two optical signals having different light intensities with regards to a wavelength of the input light beam and exhibiting a mutual phase difference;
- and
- a first photodiode and a second photodiode that convert the two optical signals from the optical synthesis section to two current signals.
Dependencies are inferred from the claim text.