WAVELENGTH MONITOR

摘要

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.

主权项

1. 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.