CPC G01M 11/33 (2013.01) [G02B 6/125 (2013.01); G02B 6/2773 (2013.01); G02B 6/34 (2013.01); G02B 2006/12061 (2013.01)] | 10 Claims |
1. An optical device, comprising:
an optical circuit; and
a test circuit optically connected to the optical circuit, wherein
the test circuit comprises:
a test light grating coupler configured to receive test light;
a reference light grating coupler configured to output, as reference light, the test light passed through the test light grating coupler; and
a test light branch coupler connected to an output of the test light grating coupler, and
the test light branch coupler includes:
a first output connected to an input of the optical circuit and configured to branch and output the test light from the test light grating coupler to the optical circuit, and
a second output connected to an input of the reference light grating coupler and configured to branch and output the test light from the test light grating coupler to the reference light grating coupler.
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