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公开(公告)号：US20190154738A1
公开(公告)日：2019-05-23
申请号：US16253755
申请日：2019-01-22
Applicant: ABB Schweiz AG
Inventor： Klaus Bohnert , Andreas Frank , Yang Lin , Xun Gu , Georg Müeller
Abstract: The optical interferometric sensor device comprises an integrated beam splitter having a first facet and a second facet with optical ports arranged therein. On the beam splitter, the beam splitting junctions as well as the optoelectronics-side ports and the sensing-side port are arranged with a mutual displacement along the direction of the first facet. This displacement reduces undesired interference effects caused by stray light. Also, a quarter-wave retarder is provided in a recess of the beam splitter with layers of soft adhesive adjacent to it in order to reduce stress.
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