公开(公告)号：US20210364703A1

公开(公告)日：2021-11-25

申请号：US17129252

申请日：2020-12-21

Applicant: Lumentum Operations LLC

Inventor： Barthelemy FONDEUR ,  Hiroaki YAMADA ,  Jiamin ZHENG

IPC: G02B6/293 ,  G02F1/21

Abstract: In some implementations, a Mach-Zehnder interferometer (MZI) includes a delay line arm formed in a chip and a mirrored facet formed in the chip. The delay line arm may be configured to propagate light to the mirrored facet. The mirrored facet may be configured to reflect, to the delay line arm, a percentage of the light propagated to the mirrored facet by the delay line arm.

公开(公告)号：US20190227402A1

公开(公告)日：2019-07-25

申请号：US16116277

申请日：2018-08-29

Applicant: Lumentum Operations LLC

Inventor： Hiroaki YAMADA

IPC: G02F1/225

Abstract: An optical device may include a waveguide-based Mach-Zehnder (MZ) interferometer associated with performing polarization multiplexing or demultiplexing. The waveguide-based MZ interferomenter may include a first MZ arm, a second MZ arm, and a set of stress-balancing trenches. A portion of the first MZ arm may be between at least two stress-reducing trenches of a plurality of stress-reducing trenches. The plurality of stress-reducing trenches may be in a cladding layer on a substrate. The set of stress-balancing trenches may be on an opposite side of the second MZ arm from the plurality of stress-reducing trenches. The set of stress-balancing trenches may be in the cladding layer on the substrate.