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1. (WO2018177061) OPTICAL PHASE SHIFTER, OPTICAL INTERFEROMETER BASED THEREUPON, AND METHOD OF MANUFACTURE THEREOF

Pub. No.:    WO/2018/177061    International Application No.:    PCT/CN2018/077468
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Mar 01 00:59:59 CET 2018
IPC: G02B 6/12
G02F 1/025
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: JIANG, Jia
Title: OPTICAL PHASE SHIFTER, OPTICAL INTERFEROMETER BASED THEREUPON, AND METHOD OF MANUFACTURE THEREOF
Abstract:
A phase shifting optical device and method of manufacture is provided. In an embodiment, the phase shifting optical device may include a first arm defining a first arm optical path, a second arm defining a second arm optical path, a beam splitter for splitting an input optical beam into first and second sub-beams for propagating in the first and second arm optical paths, respectively, and a beam combiner for combining the first and second sub-beams propagated in the first and second arm optical paths, respectively, into an output optical beam. The first arm including a carrier modification element to induce a phase shift in the first arm optical path relative to the second arm optical path. A cladding may be provided proximate to the first arm, the cladding having a temperature coefficient of refractive index (dn/dT) cl opposite in sign to a temperature coefficient of refractive index (dn/dT) a of the first arm.