公开(公告)号：US20210223479A1

公开(公告)日：2021-07-22

申请号：US17248223

申请日：2021-01-14

Applicant: II-VI Delaware, Inc.

Inventor： Chunyan JIA ,  Peng Xiao ,  Zhihua Song ,  Yingying Liu ,  Jin'e Hua

IPC: G02B6/35 ,  G02B6/26

Abstract: The present disclosure provides a MEMS-based variable optical attenuator (VOA) array, sequentially including an optical fiber array, a micro-lens array, and a MEMS-based micro-reflector array to form a VOA array having several optical attenuation units. The MEMS-based micro-reflectors can change the propagation direction of a beam, causing a misalignment coupling loss to the beam and thereby achieving optical attenuation, with a broad range of dynamic attenuation, low polarization dependent loss and wavelength dependent loss, good repeatability, short response time (at the millisecond level), etc. Arrayed device elements are used as assembly units of the present disclosure, and the assembly of arrayed elements facilitates tuning in batches. Accordingly, automation levels are improved, and the production costs are reduced.

公开(公告)号：US20240055820A1

公开(公告)日：2024-02-15

申请号：US18149512

申请日：2023-01-03

Applicant: II-VI Delaware, Inc.

Inventor： Yuping WU ,  Chunyan JIA ,  Han CHEN ,  Xu SU ,  Xuchen HUANG

IPC: H01S3/067 ,  H01S3/16

CPC classification number: H01S3/06766 ,  H01S3/1608 ,  H01S3/094003

Abstract: An assembly is used with an amplifier that amplifies light using source light, pump light, and a doped fiber. The assembly has a plurality of ports, including a first port for input of the source light, a second port for input of the pump light, a third port for output to the doped fiber, a fourth port for input from the doped fiber, and a fifth port for amplified output. A birefringent device in optical communication with each of the ports is configured to refract o-light and e-light components of the light passing therethrough with different refractive indices. For the first and fourth ports, a first half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a first rotation. For the second port, a second half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a second rotation different from the first polarization. A lens is used to focus the light, and an optical filter in optical communication with the lens is configured to reflect the pump light back to the lens and being configured to pass the source light. A rotator in optical communication with the lens is configured to rotate polarization of the light passing therethrough with a third rotation. The third rotation is half of the first rotation, and the first rotation is half of the second rotation. Finally, a wedge reflector in optical communication with the rotator is configured to reflect the light incident thereto. The source light and the pump light are combined and communicated from the second port for output to the doped fiber. Meanwhile, amplified light from the doped fiber is received at the fourth port and is communicated to the amplified output. Reverse light from the amplified output can be isolated from reaching the doped fiber, and reverse source light from the doped fiber can be isolated from reaching the source port.