公开(公告)号：US20240264380A1

公开(公告)日：2024-08-08

申请号：US18564820

申请日：2021-05-31

Applicant: Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen

Inventor： Jeremy Witzens ,  Florian Merget ,  Manuel Ackermann

IPC: G02B6/30

CPC classification number: G02B6/30

Abstract: The invention relates to a photonic interposer (300) for coupling light between a first optical fiber (200I) and a photonic integrated circuit (100) and between the photonic integrated circuit (100) and a second optical fiber (200O), the photonic interposer (300) comprising a polarization selective beam splitter-/combiner (310) adapted to split an input light beam (400CI) with first and second polarizations, from the first optical fiber (200I), into a first light beam (400AI) and a second light beam (400BI) and to redirect one of the first and second light beams (400AI, 400BI), and the first light beam (400AI) has the first polarization and the second light beam (400BI) has the second polarization which is different from the first polarization; and the polarization selective beam splitter-/combiner (310) is adapted to combine modulated first and second light beams (400AO, 400BO) from the photonic integrated circuit (100) into a combined light beam (400CO) to be coupled to the second optical fiber (220O), and the modulated first and second light beams (400AO, 400BO) are respectively subject to the first and second light beams (400AI, 400BI) being modulated by a same data stream, by the photonic integrated circuit (100).

公开(公告)号：US20230152537A1

公开(公告)日：2023-05-18

申请号：US17802345

申请日：2020-02-26

Applicant: Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen

Inventor： Jeremy Witzens ,  Florian Merget

IPC: G02B6/42

CPC classification number: G02B6/4213 ,  G02B6/4208 ,  G02B6/4246

Abstract: The invention describes an apparatus that implements efficient coupling between a photonic integrated circuit (PIC) and a second optical element such as a fiber or laser, while at the same time allowing for efficient polarization management and/or optical isolation. It enables the packaging of PICs with large single mode fiber counts and in- and out-coupling of light with arbitrary polarization. The apparatus comprises a glass interposer that contains at least one polarization selective element together with a pair of lenses transforming a beam profile between the 2nd optical element and a polarization selective coupler on the PIC. The invention also comprises a method for fabricating the apparatus based on a subassembly of building blocks that are manufactured using wafer-scale high-precision glass-molding and surface treatment(s) such as thin-film coating.

公开(公告)号：US10225018B2

公开(公告)日：2019-03-05

申请号：US15560751

申请日：2015-03-26

Applicant: RWTH Aachen

Inventor： Jeremy Witzens ,  Florian Merget ,  Juliana Mueller

IPC: H04B10/50 ,  H04B10/296 ,  H04B10/038 ,  H04B10/079

Abstract: A transmitter (TX) for a WDM optical link includes a light source (CS) generating a plurality of discrete lines (EL) with different frequencies (f), a plurality of modulators (FSM, RRM, MZM), each modulator (FSM, RRM, MZM) being configured to modulate one of the discrete lines (EL) according to a data stream (c1-c4), at least one optical amplifier (SOA) configured to simultaneously amplify multiple lines (EL), wherein only a subset of the generated lines (EL) is routed to the optical amplifier (SOA) resp. to each one of the optical amplifiers (SOA). A receiver (RX) for an optical link adapted to work together with the transmitter (TX) is also described. An optical link including the transmitter (TX) and/or the receiver (RX), and a method to operate said link are also described.

公开(公告)号：US10168497B2

公开(公告)日：2019-01-01

申请号：US15580965

申请日：2015-06-15

Applicant: RWTH Aachen

Inventor： Florian Merget ,  Jeremy Witzens ,  Alvaro Moscoso-Martir

IPC: G02B6/12 ,  G02B6/42 ,  G02B6/136

Abstract: An apparatus may include a photonic device with at least a first waveguide having a light-conducting core bounded by at least one cladding layer, at least a second waveguide having a light-conducting core bounded by at least one cladding layer, wherein the first waveguide is aligned to couple with the second waveguide, wherein alignment of the first waveguide with the second waveguide with respect to at least one axis C coincides with at least one stop area of the photonic device resting on a stop surface of a corresponding support structure on a substrate, wherein the stop area is a stop in a recess from a surface of the photonic device. A method to fabricate the apparatus may include the recess is formed by etching of the photonic device, and/or the support structure is formed by etching of the substrate.

公开(公告)号：US20180180826A1

公开(公告)日：2018-06-28

申请号：US15580965

申请日：2015-06-15

Applicant: RWTH Aachen

Inventor： Florian Merget ,  Jeremy Witzens ,  Alvaro Moscoso-Martir

IPC: G02B6/42 ,  G02B6/136

CPC classification number: G02B6/423 ,  G02B6/136

Abstract: An apparatus may include a photonic device with at least a first waveguide having a light-conducting core bounded by at least one cladding layer, at least a second waveguide having a light-conducting core bounded by at least one cladding layer, wherein the first waveguide is aligned to couple with the second waveguide, wherein alignment of the first waveguide with the second waveguide with respect to at least one axis C coincides with at least one stop area of the photonic device resting on a stop surface of a corresponding support structure on a substrate, wherein the stop area is a stop in a recess from a surface of the photonic device. A method to fabricate the apparatus may include the recess is formed by etching of the photonic device, and/or the support structure is formed by etching of the substrate.

公开(公告)号：US20180054257A1

公开(公告)日：2018-02-22

申请号：US15560751

申请日：2015-03-26

Applicant: RWTH Aachen

Inventor： Jeremy Witzens ,  Florian Merget ,  Juliana Mueller

IPC: H04B10/50 ,  H04B10/296 ,  H04B10/079 ,  H04B10/038

CPC classification number: H04B10/506 ,  H04B10/038 ,  H04B10/07955 ,  H04B10/296

Abstract: A transmitter (TX) for a WDM optical link includes a light source (CS) generating a plurality of discrete lines (EL) with different frequencies (f), a plurality of modulators (FSM, RRM, MZM), each modulator (FSM, RRM, MZM) being configured to modulate one of the discrete lines (EL) according to a data stream (c1-c4), at least one optical amplifier (SOA) configured to simultaneously amplify multiple lines (EL), wherein only a subset of the generated lines (EL) is routed to the optical amplifier (SOA) resp. to each one of the optical amplifiers (SOA). A receiver (RX) for an optical link adapted to work together with the transmitter (TX) is also described. An optical link including the transmitter (TX) and/or the receiver (RX), and a method to operate said link are also described.

公开(公告)号：US09036953B2

公开(公告)日：2015-05-19

申请号：US13784553

申请日：2013-03-04

Applicant: RWTH Aachen University

Inventor： Jeremy Witzens ,  Florian Merget

IPC: G02F1/01 ,  G02B6/00 ,  G02F1/225 ,  G02F1/025 ,  G02F1/015

CPC classification number: G02F1/2255 ,  G02F1/0121 ,  G02F1/025 ,  G02F1/2257 ,  G02F2001/0152 ,  H04B10/505

Abstract: An electro-optical modulator with two electrodes as part of a transmission line of a first phase modulator and two electrodes as part of a transmission line of a second phase modulator included in two arms of a Mach-Zehnder-interferometer. An electrical controller applies a first electrical high-frequency-modulated voltage signals between the first and second electrodes and applies a second electrical high-frequency-modulated signals between the fourth and third electrodes. The electrical controller applies signals such that voltages applied to the first and fourth electrodes have substantially a same high-frequency content, and voltages applied to the second and third electrodes have substantially the same high-frequency content. In such configuration, a constant voltage offset is produced by either the voltages applied to the first and fourth electrodes or, the second and third electrodes. Thereby, cross-talk between electrodes, electrical losses, device size and fabrication costs may be reduced.

Abstract translation: 一种电光调制器，其具有作为第一相位调制器的传输线的一部分的两个电极和作为包括在马赫 - 曾德干涉仪的两个臂中的第二相位调制器的传输线的一部分的两个电极。 电控制器在第一和第二电极之间施加第一电高频调制电压信号，并在第四和第三电极之间施加第二电高频调制信号。 电气控制器施加信号，使得施加到第一和第四电极的电压具有基本上相同的高频含量，并且施加到第二和第三电极的电压具有基本上相同的高频含量。 在这种配置中，通过施加到第一和第四电极或第二和第三电极的电压产生恒定电压偏移。 因此，电极之间的串扰，电损耗，器件尺寸和制造成本可能会降低。