公开(公告)号：US10551714B2

公开(公告)日：2020-02-04

申请号：US15980707

申请日：2018-05-15

Applicant: Finisar Sweden AB

Inventor： David Adams ,  Efthymios Rouvalis ,  Jan-Olof Wesström ,  Martin Zirngibl ,  Robert Lewén ,  Christopher Daunt

IPC: G02F1/225 ,  H04B10/079 ,  G02F1/21

Abstract: An optical interference modulator comprises a main input, a main output, an optical splitter connected to the main input, first and second MMI couplers, each with a first primary-end access port connected to the splitter; a second primary-end access port connected to the main output; a first secondary-end access port connected to a respective primary waveguide; and a second secondary-end access port connected to a respective secondary waveguide. A light reflector is arranged to reflect light incident from said primary and secondary waveguides back into the same respective waveguide such that light travelling through the respective waveguide from the respective secondary-end access port, after reflection, travels back to the same secondary-end access port. For the MMI couplers, at least one of the respective primary and secondary waveguides comprises a respective light phase modulating device arranged to modulate the phase of light travelling along the corresponding waveguide in either direction.

公开(公告)号：US20180309267A1

公开(公告)日：2018-10-25

申请号：US15953392

申请日：2018-04-13

Applicant: Finisar Sweden AB

Inventor： Jan-Olof Wesström ,  Per GRANESTRAND ,  Martin Anders Isak STATTIN ,  Staffan David HELLSTRÖM

IPC: H01S5/50 ,  H01S5/22 ,  H01S5/042

CPC classification number: H01S5/5027 ,  H01S5/042 ,  H01S5/22 ,  H01S2301/02

Abstract: An optical device comprises a light input, a light modulating means and a light output. The optical device further comprises an optical amplification device arranged to amplify light travelling between said light modulating means and said output. The optical amplification device comprises first and second serially connected post SOA (Semiconductor Optical Amplifier) units, each comprising at least one respective serially connected post SOA segment, which device is arranged to vary a light amplification by varying respective SOA bias voltages across said post SOA segments. A total SOA length of the first post SOA unit is relatively longer than a total SOA length of the second post SOA unit, which is relatively shorter. The optical device is arranged to, during operation using a particular operation program, always keep respective SOA bias voltages across each of the post SOA segments of the first post SOA unit at +0.5 V or more.

公开(公告)号：US11081863B2

公开(公告)日：2021-08-03

申请号：US15953392

申请日：2018-04-13

Applicant: Finisar Sweden AB

Inventor： Jan-Olof Wesström ,  Per Granestrand ,  Martin Anders Isak Stattin ,  Staffan David Hellström

IPC: H01S5/50 ,  H01S5/042 ,  H01S5/026 ,  H01S5/22 ,  H01S5/10 ,  H01S5/062

Abstract: An optical device comprises a light input, a light modulating means and a light output. The optical device further comprises an optical amplification device arranged to amplify light travelling between said light modulating means and said output. The optical amplification device comprises first and second serially connected post SOA (Semiconductor Optical Amplifier) units, each comprising at least one respective serially connected post SOA segment, which device is arranged to vary a light amplification by varying respective SOA bias voltages across said post SOA segments. A total SOA length of the first post SOA unit is relatively longer than a total SOA length of the second post SOA unit, which is relatively shorter. The optical device is arranged to, during operation using a particular operation program, always keep respective SOA bias voltages across each of the post SOA segments of the first post SOA unit at +0.5 V or more.

公开(公告)号：US20180335681A1

公开(公告)日：2018-11-22

申请号：US15980707

申请日：2018-05-15

Applicant: Finisar Sweden AB

Inventor： David Adams ,  Efthymios Rouvalis ,  Jan-Olof Wesström ,  Martin Zirngibl

IPC: G02F1/225 ,  H04B10/079

CPC classification number: G02F1/225 ,  G02F2001/212 ,  G02F2001/217 ,  H04B10/0795 ,  H04B10/5053

Abstract: An optical interference modulator comprises a main input, a main output, an optical splitter connected to the main input, first and second MMI couplers, each with a first primary-end access port connected to the splitter; a second primary-end access port connected to the main output; a first secondary-end access port connected to a respective primary wave-guide; and a second secondary-end access port connected to a respective secondary wave-guide. A light reflector is arranged to reflect light incident from said primary and secondary waveguides back into the same respective waveguide such that light travelling through the respective waveguide from the respective secondary-end access port, after reflection, travels back to the same secondary-end access port. For the MMI couplers, at least one of the respective primary and secondary waveguides comprises a respective light phase modulating device arranged to modulate the phase of light travelling along the corresponding waveguide in either direction.