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公开(公告)号：US20150063810A1
公开(公告)日：2015-03-05
申请号：US14389426
申请日：2013-03-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuji Hayami , Toshio Kataoka
IPC: H04B10/61
CPC classification number: H04B10/6166 , H04B10/614 , H04J14/0221 , H04J14/06
Abstract: An object of the present invention is to provide an optical 90-degree hybrid circuit which is capable of easily adjusting the optical power ratio between signal and local oscillator and suppresses an optical system of an optical receiver becoming complex and optical receivers using the same. The optical 90-degree hybrid circuit for demodulating multilevel phase-modulated signals corresponding to individual polarized waves by multiplexing an optical wave having a predetermined plane of polarization contained in signal and local oscillator that has the same wavelength as the signal and has been adjusted to circularly-polarized signal, and polarization-splitting the multiplexed signal includes polarization splitting means (polarization splitting) for extracting an optical wave having a predetermined plane of polarization from the signal, a polarization conversion element for rotating a plane of polarization of the optical wave extracted from the polarization splitting means, and a polarizer that determines a plane of polarization of the signal before multiplexing the signal with the local oscillator, and the polarization splitting means, the polarization conversion element, and the polarizer adjust intensity of the optical signal (VOA function) in cooperation with each other.
Abstract translation: 本发明的目的是提供一种光学90度混合电路，其能够容易地调整信号和本地振荡器之间的光功率比，并抑制光接收机的光学系统变得复杂，并且使用该光学系统的光接收机。 光学90度混合电路，用于通过复用具有与信号相同波长的信号和本地振荡器中包含的预定偏振平面的光波来解调与各个极化波相对应的多电平相位调制信号，并将其调整为循环 并且偏振分离，复用信号包括用于从该信号中提取具有预定偏振平面的光波的偏振分离装置（偏振分离），用于旋转从...提取的光波偏振平面的偏振转换元件 所述偏振光分离装置和偏振器，其在将所述信号与所述本地振荡器复用之前确定所述信号的偏振面，并且所述偏振光分离装置，所述偏振光转换元件和所述偏振器调整所述光信号的强度（VOA功能） 相互配合。
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公开(公告)号：US20240210784A1
公开(公告)日：2024-06-27
申请号：US18508170
申请日：2023-11-13
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuji Hayami , Kosuke Okahashi
Abstract: An optical waveguide element includes an optical waveguide arranged on a main surface of an optical substrate, and a control electrode configured to control light waves propagating through the optical waveguide. The control electrode includes a first control electrode and a second control electrode facing each other across the optical waveguide on the main surface of the optical substrate. The first control electrode and the second control electrode each include a common electrode extending along the optical waveguide, a plurality of segment electrodes arranged closer to the optical waveguide than the common electrode and divided along an extending direction of the optical waveguide, and a plurality of connection electrodes connecting each of the plurality of segment electrodes to the common electrode. A low dielectric layer having a relative dielectric constant lower than a relative dielectric constant of the optical substrate is arranged between the common electrode and the optical substrate.
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公开(公告)号：US09800349B2
公开(公告)日：2017-10-24
申请号：US14389426
申请日：2013-03-28
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuji Hayami , Toshio Kataoka
CPC classification number: H04B10/6166 , H04B10/614 , H04J14/0221 , H04J14/06
Abstract: An object of the present invention is to provide an optical 90-degree hybrid circuit which is capable of easily adjusting the optical power ratio between signal and local oscillator and suppresses an optical system of an optical receiver becoming complex and optical receivers using the same. The optical 90-degree hybrid circuit for demodulating multilevel phase-modulated signals corresponding to individual polarized waves by multiplexing an optical wave having a predetermined plane of polarization contained in signal and local oscillator that has the same wavelength as the signal and has been adjusted to circularly-polarized signal, and polarization-splitting the multiplexed signal includes polarization splitting means (polarization splitting) for extracting an optical wave having a predetermined plane of polarization from the signal, a polarization conversion element for rotating a plane of polarization of the optical wave extracted from the polarization splitting means, and a polarizer that determines a plane of polarization of the signal before multiplexing the signal with the local oscillator, and the polarization splitting means, the polarization conversion element, and the polarizer adjust intensity of the optical signal (VOA function) in cooperation with each other.
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