公开(公告)号：US20220238745A1

公开(公告)日：2022-07-28

申请号：US17362316

申请日：2021-06-29

申请人： Lumentum Japan, Inc.

发明人： Takashi TOYONAKA ,  Hiroshi HAMADA ,  Shigehisa TANAKA

IPC分类号： H01L31/11 ,  H01L31/103

摘要： A semiconductor light-receiving element, includes: a semiconductor substrate; a high-concentration layer of a first conductivity type formed on the semiconductor substrate; a low-concentration layer of the first conductivity type formed on the high-concentration layer of the first conductivity type and in contact with the high-concentration layer of the first conductivity type; a low-concentration layer of a second conductivity type configured to form a PN junction interface together with the low-concentration layer of the first conductivity type; and a high-concentration layer of the second conductivity type formed on the low-concentration layer of the second conductivity type and in contact with the low-concentration layer of the second conductivity type. The low-concentration layers have a carrier concentration of less than 1×1016/cm3. The high-concentration layers have a carrier concentration of 1×1017/cm3 or more. At least one of the low-concentration layers includes an absorption layer with a band gap that absorbs incident light.

公开(公告)号：US20240113797A1

公开(公告)日：2024-04-04

申请号：US18315348

申请日：2023-05-10

申请人： Lumentum Japan, Inc.

发明人： Nobuhiko KIKUCHI ,  Shigehisa TANAKA

IPC分类号： H04J14/02 ,  H04B10/61

CPC分类号： H04J14/0201 ,  H04B10/614 ,  H04J14/0254

摘要： A plurality of optical signals are arranged on optical frequency grids having a frequency spacing of Δf, a wavelength multiplexing optical signal includes at least one specific arrangement signal group, and the specific arrangement signal group includes Q S signal(s) and R P signal(s), where Q is an integer of 1 or more and R is an integer of 1 or more. A frequency difference between any pair of S signals included in the specific arrangement signal group is different from frequency differences between all of other pairs of S signals and frequency differences between all pairs of P signals, and a frequency difference between any pair of P signals included in the specific arrangement signal group is different from frequency differences between all pairs of S signals and frequency differences between all of other pairs of P signals.

公开(公告)号：US20200064548A1

公开(公告)日：2020-02-27

申请号：US16551175

申请日：2019-08-26

申请人： Lumentum Japan, Inc.

发明人： Kensuke OGAWA ,  Hiroki IRIE ,  Hiroaki INOUE ,  Takayoshi FUKUI ,  Shigehisa TANAKA

IPC分类号： G02B6/12 ,  G02F1/225

摘要： An electro-optic waveguide device may include a slot waveguide including a lower high-refractive-index layer with a first refractive index and an upper high-refractive-index layer with a second refractive index, wherein the lower high-refractive-index layer and the upper high-refractive-index layer have conductivity and are disposed to face each other with a gap; and a slot part formed as a low-refractive-index layer, wherein the low-refractive-index layer is formed of a material producing an electro-optic effect and has a third refractive index lower than the first refractive index and the second refractive index, wherein the low-refractive-index layer is formed in the gap to come into contact with the lower high-refractive-index layer and the upper high-refractive-index layer, and wherein one of the lower high-refractive-index layer or the upper high-refractive-index layer includes a stretch stretching on both sides of a contact portion with the slot part in a width direction intersecting a transmission direction.