公开(公告)号：US20240195601A1

公开(公告)日：2024-06-13

申请号：US18553039

申请日：2022-02-25

Applicant: National Institute of Information and Communications Technology

Inventor： Yuichiro YANO ,  Tetsuya IDO ,  Motoaki HARA

IPC: H04L7/033 ,  H03L7/099

CPC classification number: H04L7/033 ,  H03L7/0992

Abstract: A node includes: a communication module that recovers a clock signal of another node; a high-precision clock module; a first phase/frequency comparison module; a time estimation section that estimates time information of each node; a counter value correction section that corrects a counter value; a fractional PLL; a second phase/frequency comparison module; and a division ratio correction section that corrects a division ratio of the fractional PLL.

公开(公告)号：US20220200612A1

公开(公告)日：2022-06-23

申请号：US17692742

申请日：2022-03-11

Applicant: National Institute of Information and Communications Technology ,  Tokyo Institute of Technology

Inventor： Motoaki HARA ,  Yuichiro YANO ,  Masatoshi KAJITA ,  Tetsuya IDO ,  Hiroyuki ITO

IPC: H03L7/26 ,  G04F5/14

Abstract: This atomic resonator for causing a resonance frequency by CPT resonance includes: a gas cell having alkali metal atoms enclosed; a photodetector configured to detect light having passed through the gas cell and convert the light to an electric signal; a high-frequency oscillator configured to receive the electric signal and output the signal after a frequency thereof is divided by two; and a laser light source configured to modulate and introduce, into the gas cell, light based on the signal output from the high-frequency oscillator. The high-frequency oscillator has an injection-locked frequency divider circuit including an acoustic resonator as an oscillation element.

公开(公告)号：US20240150229A1

公开(公告)日：2024-05-09

申请号：US18280747

申请日：2022-01-27

Applicant: National Institute of Information and Communications Technology ,  TOYOBO MC Corporation

Inventor： Motoaki HARA ,  Yuichiro YANO ,  Tetsuya IDO ,  Hikaru TANAKA ,  Kazutake HAGIYA ,  Yasuhiro SATO

IPC: C03C17/22 ,  B32B3/26 ,  B32B3/30 ,  B32B17/10 ,  B32B27/28 ,  B32B37/18 ,  B32B38/00 ,  G04F5/14 ,  H01S1/06 ,  H03L7/26

CPC classification number: C03C17/22 ,  B32B3/266 ,  B32B3/30 ,  B32B17/10 ,  B32B27/283 ,  B32B37/182 ,  B32B38/0004 ,  B32B38/0008 ,  G04F5/14 ,  H03L7/26 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2255/20 ,  B32B2310/0831 ,  B32B2315/08 ,  B32B2383/00 ,  B32B2457/00 ,  C03C2217/28 ,  C03C2218/11 ,  C03C2218/34 ,  C03C2218/355 ,  H01S1/06

Abstract: The problem of the present invention is to provide a substrate with high versatility, a method for producing the substrate, and a method for producing a unit cell using the substrate. The problem is solved by providing a substrate comprising a plurality of alkali metal azide spots on a substantially flat surface.

公开(公告)号：US20230319746A1

公开(公告)日：2023-10-05

申请号：US18003528

申请日：2021-06-29

Applicant: National Institute of Information and Communications Technology

Inventor： Motoaki HARA ,  Yuichiro YANO ,  Tetsuya IDO

IPC: H04W56/00

CPC classification number: H04W56/0015

Abstract: A time synchronization network able to efficiently maintain time synchronization according to standard time is described. A communication device includes a time information output unit and a time synchronization unit. The time information output unit is configured to output time information with an internal clock that is stable. The time synchronization unit is configured to correct the time information of the time information output unit based on information on a time difference between the communication device and another communication device adjacent to the communication device.

公开(公告)号：US20230012453A1

公开(公告)日：2023-01-12

申请号：US17783776

申请日：2020-12-08

Applicant: National Institute of Information and Communications Technology

Inventor： Motoaki HARA ,  Yuichiro YANO ,  Masatoshi KAJITA ,  Tetsuya IDO ,  Satoshi SHINADA ,  Takahito ONO ,  Masaya TODA

IPC: H01S5/183 ,  H01S5/042

Abstract: Provided is a variable-wavelength surface emission laser having a wide wavelength variation range. A partial region of a thin-plate substrate (22) and a movable mirror (20), the partial region being positioned between an air gap (G1) and a movable gap (G2), can move toward the air gap (G1) side or the movable gap (G2) side.