Title:
OPTICAL BEAM TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/187848
Kind Code:
A1
Abstract:
An optical beam transmission device (2) is configured so as to comprise: an optical distribution unit (11) which distributes laser light outputted from a laser light source (1) among a plurality of transmission lines (10-1) to (10-N); and a frequency addition unit (13) in which a plurality of frequency shift amounts that are different from each other are given each as a frequency shift amount for laser light that has passed through each transmission line (10-n) (n = 1, …, N), and a frequency that is away from the frequency of the laser light that has passed through each transmission line (10-n) by the frequency shift amount thereof is included, as a detection frequency, in the laser light that passes through each transmission line. The optical beam transmission device (2) further comprises a laser light branching unit (16) which takes out part of the laser light that has passed through each transmission line (10-n), and a photoelectric conversion unit (17) which collects a plurality of laser light beams taken out by the laser light branching unit (16), and converts collected laser light into an electric signal. The optical beam transmission device (2) still further comprises a deviation amount calculation unit (18) which, on the basis of a plurality of detection frequencies included in the electric signal, calculates the deviation amount of the frequency of the laser light that has passed through each transmission line (10-n), and an optical frequency deviation unit (12) which deviates the frequency of the laser light that passes through each transmission line (10-n) by the deviation amount calculated by the deviation amount calculation unit (18).
Inventors:
AKIYAMA TOMOHIRO (JP)
ANDO TOSHIYUKI (JP)
ANDO TOSHIYUKI (JP)
Application Number:
PCT/JP2022/014759
Publication Date:
October 05, 2023
Filing Date:
March 28, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G02F2/02; G02F1/01; H01S3/10
Foreign References:
| JP2011254028A | 2011-12-15 | |||
| JP2015200822A | 2015-11-12 | |||
| JP2012119654A | 2012-06-21 | |||
| US20210181310A1 | 2021-06-17 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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