The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2025
Filed:
Dec. 21, 2021
Xtia Ltd, Tokyo, JP;
Kazuhiro Imai, Tokyo, JP;
Motonobu Kourogi, Tokyo, JP;
XTIA LTD, Tokyo, JP;
Abstract
A purpose of the present invention is to provide a low relative phase noise optical comb generation device in which a repetitive frequency of an interference signal of an optical comb is stabilized by reducing a relative phase noise of driving signals with different frequencies for driving multiple optical comb generators in an optical comb distance meter. A low relative phase noise optical comb generation device, comprising: at least three oscillatorsA,B for generating frequency signals with mutually different frequencies phase locked to a reference frequency signal F REF given by a reference oscillator; and at least two frequency convertersA,B to which a frequency signal obtained by one oscillatorof the at least three oscillators and respective frequency signals obtained by respective oscillatorsA,B other than the one oscillator are input; wherein the at least two frequency convertersA,B supply the at least two types of modulation signals, in which a relative phase noise is reduced respectively as a sum frequency signal or a difference frequency signal of the frequency signal by the one oscillator and a frequency signal by other oscillator with a lower phase noise, to at least two optical comb generatorsA,B as driving signals.