OPTICAL COMB LIGHT SOURCE AND MEASURING DEVICE

The optical comb light source addresses the limitation of frequency change range by using an optical frequency changing section and mode control to exceed half the repetition frequency, enabling flexible and precise optical frequency adjustments.

DE102025129776A1Pending Publication Date: 2026-03-19ADVANTEST CORP
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-07-29
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

Conventional optical comb light sources are limited in the range of optical frequency change due to the constraint that the beat frequency must be less than half the repetition frequency, restricting the flexibility and range of optical frequency adjustment.

Method used

An optical comb light source with an optical frequency changing section and a mode optical frequency control section allows for the change of optical frequencies of multiple modes, enabling changes exceeding half the repetition frequency by using an acousto-optic modulator or phase modulation device, with a predetermined difference in mode optical frequency and target optical frequency.

Benefits of technology

The optical comb light source can achieve optical frequency changes exceeding half the repetition frequency, enhancing the flexibility and range of optical frequency adjustment, allowing for more precise control and application in measuring devices.

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Abstract

An optical comb light source outputs an optical comb with a multitude of modes. The optical comb light source comprises an optical comb generation section, an optical frequency modulation section, and a mode optical frequency control section. The optical comb generation section generates the optical comb. The optical frequency modulation section receives a reference wavelength light with a predetermined optical frequency and modulates the optical frequency of the reference wavelength light for output. The mode optical frequency control section controls a mode optical frequency, which is an optical frequency of one of the multiple modes, such that the difference between the mode optical frequency and a target optical frequency, which is an optical frequency of an output from the optical frequency modulation section, has a predetermined value.The optical comb generating section changes the optical frequencies of the multiple modes according to the controlled mode optical frequency.
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Citation Information

Patent Citations

  • Light frequency synthesizer

    JP2004077979A

  • 2004-077979