Wavelength conversion apparatus and wavelength conversion method

Patent metadata

Field	Value
Publication number	US-10761400-B2
Application number	US-201916575122-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Sep 18, 2018
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A wavelength conversion apparatus and a wavelength conversion method that can stably output wavelength converted light for a long time are provided. A wavelength conversion apparatus 100 according to an aspect of the present disclosure includes a casing 10 , a wavelength conversion element 25 disposed inside the casing 10 and configured to convert a wavelength of incident light and output light with the converted wavelength, a first port 11 that introduces a first gas containing 99.9% or more of a nitrogen gas inside the casing 10 , and a second port 12 that introduces a second gas containing 1% or more of an oxygen gas.

First claim

The invention claimed is:

1. A wavelength conversion apparatus, comprising:
a casing;
an external resonator disposed in an internal space of the casing;
a wavelength conversion element disposed in an optical path of the external resonator inside the casing and configured to convert a wavelength of incident light and output light with the converted wavelength; and
a gas supply means for introducing, into the internal space of the casing, a gas in which a ratio of an oxygen gas to a nitrogen gas falls within a range of 1/9999 to 1/99,
wherein the casing includes a first port and a second port,
the first port introduces a first gas containing 99% or more of a nitrogen gas into the internal space of the casing,
the second port introduces a second gas containing 1% or more of an oxygen gas into the internal space of the casing,
an ejection opening of the second port is disposed closer to the wavelength conversion element than an election opening of the first port so that the second gas is ejected from the opening of the second port toward the wavelength conversion element.

2. The wavelength conversion apparatus according to claim 1 , wherein the second gas is dry air.

3. The wavelength conversion apparatus according to claim 1 , wherein
two wavelength conversion elements are provided inside the casing, and
the ejection opening that ejects the second gas is provided for each of the two wavelength conversion elements.

Assignees

• Lasertec Corp

Inventors

• Ando Akihiro
• Sakuma Jun

Classifications

• G02F1/3505

  Coatings; Housings; Supports · CPC title

• G02F1/3507

  Arrangements comprising two or more nonlinear optical devices · CPC title

• G02F1/3503

  Structural association of optical elements, e.g. lenses, with the non-linear optical device · CPC title

• G02F1/3534

  Three-wave interaction, e.g. sum-difference frequency generation (G02F1/3532 takes precedence) · CPC title

• G02F1/3501 Primary

  Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals · CPC title