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1. WO2020202757 - LASER MODULE AND FIBER LASER DEVICE

Publication Number WO/2020/202757
Publication Date 08.10.2020
International Application No. PCT/JP2020/003431
International Filing Date 30.01.2020
IPC
G02B 6/42 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24Coupling light guides
42Coupling light guides with opto-electronic elements
H01S 3/067 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
063Waveguide lasers, e.g. laser amplifiers
067Fibre lasers
H01S 5/022 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
02Structural details or components not essential to laser action
022Mountings; Housings
H01S 5/40 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
40Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02-H01S5/30128
Applicants
  • 株式会社フジクラ FUJIKURA LTD. [JP]/[JP]
Inventors
  • 葛西 洋平 KASAI Yohei
Agents
  • 森 友宏 MORI Tomohiro
Priority Data
2019-06692829.03.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LASER MODULE AND FIBER LASER DEVICE
(FR) MODULE LASER ET DISPOSITIF LASER À FIBRE
(JA) レーザモジュール及びファイバレーザ装置
Abstract
(EN)
Provided is a laser module capable of reducing the residual excitation light downstream from an amplifying optical fiber. A laser module 1 is provided with: an optical fiber 521 connected to an amplifying optical fiber 512 that has a core 630 doped with rare earth ions; laser elements 141-148 that emit laser light B1-B8; and a condensing lens 16 that focuses the laser light B1-B8 and connect the laser light B1-B8 to the optical fiber 521. The laser elements 141-148 are configured such that laser light with wavelengths at which the amplifying optical fiber 512 has a relatively low absorption rate with respect to rare earth ions is incident on the optical fiber 521 at a relatively large incident angle. The laser element 145 emits laser light with wavelengths in the peak wavelength band of the absorption spectrum of the rare earth ions of the amplifying optical fiber 521; the laser light is incident on the optical fiber 521 at the smallest incident angle of the laser light B1-B8.
(FR)
L'invention concerne un module laser capable de réduire la lumière d'excitation résiduelle en aval d'une fibre optique d'amplification. Un module laser 1 est pourvu : d'une fibre optique 521 connectée à une fibre optique d'amplification 512 qui a un coeur 630 dopé avec des ions de terres rares ; des éléments laser 141-148 qui émettent une lumière laser B1-B8 ; et une lentille de condensation 16 qui concentre la lumière laser B1-B8 et connecte la lumière laser B1-B8 à la fibre optique 521. Les éléments laser 141-148 sont configurés de telle sorte que la lumière laser ayant des longueurs d'onde auxquelles la fibre optique d'amplification 512 a un taux d'absorption relativement faible par rapport aux ions de terres rares est incidente sur la fibre optique 521 à un angle d'incidence relativement grand. L'élément laser 145 émet une lumière laser ayant des longueurs d'onde dans la bande de longueur d'onde de pic du spectre d'absorption des ions de terres rares de la fibre optique d'amplification 512 ; la lumière laser est incidente sur la fibre optique 521 à l'angle d'incidence le plus petit de la lumière laser B1-B8.
(JA)
増幅用光ファイバよりも後流側での残留励起光を低減することができるレーザモジュールを提供する。レーザモジュール1は、希土類元素イオンが添加されたコア630を有する増幅用光ファイバ512に接続される光ファイバ521と、レーザ光B1~B8を出射するレーザ素子141~148と、レーザ光B1~B8を集光して光ファイバ521に結合させる集光レンズ16とを備える。レーザ素子141~148は、増幅用光ファイバ512の希土類元素イオンに対する吸収率が相対的に低い波長のレーザ光が、相対的に大きい入射角度で光ファイバ521に入射するように構成される。増幅用光ファイバ521の希土類元素イオンの吸収スペクトルのピーク波長帯域の波長を有するレーザ光がレーザ素子145から出射され、レーザ光B1~B8の中で最も小さな入射角度で光ファイバ521に入射する。
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