Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO2010073645) FIBER LASER APPARATUS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/073645 International Application No.: PCT/JP2009/007154
Publication Date: 01.07.2010 International Filing Date: 24.12.2009
IPC:
H01S 3/23 (2006.01) ,G02F 1/35 (2006.01) ,H01S 3/06 (2006.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
23
Arrangement of two or more lasers not provided for in groups H01S3/02-H01S3/14113
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35
Non-linear optics
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
05
Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06
Construction or shape of active medium
Applicants:
株式会社フジクラ FUJIKURA LTD. [JP/JP]; 東京都江東区木場一丁目5番1号 5-1, Kiba 1-chome, Koto-ku, Tokyo 1350042, JP (AllExceptUS)
竹永勝宏 TAKENAGA, Katsuhiro [JP/JP]; JP (UsOnly)
Inventors:
竹永勝宏 TAKENAGA, Katsuhiro; JP
Agent:
森村靖男 MORIMURA, Yasuo; JP
Priority Data:
2008-33376126.12.2008JP
Title (EN) FIBER LASER APPARATUS
(FR) APPAREIL LASER À FIBRE
(JA) ファイバレーザ装置
Abstract:
(EN) Disclosed is a fiber laser apparatus which can prevent a laser oscillator from being damaged if a laser beam is reflected by an object to be irradiated or at an emission end.  The apparatus comprises a laser oscillator (10) which generates a laser beam of a first wavelength; a first optical filter (20) which permits the laser beam of the first wavelength to pass therethrough; a wavelength converter (30) which generates a laser beam of a second wavelength due to stimulated Raman scattering caused by the laser beam of the first wavelength and permits the laser beam of the first wavelength and the laser beam of the second wavelength to pass therethrough; a second optical filter (40) which permits the laser beam of the second wavelength and does not permit the laser beam of the first wavelength to pass therethrough; an optical fiber amplifier (50) which amplifies the laser beam of the second wavelength; and an output terminal (60) which outputs the leaser beam of the second wavelength.  The first optical filter (20) does not permit the laser beam of the second wavelength to pass therethrough.  The first optical filter (20), the wavelength converter (30), and the second optical filter (40) are formed of photonic bandgap fibers.
(FR) L'invention porte sur un appareil laser à fibre qui peut empêcher un oscillateur laser d'être endommagé si un faisceau laser est réfléchi par un objet devant être exposé ou au niveau d'une extrémité d'émission. L'appareil comprend un oscillateur laser (10) qui génère un faisceau laser d'une première longueur d'onde ; un premier filtre optique (20) qui permet au faisceau laser de la première longueur d'onde de passer à travers ; un convertisseur de longueur d'onde (30) qui génère un faisceau laser d'une seconde longueur d'onde par diffusion Raman stimulée provoquée par le faisceau laser de la première longueur d'onde et permet au faisceau laser de la première longueur d'onde et au faisceau laser de la seconde longueur d'onde de passer à travers ; un second filtre optique (40) qui permet au faisceau laser de la seconde longueur d'onde et ne permet pas au faisceau laser de la première d'onde de passer à travers ; un amplificateur à fibre optique (50) qui amplifie le faisceau laser de la seconde longueur d'onde ; et une borne de sortie (60) qui émet le faisceau laser de la seconde longueur d'onde. Le premier filtre optique (20) ne permet pas au faisceau laser de la seconde longueur d'onde de passer à travers. Le premier filtre optique (20), le convertisseur de longueur d'onde (30) et le second filtre optique (40) sont fait de fibres à bande interdite photonique.
(JA) 【課題】 レーザ光が、照射物や出射端で反射する場合においても、レーザ発振器に損傷を与えることが防止できるファイバレーザ装置を提供する。【解決手段】 第1波長のレーザ光を発生するレーザ発振器10と、第1波長のレーザ光を透過させる第1光フィルタ20と、第1波長のレーザ光による誘導ラマン散乱により、第2波長のレーザ光を発生させ、第1波長のレーザ光と前記第2波長のレーザ光とを透過させる波長変換器30と、第2波長のレーザ光を透過させ、第1波長のレーザ光の透過が抑制される第2光フィルタ40と、第2波長のレーザ光を増幅する光ファイバ増幅器50と、第2波長のレーザ光を出力する出力端60とを備え、第1光フィルタ20は、第2波長のレーザ光の透過が抑制され、第1光フィルタ20、波長変換器30、第2光フィルタ40は、フォトニック・バンド・ギャップ・ファイバにより構成される。
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP2381543JPWO2010073645US20110286474CN102265473