Title:
LIGHT INTENSITY MONITORING CIRCUIT AND FIBER LASER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/122566
Kind Code:
A1
Abstract:
A fiber laser system is comprised of: a fiber laser apparatus (10) further comprising a fiber laser (11); a laser output-end section (20); and a delivery fiber (30) that connects the fiber laser apparatus (10) and the laser output-end section (20). The delivery fiber (30) is comprised of a double-clad fiber. An SFBG (31), which conjoins with a backward clad mode wherein a portion of laser beams propagating through the core of the delivery fiber (30) is reflected and propagated in the opposite direction through a first clad, is formed at the output-end side of the delivery fiber (30). Further, a backward-clad-mode light detection unit (32), which detects the intensity of backward-clad-mode light that is generated as a result of the conjoining of the SFBG (31) with the backward clad mode, is formed at the input-end side of the delivery fiber (30).
Inventors:
MIYAUCHI, Hidenori (())
Application Number:
JP2011/057652
Publication Date:
October 06, 2011
Filing Date:
March 28, 2011
Export Citation:
Assignee:
Fujikura Ltd. (1-5-1, Kiba Koto-k, Tokyo 12, 〒1358512, JP)
株式会社フジクラ (〒12 東京都江東区木場１丁目５番１号 Tokyo, 〒1358512, JP)
株式会社フジクラ (〒12 東京都江東区木場１丁目５番１号 Tokyo, 〒1358512, JP)
International Classes:
H01S3/06; B23K26/08; G01J1/02; G01M11/00; G02B6/287; G02B6/42
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
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Claims: