Title:
FIBER LASER
Document Type and Number:
WIPO Patent Application WO/2020/155997
Kind Code:
A1
Abstract:
A fiber laser (100) comprises a seed source (20) used to output initial laser light, a first-stage amplifier (30) for preliminary amplification, a second-stage amplifier (40) for secondary amplification, and a third-stage amplifier (50) for tertiary amplification. The first-stage amplifier (30) comprises a first active optical fiber (32), a first beam combiner (33), and a first pump source (34). A passive optical fiber (31), the first active optical fiber (32), and the first beam combiner (33) are connected between the seed source (20) and the second-stage amplifier (40). The first pump source (34) is connected to the first beam combiner (33). The second-stage amplifier (40) comprises a second active optical fiber (41), a second beam combiner (42), and a second pump source (43). The second active optical fiber (41) and the second beam combiner (42) are connected between the first-stage amplifier (30) and the third-stage amplifier (50). For the same given target power, the invention divides a total gain between the first-stage amplifier (30), the second-stage amplifier (40), and the third-stage amplifier (50) by performing multiple amplification operations on initial laser light, thereby reducing an individual gain of each stage, accordingly lowering influences of spontaneous emission and photodarkening of each amplifier stage, and increasing the service life.
Inventors:
ZHOU HUANXIAN (CN)
ZHU JIANGJIE (CN)
QIANG RUIRONG (CN)
ZHU JIANGJIE (CN)
QIANG RUIRONG (CN)
Application Number:
PCT/CN2019/129634
Publication Date:
August 06, 2020
Filing Date:
December 28, 2019
Export Citation:
Assignee:
SHENZHEN JPT OPTO-ELECTRONICS CO LTD (CN)
International Classes:
H01S3/067
Foreign References:
| CN109687270A | 2019-04-26 | |||
| CN209358055U | 2019-09-06 | |||
| CN106451043A | 2017-02-22 | |||
| CN1419143A | 2003-05-21 | |||
| CN203561804U | 2014-04-23 | |||
| CN106816806A | 2017-06-09 | |||
| US20120307850A1 | 2012-12-06 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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