Title:
NARROW LINEWIDTH EXTERNAL CAVITY LASER BASED ON METASURFACE NARROWBAND REFLECTOR
Document Type and Number:
WIPO Patent Application WO/2020/019573
Kind Code:
A1
Abstract:
Disclosed is a narrow linewidth external cavity laser based on a metasurface narrowband reflector, belonging to the field of lasers. The narrow linewidth external cavity laser comprises a gain medium (1), a collimating component (2) and a metasurface narrowband reflector (3), wherein a surface of the metasurface narrowband reflector is a metasurface of a sub-wavelength periodic structure, and the metasurface only reflects the light with target wavelengths and transmits the light with non-target wavelengths, thereby reducing a resonant bandwidth and realizing narrowband filtering. Signal light emitted by the gain medium is converted into parallel light by means of the collimating component and is perpendicularly incident on the metasurface; and a resonant cavity for only resonating and amplifying the light with the target wavelengths is composed of the metasurface and a reflection enhancement film on an outer side of the other end of the gain medium, and oscillates and amplifies laser light while selecting a wavelength of the laser light to finally create lasing, and the laser light is transmitted through the metasurface for being output. The external cavity laser has the advantages of a good wavelength stability, a high side-mode suppression ratio, a narrow linewidth, a great adjustment tolerance, and being manufactured by a simple process.
Inventors:
XIA JINSONG (CN)
ZHU LIANGQIU (CN)
ZENG CHENG (CN)
YUAN SHUAI (CN)
ZHU LIANGQIU (CN)
ZENG CHENG (CN)
YUAN SHUAI (CN)
Application Number:
PCT/CN2018/114702
Publication Date:
January 30, 2020
Filing Date:
November 09, 2018
Export Citation:
Assignee:
UNIV HUAZHONG SCIENCE TECH (CN)
International Classes:
H01S5/14
Foreign References:
| CN207338897U | 2018-05-08 | |||
| CN106483594A | 2017-03-08 | |||
| CN203787763U | 2014-08-20 | |||
| US20170082842A1 | 2017-03-23 | |||
| CN106207749A | 2016-12-07 |
Attorney, Agent or Firm:
HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY PATENT AGENCY CENTER (CN)
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