Title:
NARROW-LINEWIDTH SINGLE-FREQUENCY LIGHT SOURCE
Document Type and Number:
WIPO Patent Application WO/2020/155248
Kind Code:
A1
Abstract:
The present application provides a narrow-linewidth single-frequency light source, comprising a pumping unit; a resonant cavity, the resonant cavity comprising a gain optical fiber used for obtaining excitation light by means of excitation of pumping light; and a filtering unit used for filtering laser light in the resonant cavity to obtain narrow-band laser light, the bandwidth of the filtering unit being smaller than the longitudinal mode interval of the resonant cavity so as to obtain narrow-linewidth single-frequency laser light, and the filtering unit being directly inscribed on the gain optical fiber. The filtering unit is directly inscribed on the gain optical fiber, so that the length of a single-mode optical fiber attached to a filter grating can be saved, the clamping length of a clamp is also saved, the cavity length is shortened, the longitudinal mode interval is further increased, a single longitudinal mode is facilitated to be obtained, and the light source is simple in structure and good in laser light output stability; moreover, the effective gain cavity length is increased, and therefore, even when the total cavity length is shortened, the gain cavity length can still be increased, and the power of a laser can be increased, thereby solving the problem that line width and power cannot be taken into consideration simultaneously.
Inventors:
WEN QIAO (CN)
SUN ZHIHAO (CN)
SUN ZHIHAO (CN)
Application Number:
PCT/CN2019/076147
Publication Date:
August 06, 2020
Filing Date:
February 26, 2019
Export Citation:
Assignee:
UNIV SHENZHEN (CN)
International Classes:
H01S3/067; H01S3/08
Foreign References:
| CN109149330A | 2019-01-04 | |||
| CN108879307A | 2018-11-23 | |||
| US8462426B1 | 2013-06-11 |
Other References:
DU YONG; LIUJIAN-JUN: "Tunable Single Frequency Fiber Laser Based on two FBG-FP Filters", JOURNAL OF SHAOYANG UNIVERSITY (NATURAL SCIENCE EDITION), vol. 12, no. 4, 31 December 2015 (2015-12-31), CN, pages 24 - 30, XP009522470, ISSN: 1672-7010
Attorney, Agent or Firm:
SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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