Title:
MULTI-WAVELENGTH NARROW-LINEWIDTH SINGLE-FREQUENCY OPTICAL FIBER LASER SOURCE FOR LASER RADAR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/072295
Kind Code:
A1
Abstract:
Provided is a multi-wavelength single-frequency optical fiber laser source for a laser radar system, comprising: a resonant cavity composed of a high-reflectivity chirped optical fiber grating (1), a high gain optical fiber (2), and a low-reflectivity chirped optical fiber grating (3); a single-mode semiconductor pump laser (5) as a pump light source; an optical wavelength division multiplexer (4); an optical coupler (6); an optical isolator (7); an optical circulator (8); an optical filter module (9); and a semiconductor optical amplifier (10). The pump light source performs optical fiber core pumping with respect to the high gain optical fiber (2). Wide-spectrum laser light output from the optical wavelength division multiplexer (4) is split by the optical coupler (6), and then a portion of the wide-spectrum laser light enters into the optical filter module (9) via the optical circulator (8), and is filtered by the optical filter module (9) to obtain a wavelength corresponding to a specific central frequency. The laser light returns into the resonant cavity via the optical circulator (8) and the optical coupler (6), to implement self-injection locking on the resonant cavity. Multi-wavelength laser lasing with a narrow linewidth and single longitudinal mode is implemented by combining a short linear resonant cavity structure and the optical filter module (9), and ultimately a stable multi-wavelength output and multi-wavelength single-frequency laser output meeting laser radar standards are realized.
Inventors:
XU SHANHUI (CN)
YANG ZHONGMIN (CN)
ZHANG YUNING (CN)
FENG ZHOUMING (CN)
YANG CHANGSHENG (CN)
YANG ZHONGMIN (CN)
ZHANG YUNING (CN)
FENG ZHOUMING (CN)
YANG CHANGSHENG (CN)
Application Number:
PCT/CN2016/110654
Publication Date:
April 26, 2018
Filing Date:
December 19, 2016
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
H01S3/067; H01S3/098; H01S3/13
Foreign References:
| CN105428973A | 2016-03-23 | |||
| CN105932530A | 2016-09-07 | |||
| CN101013792A | 2007-08-08 | |||
| CN101572375A | 2009-11-04 | |||
| CN104218437A | 2014-12-17 | |||
| CN103972772A | 2014-08-06 | |||
| US20050053101A1 | 2005-03-10 | |||
| US20080317071A1 | 2008-12-25 |
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY (CN)
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