Multi-wavelength narrow-linewidth single-frequency optical fiber laser source for laser radar system

US10693274B2 · kind B2 · utility

Assignee

• South China University of Technology · CN

Inventors

• Shanhui Xu · Tangxia, CN
• Zhongmin Yang · Longbeilingcun, CN
• Yuning Zhang · Longbeilingcun, CN
• Zhouming Feng · Longbeilingcun, CN
• Changsheng Yang · 流花街道, CN

Key dates

• Filing date: Dec 19, 2016
• Grant date: Jun 23, 2020
• Expiry date: Dec 19, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/50
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multi-wavelength single-frequency optical fiber laser source for a laser radar system includes a resonant cavity composed of a high-reflectivity chirped optical fiber grating, a high gain optical fiber and a low-reflectivity chirped optical fiber grating, a single-mode semiconductor pump laser served as a pump light source, an optical wavelength division multiplexer, an optical coupler, an optical isolator, an optical circulator, an optical filter module, and a semiconductor optical amplifier. The pump light source performs optical fiber core pumping with respect to the high gain optical fiber. A portion of the wide-spectrum laser is filtered by the optical filter module to obtain a wavelength corresponding to a specific central frequency. 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.