一种基于宇称-时间对称的单纵模布里渊掺铒光纤激光器
By introducing a parity-time symmetric PT system into a Brillouin fiber laser and using a polarization controller to enhance the gain difference between the dominant mode and the side modes, the shortcomings of existing fiber lasers in terms of narrow linewidth and stability are solved, achieving high-power, ultra-narrow linewidth single longitudinal mode output, which is suitable for fiber optic sensing and radar communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONGBEI UNIV
- Filing Date
- 2025-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing Brillouin fiber lasers have shortcomings in terms of narrow linewidth and stability, and multi-mode suppression technology is complex and costly, making it difficult to operate stably over a wide wavelength range.
A single-longitudinal-mode Brillouin erbium-doped fiber laser based on parity-time symmetry is adopted. By cascading a ring cavity with a PT-symmetric system, PT symmetry of the polarization state is achieved using a polarization controller, which enhances the gain difference between the main mode and the side modes, forms an independent tunable polarization loop, and suppresses multi-longitudinal-mode competition.
It achieves high-power, ultra-narrow linewidth single-longitudinal-mode output, with a simple structure and good stability, and is suitable for applications requiring narrow linewidth lasers, such as fiber optic sensing and radar communication.
Smart Images
Figure CN120389270B_ABST