基于PDH稳频技术的激光相位噪声前馈消除装置及方法
By using a laser phase noise feedforward cancellation device based on PDH frequency stabilization technology and utilizing the PDH error signal for feedforward control, the problem of poor high-frequency laser phase noise cancellation effect in the prior art is solved, and effective suppression and system stability improvement are achieved over a wide frequency range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TSINGHUA UNIVERSITY
- Filing Date
- 2023-09-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot simultaneously provide good phase noise suppression and high optical power, and are limited by the stability of laser phase noise measurement methods, making it impossible to effectively eliminate high-frequency laser phase noise.
A laser phase noise feedforward cancellation device based on PDH frequency stabilization technology is adopted. It uses the PDH error signal for feedforward control and cancels the phase noise of the laser through a delayed optical path and an electro-optic modulator, thereby achieving effective suppression of high-frequency noise.
It achieves effective suppression of phase noise from hundreds of kilohertz to several megahertz, with a suppression effect of nearly 40dB, improving the long-term stability of the system, and requiring no additional measurement device.
Smart Images
Figure CN117096719B_ABST