Work

FPGA‐Integrated Digital Locking Scheme for Mode‐Locked Fiber Lasers

Year: 2025

Type: article

Abstract: ABSTRACT This work demonstrates a simplified and compact locking scheme for a mode‐locked laser (MLL) operating at a repetition rate of 111.13 MHz, using a rubidium (Rb) clock as the reference. The proposed system eliminates the need for bulky frequency synthesizers and commercial equipment by employing fully digital signal processing on an field programmable gate array. Using this locking system enclosed in the 13.5 × 10.5 cm case, experimental results show that an Allan deviation of 1.8 × 10−12 at 1 s can be achieved, representing a five‐order‐of‐magnitude improvement over the free‐running MLL. The system also supports agile frequency tuning within the tuning range of the MLL. This design paves the way for cost‐effective, compact solutions for precision frequency comb stabilization.

Source: Microwave and Optical Technology Letters

DOI: 10.1002/mop.70193

Authors: Ziye Wang, Yanqing Shi, Weiqian Zhao

Institutions: Jiangsu University of Science and Technology, Tianjin University

Language: English

Topic: Advanced Fiber Laser Technologies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Award: G2460810411