A Reconfigurable Architecture for Continuous Double-Sided Swept-Laser Linearization

• DOI: 10.1109/jlt.2020.2999825
• Publication Date: 2020-06-05T20:38:51Z
• Authors: Zheyi Yao; Zhenyu Xu; Thomas Mauldin; Gerald Hefferman; Tao Wei
• Keywords: Linearization; Linearity

This paper reports a reconfigurable architecture to generate and maintain the linearity of frequency-swept semiconductor lasers for both current rising (up-sweep) falling (down-sweep) edges, respectively. method combines passive active controls achieve high frequency-sweep using an integrated digital architecture. Both control utilize same feedback-the interferometric signal laser's output-which has frequency proportional laser velocity. is highly reconfigurable, allowing key parameters be changed, including sweep velocity, tuning range, duration, making it versatile flexible approach suitable range variety applications. was implemented on FPGA validate concept evaluate its performance. By precisely tracking feedback signal, found that this allowed phase error less than π/2 within regions interest at different velocities up-sweep down-sweep cycles. Given delay length interferometer 226 ns, instantaneous optical 0.12% 1552 nm.