2021/11/25 by Vyacheslav Li, Li, Vyacheslav, Fritz Diorico +3 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics) #Photonic and Optical Devices #Semiconductor Lasers and Optical Devices
paper · pdf · doi:10.48550/arxiv.2111.13194
openalex publication_date 2021/11/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Lasers with well controlled relative frequencies are indispensable for many applications in science and technology. We present a frequency offset locking method for lasers based on beat frequency discrimination utilizing hybrid electronic LC filters. The method is specifically designed for decoupling the tightness of the lock from the broadness of its capture range. The presented demonstration locks two free running diode lasers at 780 nm with a 5.5 GHz offset. It displays an offset frequency instability below 55 Hz for timescales in excess of 1000 s and a minimum of 12 Hz at 10 s averaging, outperforming the best reported instabilities of methods based on beat frequency discrimination. The performance is complemented with a 190 MHz lock capture range, a tuning range of up to 1 GHz, and a frequency ramp agility of 200 kHz/μs.