2019/09/05 by Ashby P. Hilton, P. S. Light, Hilton, Ashby P. +5
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Fiber Optic Sensors #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics) #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.1909.02693
openalex publication_date 2019/09/05 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Self-heterodyne fiber interferometers have been shown to be capable of\nstabilizing lasers to ultra-narrow linewidths and present an excellent\nalternative to high finesse cavities for frequency stabilization. In addition\nto suppressing frequency noise, these devices are highly tunable, and can be\nmanipulated to produce high speed frequency sweeps over the entire range of the\nlaser. We present an analytic approach for choosing a delay-line length for\nboth optimal noise suppression and highest in-loop frequency sweep rate. Using\nthis model we have implemented a fiber-based active Michelson interferometer as\na frequency discriminator for a conventional diode laser and demonstrated a\nlinewidth of 700 Hz over millisecond timescales. We also demonstrate a\nfrequency scan rate of 1 THz/s and independently measure the maximum deviation\nin frequency from the linear sweep to be 100 kHz, predominantly limited by\nacoustic resonances in the apparatus.\n