Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements
Abstract
Narrow-linewidth lasers are important to many applications spanning precision metrology to sensing systems. Characterization of these lasers requires precise measurements of their frequency noise spectra. Here we demonstrate a correlated self-heterodyne (COSH) method capable of measuring frequency noise as low as 0.01 Hz2/Hz at 1 MHz offset frequency. The measurement setup is characterized by both commercial and lab-built lasers, and features low optical power requirements, fast acquisition time and high intensity noise rejection.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 27, 2022
- Source ID
- 10.1364/oe.458109
Entities
People
- Avi Feshali
- Bohan Li
- Boqiang Shen
- Heming Wang
- John E. Bowers
- Kerry Vahala
- Lin Chang
- Maodong Gao
- Mario Paniccia
- Peng Liu
- Warren Jin
- Zhiquan Yuan
Organizations
- Air Force Office of Scientific Research
- California Institute of Technology
- Defense Advanced Research Projects Agency
- Peking University
- University of California, Santa Barbara