@proceedings{12321,
  author = {Juan Silva and Julia Cline and James Thompson and Matthew Norcia},
  editor = {Selim Shahriar and Jacob Scheuer},
  title = {An active optical frequency reference using a pulsed superradiant laser},
  abstract = { We will describe a next-generation active atomic frequency reference based on super-radiant pulses of laser light from the ultra-narrow, 1 mHz linewidth, optical clock transition in an ensemble of cold 87Sr atoms. Light is stimulated from the millihertz linewidth transition by confining an ensemble of laser cooled atoms inside of a high finesse optical cavity. Such a light source has been proposed as a next-generation active atomic frequency reference, with the potential to enable high-precision optical frequency references to be used outside laboratory environments. We achieve a remarkable short term fractional frequency stability, 6.7 × 1016 at 1 s of averaging, absolute accuracy, 2 Hz (4 × 1015 fractional frequency), and high insensitivity to changes in the cavity length that limits the performance of todays more stable lasers. We will also discuss current work on cavity-enhanced dispersive measurements to perform high resolution spectroscopy and atom counting. },
  year = {2019},
  journal = {Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology},
  month = {2019-03},
  publisher = {SPIE},
  address = {San Francisco},
  isbn = {9781510625105},
  doi = {10.1117/12.2515582},
}