Operation of an optically coherent frequency comb outside the metrology lab

Published: March 13, 2014


Laura C. Sinclair, Ian R. Coddington, William C. Swann, Archita Hati, Kana Iwakuni, Nathan R. Newbury


Frequency combs can support cutting-edge measurements in areas that include optical clocks and oscillators, high-accuracy frequency and time transfer, precision spectroscopy from the UV to THz regimes, high-accuracy LIDAR, precise microwave photonics, and the search for exoplanets. However, current high performance combs are restricted to the well-controlled optical lab, which greatly restricts their adoption to these and other applications. Here we demonstrate a self-referenced fiber frequency comb design that can operate outside of the laboratory. The frequency comb has residual optical linewidths of < 1 Hz, sub-radian residual optical phase noise, and residual pulse-to-pulse timing jitter of 2.4 - 5 fs, when locked to an optical reference. This fully phase-locked frequency comb has been successfully operated in a moving vehicle with 0.5 g peak accelerations and on a shaker table with a sustained 0.5 g rms integrated acceleration, while retaining its optical coherence and 5-fs-level timing jitter.
Citation: Optics Express
Volume: 22
Pub Type: Journals


fiber comb, frequency comb, precision measurement
Created March 13, 2014, Updated November 10, 2018