Fiber-laser frequency combs with subhertz relative linewidths

Published

October 15, 2006

Author(s)

William C. Swann, John J. McFerran, Ian R. Coddington, Nathan R. Newbury, Ingmar Hartl, Martin E. Fermann, Paul S. Westbrook, Jeffrey W. Nicholson, K Feder, Carston Langrock, Martin M. Fejer

Abstract

We investigate the comb linewidths of self-referenced, fiber-laser-based frequency combs by measuring the heterodyne beat signal between two independent frequency combs that are phase locked to a common cw optical reference. We demonstrate that the optical comb lines can exhibit instrument-limited, subhertz relative linewidths across the comb spectra from 1200 to 1720 nm with a residual integrated optical phase jitter of 1 rad in a 60 mHz to 500 kHz bandwidth. The projected relative pulse timing jitter is 1 fs. This performance approaches that of Ti:sapphire frequency combs.

Citation

Optics Letters

Volume

31

Issue

20

Pub Type

Journals

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Keywords

Fiber laser frequency combs, narrow linewidth lasers

Citation

Swann, W. , McFerran, J. , Coddington, I. , Newbury, N. , Hartl, I. , Fermann, M. , Westbrook, P. , Nicholson, J. , Feder, K. , Langrock, C. and Fejer, M. (2006), Fiber-laser frequency combs with subhertz relative linewidths, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32330 (Accessed October 9, 2025)