Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Fiber Sources and Applications Group

The group's primary thrusts are the development and application of fiber-laser frequency combs to optical clocks, frequency transfer, ranging, and precision spectroscopy. Specific recent work includes development of a robust, fieldable frequency comb, synchronization of distant clocks to femtosecond timing, and the application of “dual-comb spectroscopy” to atmospheric gas detection across open paths.

Optical frequency combs convert a laser source containing a single frequency of light into pulses that include thousands of frequencies. This project aims to develop the technology for a growing list of applications. Using a comb working at optical telecommunications wavelengths, project physicists have transmitted signals from next-generation optical atomic clocks across hundreds of kilometers. They have demonstrated how pairs of combs can increase by a factor of one hundred the speed of infrared spectroscopy for chemical analysis, while also enhancing sensitivity. Frequency combs also promise to provide extremely accurate distance measurements and to assess the quality of high-speed telecommunications signals with unprecedented precision.

Press Coverage

Combing a Herd for Methane Emissions

American Physical Society
Specialized light beams called frequency combs could help detect greenhouse-gas emissions from livestock with greater precision than existing methods.

News and Updates

Projects and Programs

Fiber Sources and Applications

Optical frequency combs convert a laser source containing a single frequency of light into pulses that include thousands of frequencies. This project aims to

Publications

Femtosecond Time Synchronization of Optical Clocks Off a Flying Quadcopter

Author(s)
Hugo Bergeron, Laura C. Sinclair, William C. Swann, Isaac H. Khader, Kevin C. Cossel, Michael A. Cermak, Jean-Daniel Deschenes, Nathan R. Newbury
Optical clock networks promise advances in global navigation, time distribution, coherent sensing, relativity experiments, dark matter searches and other areas1

Femtosecond Optical Two-Way Time-Frequency Transfer in the Presence of Motion

Author(s)
Laura C. Sinclair, Hugo Bergeron, William C. Swann, Isaac H. Khader, Kevin C. Cossel, Michael A. Cermak, Nathan R. Newbury, Jean-Daniel Deschenes
Platform motion poses significant challenges to high-precision optical time and frequency transfer. We give a detailed description of these challenges and their

Software

Awards

2019 PECASE - Laura Sinclair

The Presidential Early Career Award for Scientists and Engineers (PECASE) is the highest honor bestowed by the United States Government to...

Contacts

Group Leader (1st) and Project Leaders