optical frequency comb technique

physics

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July 17, 2026

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The optical frequency comb technique is a physics method that uses ultrashort laser pulses to create a series of precisely spaced frequency peaks, resembling the teeth of a comb. This technique, pioneered by Theodor W. Hänsch, allows for highly accurate measurements of optical frequencies, with precision up to 15 digits.

This breakthrough has led to practical applications such as improving satellite navigation systems like GPS and synchronizing computer networks. It also enables physicists to test fundamental theories, including Albert Einstein's theory of special relativity, and to verify the constancy of physical constants over time.1

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John L. Hall
…developing Hänsch’s idea for the optical frequency comb technique. In the technique, ultrashort pulses of laser light create a set of precisely spaced frequency peaks that resemble the evenly spaced teeth of a hair comb, thereby providing a practical way of obtaining optical frequency measurements to an accuracy of 15…
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…developing Hänsch’s idea for the optical frequency comb technique. In the technique, ultrashort pulses of laser light create a set of precisely spaced frequency peaks that resemble the evenly spaced teeth of a hair comb, thereby providing a practical way of obtaining optical frequency measurements to an accuracy of 15…
Read More

Theodor W. Hänsch
…originated the idea for the optical frequency comb technique, in which ultrashort pulses of laser light create a set of precisely spaced frequency peaks that resemble the evenly spaced teeth of a hair comb. The technique offered a practical way of obtaining optical frequency measurements to an accuracy of 15…
Read More
…originated the idea for the optical frequency comb technique, in which ultrashort pulses of laser light create a set of precisely spaced frequency peaks that resemble the evenly spaced teeth of a hair comb. The technique offered a practical way of obtaining optical frequency measurements to an accuracy of 15…
Read More