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Control of pulse velocity and dispersion in mode-locked lasers (Conference Presentation)
Author(s): Jean-Claude M. Diels; Matthias Lenzner; James Hendrie; Ning Hsu; Luke Horstman; Hanieh Afkhamiardakani; Ladan Arissian
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Paper Abstract

Frequency combs are revolutionizing metrology, providing a link between optical and RF fre- quencies. The cavity of a mode-locked laser determines the wavelength of a particular comb tooth, and the teeth spacing. It is demonstrated experimentally that the average tooth spacing of a frequency comb can be tuned by tilting an etalon inserted in the cavity. This pro- perty amounts to a control of the average group velocity of a pulse circulating in the resonator. We have shown that a mode-locked laser in which two pulses circulate constitutes a sensitive phase sensor. This is because any phase shift between the two pulses is converted into a frequency shift, equal to the ratio of the phase shift to the cavity round-trip time at the phase velocity. The two frequency combs issued from the laser are split in frequency, a split measured as a beat note on a detector recording the interfering combs. A laser gyro is an example of such an Intracavity Phase Interferometer. A structure with periodic discrete resonances matching several teeth of the comb will, because of the dispersion associated with the resonances, decrease or increase the beat note, since the split combs will see different cavity round-trip times. Such reso- nant structures that applies to multiple teeth of the comb can be passive resonators (Fabry-Perot) in transmission or reflection, narrow atomic two-photon resonances, phase matched frequency dou- blers, etc. . . . Experimental demonstrations will be presented. No correlation is observed between pulse velocity and beat note enhancement/reduction.

Paper Details

Date Published: 4 March 2019
Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109340C (4 March 2019); doi: 10.1117/12.2514644
Show Author Affiliations
Jean-Claude M. Diels, Univ. of New Mexico (United States)
Matthias Lenzner, Lenzner Research, LLC (United States)
James Hendrie, Univ. of New Mexico (United States)
Ning Hsu, Univ. of New Mexico (United States)
Luke Horstman, Univ. of New Mexico (United States)
Hanieh Afkhamiardakani, Univ. of New Mexico (United States)
Ladan Arissian, Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 10934:
Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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