Control of pulse velocity and dispersion in mode-locked lasers (Conference Presentation)

Jean-Claude M. Diels; Matthias Lenzner; James Hendrie; Ning Hsu; Luke Horstman; Hanieh Afkhamiardakani; Ladan Arissian

doi:10.1117/12.2514644

4 March 2019 Control of pulse velocity and dispersion in mode-locked lasers (Conference Presentation)

Jean-Claude M. Diels, Matthias Lenzner, James Hendrie, Ning Hsu, Luke Horstman, Hanieh Afkhamiardakani, Ladan Arissian

Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 109340C (2019) https://doi.org/10.1117/12.2514644
Event: SPIE OPTO, 2019, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Jean-Claude M. Diels, Matthias Lenzner, James Hendrie, Ning Hsu, Luke Horstman, Hanieh Afkhamiardakani, and Ladan Arissian "Control of pulse velocity and dispersion in mode-locked lasers (Conference Presentation)", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109340C (4 March 2019); https://doi.org/10.1117/12.2514644

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KEYWORDS

Mode locking

Dispersion

Teeth

Pulsed laser operation

Beam controllers

Frequency combs

Fabry–Perot interferometers

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