A new bound on excess frequency noise in second harmonic generation in PPKTP at the 10^−19 level

Yeaton-Massey, D.; Adhikari, R. X.

doi:10.1364/oe.20.021019

Cited by 13 publications

(11 citation statements)

References 19 publications

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“…We therefore always obtained sufficient power at 771 nm to perform our measurements. In the following, we assume that the second-harmonic generation module does not degrade the ultra-stable laser relative frequency instability [13,14].…”

Section: B Frequency Instability Characterization Setupmentioning

confidence: 99%

Frequency stability of a wavelength meter and applications to laser frequency stabilization

et al. 2015

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Interferometric wavelength meters have attained frequency resolutions down to the MHz range. In particular, Fizeau interferometers, which have no moving parts, are becoming a popular tool for laser characterization and stabilization. In this article, we characterize such a wavelength meter using an ultra-stable laser in terms of relative frequency instability σy(τ ) and demonstrate that it can achieve a short-term instability σy(1s) ≈ 2×10 −10 and a frequency drift of order 10 MHz/day. We use this apparatus to demonstrate frequency control of a near-infrared laser, where a frequency instability below 3×10−10 from 1 s to 2000 s is achieved. Such performance is for example adequate for ions trapping and atoms cooling experiments.

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Section: B Frequency Instability Characterization Setupmentioning

confidence: 99%

Frequency stability of a wavelength meter and applications to laser frequency stabilization

et al. 2015

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“…It is still a value challenging to attain experimentally, as it implies stabilization of the overall optical path to this level. This can be done by combining existing passive solutions (thermal and acoustic shielding) and active solutions (fiberstabilization and free-space path length stabilization) [6].…”

Section: Phase-noise and Instability Measurementsmentioning

confidence: 99%

“…Many state-of-the-art optical clocks rely on a cavity-stabilized laser, frequency-doubled via second harmonic generation (SHG) to produce the laser clock frequency [4], [5]. Other applications requiring SHG and low phase noise at optical frequencies include precision spectroscopy, optical frequency combs [5], and interferometric gravitational waves detectors [6]. For all of those applications, it is necessary to ensure that the SHG setup does not limit the optical signal frequency stability.…”

Section: Introductionmentioning

confidence: 99%

Residual Phase Noise Measurement of Optical Second Harmonic Generation in PPLN Waveguides

Delehaye

Bourgeois

Groult

et al. 2017

IEEE Photon. Technol. Lett.

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Abstract-We report on the characterization, including residual phase noise and fractional frequency instability, of fibercoupled PPLN non-linear crystals. These components are devoted to frequency doubling 871 nm light from an extended-cavity diode laser to produce a 435.5 nm beam, corresponding to the ytterbium ion electric quadrupole clock transition. We measure doubling efficiencies of up to 117.5%/W. Using a Mach-Zehnder interferometer and an original noise rejection technique, the residual phase noise of the doublers is estimated to be lower than − 35 dBrad 2 /Hz at 1 Hz, making these modules compatible with up-to-date optical clocks and ultra-stable cavities. The influence of external parameters such as pump laser frequency and intensity is investigated, showing that they do not limit the stability of the frequency-doubled signal. Our results demonstrate that such compact, fiber-coupled modules are suitable for use in ultra-low phase noise metrological experiments, including transportable optical atomic clocks.

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“…Noise due to the second-harmonic generation process is assumed to be added to the frequency noise of the frequency-doubled laser beam. The upper limit of the noise level is assumed to be 1×10 −5 f Hz/ √ Hz [28]. Laser frequency doubling happens in two places in our experiment: in the AUX laser output and on the PSL beam for the beat note detection.…”

Section: Second-harmonic Generation Noisementioning

confidence: 99%

Multicolor cavity metrology

Izumi¹,

Arai²,

Barr³

et al. 2012

J. Opt. Soc. Am. A

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Long-baseline laser interferometers used for gravitational-wave detection have proven to be very complicated to control. In order to have sufficient sensitivity to astrophysical gravitational waves, a set of multiple coupled optical cavities comprising the interferometer must be brought into resonance with the laser field. A set of multi-input, multi-output servos then lock these cavities into place via feedback control. This procedure, known as lock acquisition, has proven to be a vexing problem and has reduced greatly the reliability and duty factor of the past generation of laser interferometers. In this article, we describe a technique for bringing the interferometer from an uncontrolled state into resonance by using harmonically related external fields to provide a deterministic hierarchical control. This technique reduces the effect of the external seismic disturbances by 4 orders of magnitude and promises to greatly enhance the stability and reliability of the current generation of gravitational-wave detectors. The possibility for using multicolor techniques to overcome current quantum and thermal noise limits is also discussed.

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A new bound on excess frequency noise in second harmonic generation in PPKTP at the 10^−19 level

Cited by 13 publications

References 19 publications

Frequency stability of a wavelength meter and applications to laser frequency stabilization

Frequency stability of a wavelength meter and applications to laser frequency stabilization

Residual Phase Noise Measurement of Optical Second Harmonic Generation in PPLN Waveguides

Multicolor cavity metrology

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