On the performance of wavelength meters: Part 1—consequences for medium-to-high-resolution laser spectroscopy

Verlinde, M.; Dockx, Kristof; Geldhof, S.; König, Kristian; Studer, Dominik; Cocolios, T. E.; Groote, R. P. de; Ferrer, R.; Kudryavtsev, Yu.; Kieck, T.; Moore, I. D.; Nörtershäuser, W.; Raeder, S.; Bergh, P. Van den; Duppen, P. Van; Wendt, Κ.

doi:10.1007/s00340-020-07425-4

Cited by 29 publications

(17 citation statements)

References 35 publications

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“…The amplitude of this relative deviation can be regarded as the lowest uncertainty limit for the precision in case of laser scans. The WS7 behaved similar to the WS7-IR which are also examined in more detail in [14]. The temporal stability of the investigated wavelength meters in a temperature-stabilized room is given for a settling time of 1 h, of 2 days and with automatic calibration.…”

Section: Resultsmentioning

confidence: 93%

“…During every period, the deviation from the real frequency changes quite rapidly: a laser scan by a few 100 MHz can easily lead to nonlinearities in the frequency axis of the order of several MHz. This contradicts the hope for a high relative precision of the wavelength meters in short-ranged scans and is of utmost importance if, e.g., hyperfine structure parameters or isotope shifts are to be extracted from the spectrum as is discussed in a second paper on this topic [14]. In Table 1 the amplitudes of the fluctuations are listed for the investigated wavelength meters in the third row.…”

Section: Coarse Scanmentioning

confidence: 99%

“…Even though they are used in numerous applications, to our knowledge only the long-term stability of wavelength meters has been investigated in detail so far [11,12]. Together with [14] we want to shed light on the reliability during frequency scans which is of special interest in many experiments where only small frequency ranges, e.g., due to isotope shifts [15][16][17] or different Rydberg states [10,18] are investigated. It is expected that the relative precision of wavelength meters is much higher than the absolute accuracy, which is specified by the manufacturer.…”

Section: Introductionmentioning

confidence: 99%

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On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

et al. 2020

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Wavelength meters are widely used for frequency determinations and stabilization purposes since they cover a large wavelength range, provide a high read-out rate and have specified accuracies of up to 10 −8 . More accurate optical frequency measurements can be achieved with frequency combs but only at the price of considerably higher costs and complexity. In the context of precise and accurate frequency determinations for high-resolution laser spectroscopy, the performance of five different wavelength meters was quantified with respect to a frequency comb. The relative precision as well as the absolute accuracy has been investigated in detail, allowing us to give a sophisticated uncertainty margin for the individual instruments. We encountered a prominent substructure on the deviation between both device types with an amplitude of a few MHz that is repeating on the GHz scale. This finally limits the precision of laser scans which are monitored and controlled with wavelength meters. While quantifying its uncertainty margins, we found a high temporal stability in the characteristics of the wavelength meters which enables the preparation of wavelength-dependent adjustment curves for wide-and short-ranged scans. With this method, the absolute accuracy of wavelength meters can be raised up to the MHz level independently from the wavelength of the reference laser used for calibrating the device. Since this technique can be universally applied, it can lead to benefits in all fields of wavelength meter applications.

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Section: Resultsmentioning

confidence: 93%

Section: Coarse Scanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

et al. 2020

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“…Both lasers have an external reference cavity to ensure short-term stability. To ensure long-term wavelength stability, these reference cavities can in turn be locked to a HighFinesse WSU-10 wavemeter using a builtin software plug-in or to a frequency-stabilized HeNe laser using a transfer cavity [7]. The (frequency-doubled) laser light required for the atomic transitions studied in this work is [8] focused into a 1 mm spot in front of the PMT using a telescope system.…”

Section: Methodsmentioning

confidence: 99%

Collinear laser spectroscopy of stable palladium isotopes at the IGISOL facility

et al. 2020

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Collinear laser spectroscopy on stable palladium isotopes was performed at the IGISOL facility in Jyväskylä in preparation for an experiment on its neutron-rich isotopes. Five transitions from different initial atomic states were tested, with the goal of finding the most spectroscopically efficient. The observed intensities afforded a comparison with atomiclevel population predictions based on charge-exchange calculations. For some transitions hyperfine parameters of 105 Pd were measured, which were found to be in good agreement with literature values. A King plot analysis was performed using the measured isotope shifts and known charge radii from literature to determine the atomic field and mass shift factors.

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“…In our previous experiments, frequency locking of the emitted NesCOPO radiation has been achieved with variations in the low MHz range over serval minutes [40]. However, these results were obtained by locking the signal frequency with a commercial wavemeter, which is prone to bias and can display frequency drifts if not calibrated regularly [55].…”

Section: Nescopo Frequency Locking By Wavemetermentioning

confidence: 99%

High Energy Parametric Laser Source and Frequency-Comb-Based Wavelength Reference for CO2 and Water Vapor DIAL in the 2 µm Region: Design and Pre-Development Experimentations

et al. 2021

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We present a differential absorption lidar (DIAL) laser transmitter concept designed around a Nested Cavity Optical Parametric Oscillator (NesCOPO) based Master Oscillator Power Amplifier (MOPA). The spectral bands are located around 2051 nm for CO2 probing and 1982 nm for H216O and HD16O water vapor isotopes. This laser is aimed at being integrated into an airborne lidar, intended to demonstrate future spaceborne instrument characteristics: high-energy (several tens of mJ nanosecond pulses) and high optical frequency stability (less than a few hundreds of kHz long term drift). For integration and efficiency purposes, the proposed design is oriented toward the use of state-of-the-art high aperture periodically poled nonlinear materials. This approach is supported by numerical calculations and preliminary experimental validations, showing that it is possible to achieve energies in the 40–50 mJ range, reaching the requirement levels for spaceborne Integrated Path Differential Absorption (IPDA) measurements. We also propose a frequency referencing technique based on beat note measurement of the laser signal with a self-stabilized optical frequency comb, which is expected to enable frequency measurement precisions better than a few 100 kHz over tens of seconds integration time, and will then be used to feed the cavity locking of the NesCOPO.

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On the performance of wavelength meters: Part 1—consequences for medium-to-high-resolution laser spectroscopy

Cited by 29 publications

References 35 publications

On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

Collinear laser spectroscopy of stable palladium isotopes at the IGISOL facility

High Energy Parametric Laser Source and Frequency-Comb-Based Wavelength Reference for CO2 and Water Vapor DIAL in the 2 µm Region: Design and Pre-Development Experimentations

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