Systematic Frequency Shifts in Bi-color Tm Optical Clock

2021 ◽  
Author(s):  
A. Golovizin ◽  
D. Tregubov ◽  
E. Fedorova ◽  
D. Mishin ◽  
D. Provorchenko ◽  
...  
Keyword(s):  
Optical Clock ◽  
Frequency Shifts

scholarly journals Compensation of field-induced frequency shifts in Ramsey spectroscopy of optical clock transitions

JETP Letters ◽  
2010 ◽  
Vol 90 (11) ◽  
pp. 713-717 ◽  
Author(s):  
A. V. Taichenachev ◽  
V. I. Yudin ◽  
C. W. Oates ◽  
Z. W. Barber ◽  
N. D. Lemke ◽  
...  
Keyword(s):  
Optical Clock ◽  
Frequency Shifts

scholarly journals Simultaneous bicolor interrogation in thulium optical clock providing very low systematic frequency shifts

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Artem A. Golovizin ◽  
Dmitry O. Tregubov ◽  
Elena S. Fedorova ◽  
Denis A. Mishin ◽  
Daniil I. Provorchenko ◽  
...  
Keyword(s):  
Optical Clock ◽  
Decimal Digit ◽  
Relative Uncertainty ◽  
Frequency Shifts ◽  
External Perturbations ◽  
Simultaneous Protocol ◽  
Zeeman Shift ◽  
Increasing Demand ◽  
Averaging Time ◽  
Low Sensitivity

AbstractOptical atomic clocks have already overcome the eighteenth decimal digit of instability and uncertainty, demonstrating incredible control over external perturbations of the clock transition frequency. At the same time, there is an increasing demand for atomic (ionic) transitions and new interrogation and readout protocols providing minimal sensitivity to external fields and possessing practical operational wavelengths. One of the goals is to simplify the clock operation while maintaining the relative uncertainty at a low 10−18 level achieved at the shortest averaging time. This is especially important for transportable and envisioned space-based optical clocks. Here, we demonstrate implementation of a synthetic frequency approach for a thulium optical clock with simultaneous optical interrogation of two clock transitions. Our experiment shows suppression of the quadratic Zeeman shift by at least three orders of magnitude. The effect of the tensor lattice Stark shift in thulium can also be reduced to below 10−18 in fractional frequency units. This makes the thulium optical clock almost free from hard-to-control systematic shifts. The “simultaneous” protocol demonstrates very low sensitivity to the cross-talks between individual clock transitions during interrogation and readout.

scholarly journals Evaluation of trap-induced systematic frequency shifts for a multi-ion optical clock at the 10−19level

2016 ◽  
Vol 723 ◽  
pp. 012027 ◽  
Author(s):  
J Keller ◽  
T Burgermeister ◽  
D Kalincev ◽  
J Kiethe ◽  
T E Mehlstäubler
Keyword(s):  
Optical Clock ◽  
Frequency Shifts

scholarly journals Patch antenna sensor for wireless ice and frost detection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryan Kozak ◽  
Kasra Khorsand ◽  
Telnaz Zarifi ◽  
Kevin Golovin ◽  
Mohammad H. Zarifi
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Wide Band ◽  
Power Lines ◽  
Ice Thickness ◽  
Ice Accretion ◽  
Robust Method ◽  
Frequency Shifts ◽  
Resonant Amplitude ◽  
Recorded Data

AbstractA patch antenna sensor with T-shaped slots operating at 2.378 GHz was developed and investigated for wireless ice and frost detection applications. Detection was performed by monitoring the resonant amplitude and resonant frequency of the transmission coefficient between the antenna sensor and a wide band receiver. This sensor was capable of distinguishing between frost, ice, and water with total shifts in resonant frequency of 32 MHz and 36 MHz in the presence of frost and ice, respectively, when compared to the bare sensor. Additionally, the antenna was sensitive to both ice thickness and the surface area covered in ice displaying resonant frequency shifts of 2 MHz and 8 MHz respectively between 80 and 160 μL of ice. By fitting an exponential function to the recorded data, the freezing rate was also extracted. The analysis within this work distinguishes the antenna sensor as a highly accurate and robust method for wireless ice accretion detection and monitoring. This technology has applications in a variety of industries including the energy sector for detection of ice on wind turbines and power lines.

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