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Spectral Hole Burning for Ultra-stable Lasers

Abstract : Spectral hole burning in rare-earth ion doped crystals is a versatile system in time-frequency metrology and related applications. On one hand, narrow optical transitions of the dopant ions can serve as a frequency reference for laser stabilization. The expected fractional frequency stability can potentially be orders of magnitude better than cavity-locked lasers at the state of the art. On the other hand, mechanical constraints can distort the crystalline structure, thereby shifting the frequency of the transition in the dopant ions. Probing such a transition near resonance allows for opto-mechanical coupling and the realization of novel hybrid quantum systems.The aim this thesis project is to improve the techniques of laser frequency stabilization, and explore the fundamental limits of such techniques. Much work has been devoted to the development of ultra-low-noise detection techniques, which allows to get lower detection noise by employing different spectral structures. The magic environment has been explored, where the effect on spectral holes from temperature fluctuation and applied pressure can be compensated achieving a first order global cancellation. The experiment carried out with magic environment is expected to let the spectral hole has ultra-narrow linewidth and unprecedented immunity to thermal noise and fluctuations. Moreover, the spectral holes sensitivity towards the uni-axial stress and external E-field have been characterized, so that the effect on the laser frequency fluctuation could be deduced and minimized. The application of spectral hole burning experiments in the micro-mechanical resonator has been investigated in order to study the opto-mechanical coupling. The underlying physics will probably shed light on the possibility of realizing atomic-scale force sensors in our system.
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Submitted on : Thursday, November 24, 2022 - 3:32:07 PM
Last modification on : Friday, November 25, 2022 - 4:01:41 AM


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  • HAL Id : tel-03870065, version 1


Shuo Zhang. Spectral Hole Burning for Ultra-stable Lasers. Astrophysics [astro-ph]. Université Paris sciences et lettres, 2022. English. ⟨NNT : 2022UPSLO004⟩. ⟨tel-03870065⟩



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