Simultana disperzivna interakcija više linija frekventnog češlja s hladnim atomskim oblakom

master's thesis

• Title (english): Simultaneous dispersive interaction of multiple frequency comb lines with a cold atomic cloud
• Author: Lovre Kardum
• Mentor: Neven Šantić (mentor)
• Mentor: Vedran Đerek (komentor)
• Committee member: Vedran Đerek (predsjednik povjerenstva)
• Committee member: Neven Šantić (član povjerenstva)
• Committee member: Marinko Jablan (član povjerenstva)
• Committee member: Hrvoje Buljan (član povjerenstva)
• Committee member: Marko Tomislav Cvitaš (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Physics); Zagreb
• Defense date and country: 2024-09-06, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract

U ovom diplomskom radu proučavan je linearni disperzivni režim interakcije više linija frekventnog češlja s hladnim atomima rubidija unutar optičkog rezonatora. U svrhu promatranja pojedinih linija frekventnog češlja sastavljen je novi dio postava u kojem se stvaraju udari između zrake transmitirane kroz rezonator i kontinuiranog lasera. Mjerenja spektra i signala pojedinih linija potvrdila su da ovakva interakcija dovodi do pomicanja modova optičkog rezonatora. Iz izmjerenih vrijednosti lightshifta određen je broj atoma unutar struka rezonatora za interakciju s različitim linijama. Dobivene vrijednosti međusobno su konzistentne za linije koje se nalaze s iste strane Rb rezonance te je dano moguće objašnjenje za odstupanja dobivena za linije s različitih strana rezonance. Detaljnije je proučena ovisnost transmitirane amplitude jedne linije frekventnog češlja o detuningu pri čemu je uočeno da amplituda ovisi o smjeru promjene detuninga.

Abstract (english)

In this thesis, we studied linear dispersive regime of interaction between multiple frequency comb lines and cold rubidium atoms inside an optical cavity. To observe individual frequency comb lines, we built a new part of the experimental setup, in which beats are created between a beam transmitted through the cavity and a continuous wave laser. Measurements of the spectrum and individual line signals confirmed that this type of interaction leads to a frequency shift of cavity modes. Using lightshift measurements we determined the number of atoms inside the cavity waist for interactions with different comb lines. The obtained values are mutually consistent for comb lines located on the same side of the Rb resonance, and a possible explanation was proposed for the deviations observed for the lines on the opposite sides of the Rb resonance. The dependence of transmitted amplitude on detuning was studied in more detail for one frequency comb line, and it was observed that the amplitude depends on the direction of the detuning change.

• Keywords: frekventni češalj; hladni atomi; optički rezonator
• Keywords (english): frequency comb; cold atoms; optical cavity
• Language: croatian
• URN:NBN: urn:nbn:hr:217:667431
• Study programme: Title: The University Integrated Undergraduate and Graduate Programme in Physics; Research Physics; specializations in: Research Physics; Course: Research Physics; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: sveučilišni magistar fizike (sveučilišni magistar fizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-01-30 13:42:57