A tunable frequency-offset-locked laser system for cooling neutral atomic gases
| dc.contributor.advisor | Barrett, Brynle | |
| dc.contributor.author | Shalaby, Kamal A | |
| dc.date.accessioned | 2025-07-03T14:52:30Z | |
| dc.date.available | 2025-07-03T14:52:30Z | |
| dc.date.issued | 2025-04 | |
| dc.description.abstract | Ultra-stable lasers are essential for quantum technologies, requiring precise control and agile frequency tuning. This thesis develops a modular laser locking architecture based on offset frequency locking (OFL) for a quantum gravimeter utilizing cold 87Rb atoms. Two OFL systems stabilize 1560 nm Slave lasers, frequency-doubled to 780 nm, by locking them to an ultra-stable 780 nm Master laser. From the beat frequency, the system uses a broadband frequency divider, a linear frequency-to-voltage converter, and an analog PID controller to achieve a broad locking range. We achieve a frequency-locking stability with an Allan deviation that reaches 3.10 kHz at 200 s, and a frequency agility of 250 MHz/ms. We use this system to generate sub-Doppler-cooled samples of 87Rb atoms and perform high-sensitivity spectroscopy of the 5P3/2 hyperfine excited states. These spectra enabled us to perform an absolute optical frequency calibration of the OFL system. | |
| dc.description.copyright | © Kamal A. Shalaby, 2025 | |
| dc.format.extent | xii, 139 | |
| dc.format.medium | electronic | |
| dc.identifier.uri | https://unbscholar.lib.unb.ca/handle/1882/38329 | |
| dc.language.iso | en | |
| dc.publisher | University of New Brunswick | |
| dc.rights | http://purl.org/coar/access_right/c_abf2 | |
| dc.subject.discipline | Physics | |
| dc.title | A tunable frequency-offset-locked laser system for cooling neutral atomic gases | |
| dc.type | master thesis | |
| oaire.license.condition | other | |
| thesis.degree.discipline | Physics | |
| thesis.degree.grantor | University of New Brunswick | |
| thesis.degree.level | masters | |
| thesis.degree.name | M.Sc. |