A Stand-Alone 'Self-Locking' Laser
|dc.contributor.advisor||Andersen, Mikkel F.|
|dc.identifier.citation||Cowdell, C. (2017). A Stand-Alone ‘Self-Locking’ Laser (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/7547||en|
|dc.description.abstract||This dissertation presents a stand-alone ’self-locking’ laser. The aim of the project was to develop a prototype of a ’self -locking’ laser that requires no user input, other than to turn the laser on. The prototype was developed to be used as a repump laser for laser cooling experiments; however, its design is aimed at a market of individuals who do not have the background skills required to lock a laser. The project uses a frequency modulated spectroscopy setup to obtain the sub-Doppler atomic spectrum of Rubidium, which is demodulated to obtain zero-crossing linear slopes at the exact points of each atomic transition and crossover transition. The frequency modulation for the spectroscopy setup, the signal analysis, as well as the automatic locking and re-locking of the laser is all implemented digitally using an Arduino open source microcontroller. The distributed feedback laser used for the design is fully characterized and the lock of the ’self-locking’ laser is analyzed in detail. The finished prototype has been used in a laser cooling experiment as the repump beam to investigate how it performs under real experimental conditions.|
|dc.publisher||University of Otago|
|dc.rights||All items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.|
|dc.subject||automatic laser locking|
|dc.subject||Modulation Transfer Spectroscopy|
|dc.subject||saturation absorption spectrocopy|
|dc.subject||Distributed feedback laser|
|dc.subject||distributed bragg reflection laser|
|dc.subject||Direct Digital Synthesis|
|dc.subject||serial peripheral interface|
|dc.subject||Automatic laser re-locking|
|dc.subject||laser locking duration and stability|
|dc.title||A Stand-Alone 'Self-Locking' Laser|
|thesis.degree.name||Master of Science|
|thesis.degree.grantor||University of Otago|
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