Frequency stabilization of a 1092-nm diode-pumped fiber laser and a 1033-nm external cavity diode laser for use in an optical atomic clock based on a strontium-88 single ion

An optical atomic clock based on a single trapped 88Sr+ ion is under development at the National Research Council of Canada. This thesis consists of the frequency stabilization of a diode-pumped fiber laser at 1092 nm and an external cavity diode laser at 1033 nm which are used for atomic state repumping and clearing of the metastable state after excitations by probe pulse, respectively. The lasers are frequency stabilized to an optical transfer cavity, which is in turn referenced to a polarization-stabilized HeNe laser. The 1092 nm source was demonstrated to remain frequency locked using this stabilization technique for 2.5 days with a standard deviation in frequency of 380 kHz over this period. The stabilized 1092 nm fiber laser has been used to extend the longest unattended trapping time for this setup to 15 hours and is no longer the likely point of failure for long term ion confinement.