Laser Phase Offset Lock

Offset Lock to phase modulate a pair of External Cavity Diode Lasers (ECDLs) separated by 6.8 GHz for manipulating between the hyperfine ground levels in Rb87.

Project Plans

1. Assemble two ECDLs.

2. Frequency stabilise one of the ECDLs to the Rb87 ⁵S_1/2 → ⁵P_3/2.

3. Create a beat signal between the two lasers via heterodyning.

4. Phase modulate laser to obtain a 6.8 GHz beat signal and stabilise it at this fixed offset