The aim of the project is to stabilize the Toptica DLC pro laser (780nm) by locking at F=2→F’=2, 3 crossover of 87Rb via Zeeman driving. A saturation absorption spectroscopy setup is designed to obtain the hyperfine levels of Rubidium with Doppler background subtraction. A resonant LC circuit of frequency 511 kHz is used for the Zeeman modulation of the atomic levels. The error signal obtained using a lock in amplifier setup is used for locking the laser at the required frequency. This will thereafter be used for cold atom experiments.