Laser frequency stabilization using embedded control for atom trapping experiments

Laser frequency stabilization is a fundamental requirement for applications including precision spectroscopy, quantum computing, quantum sensing, and metrology. However, existing commercial laser frequency stabilization systems remain bulky and require complex implementation. We present the design, development, and experimental validation of a compact and cost-effective laser frequency stabilization system with an integrated graphical user interface (GUI) based on embedded digital control. Experimental validation of the system is demonstrated by realizing a stable cesium magneto-optical trap (MOT) containing  (1.5 ± 0.2) ×10⁶ atoms. The stabilized laser performance is characterized by linewidth measurements using delayed self-heterodyne interferometry, yielding a linewidth of less than 100 kHz. The laser frequency lock is further characterized by performing long-term stability tests and overlapping Allan deviation analysis, quantifying both long-term drift and short-term noise. The resulting frequency fluctuations remain well below the natural linewidth of the cooling transition. The frequency noise spectral density measurement further indicates improved noise performance when compared to an FPGA-based system. A custom GUI provides real-time visualization of error signal, scan, and lock status, enabling efficient diagnostics and reproducible operation. This work enables the use of a compact laser frequency stabilization system for portable quantum experiments.