  An essential metric to quantify the stability of a laser is its frequency
noise (FN). This metric yields information on the linewidth and on noise
components which limit its usage for high precision purposes such as coherent
communication. Its experimental determination relies on challenging optical
phase measurements, for which dedicated commercial instruments have been
developed. In contrast, this work presents a simple and cost-effective method
for extracting FN features employing a delayed self-heterodyne (DSH) setup.
Using delay lengths much shorter than the coherence length of the laser, the
DSH trace reveals a correspondence with the FN power spectral density (PSD)
measured with commercial instruments. Results are found for multiple lasers,
with discrepancies in intense dither tone frequencies below 0.2 percent
