Achievements of the Quantum Noise Limited Frequency Stability in AlGaAs Semiconductor Laser

Abstract
The frequency of an AlGaAs semiconductor laser has been locked to a stable Fabry-Perot interferometer by controlling the injection current. In the integration time range of τ\gtrsim10-4, the resulting frequency stability was in good agreement with the theoretical stability which was estimated taking into account the quantum phase fluctuations of the laser.