The center frequency of a diode laser driven by a constant injection current can be stabilized by controlling the operating temperature. Since the voltage across the diode laser is a direct monitor of the operating temperature, the stabilized center frequency is insensitive to ambient temperature variations. In our experiment, we can control the operating temperature variation within ±0.005℃. This means that the central frequency of diode laser can be stabilized within from ±100MHz to ±150MHz depending on laser types used.
