Tunable Diode Lasers Laser Locking Electronics

The Pound-Drever-Hall detector PDD 110/F serves to lock a diode laser to a maximum absorption or transmission of a reference medium (e.g. an optical resonator). The PDD 110/F features an internal HF modulation source for modulating the diode laser frequency. The signal from the reference is detected and demodulated phase sensitively to produce a high bandwidth dispersive error signal that can be used to lock the laser using a PID controller.