Figure 1
From: Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Schematic representation of the experimental setup for laser locking using saturated absorption spectroscopy (SAS). Here, BS—90:10 beam splitter, W1, and W2—quarter-wave plates, PBS1 and PBS2—polarizing beam splitters, VC—Rb vapour cell, M1, M2, M3 and M4—mirrors, M5—cylindrical mirror, PD—photodiode, MS—multichannel switch, C—fibre coupler, F—Fizeau interferometer, CCD—charged coupled devices.