Frequency stabilization of multiple continuous-wave lasers via a precision wavelength meter

We experimentally demonstrate an effective method for achieving long-term frequency stabilization of multiple lasers. This method is based on the use of a high precision wavelength meter and a fiber switch. The frequency instabilities induced by the wavelength meter and the fiber switch are evaluated and suppressed by means of calibration of the wavelength meter with an ultra-stable laser. Utilizing this approach, the long-term frequency instabilities of four lasers operating at 397 nm, 626 nm, 866 nm and 988 nm respectively, are all reduced to the order of 10 −9 . This system not only meets the 10 −9 frequency instability requirement but also enables continuous operation for several hours. Moreover, it demonstrates a remarkable degree of insensitivity to the time intervals of frequency calibration, demonstrating its robustness and reliability in practical applications.