Frequency stabilization of a single mode 780nm VCSEL lasers with the use of a rubidium cell

Techniques of frequency stabilization of the single mode 780 nm VCSEL laser with the use of an external ⁸⁵Rb rubidium cell are presented. There is presented a comparison of different active and passive stabilization methods. The best method, using Zeeman splitting phenomenon and an optical switch with SSFLC cell, allowed to achieve stability level of 3ldr10^-8 which responds to frequency variations of only 10 MHz. The stabilized VCSEL laser could be used as the source of radiation in an optical communication and in a laser interferometry. The same technique with different cells (for example cesium cell) could be used for stabilization of another wavelength of laser radiation used in optical networks.