Tunable diode pumped Rb laser with single longitudinal and transverse mode operation

In this paper, a tunable single frequency Rb laser with TEM00 mode is realized. The linewidth is less than 1 GHz, with tuning range of 5 GHz, and central wavelength drift of less than 95 MHz (0.2 pm). The laser power is 1.4 W, with power fluctuation of less than 2%. Such kinds of tunable DPALs could be potential in applications for laser spectroscopy and quantum optics etc.