Effect of the QW number to produce circular single-mode beam in 1060 nm laser diodes

The practical importance of 1064 nm single-mode beams in fiber lasers as a source has led to extensive research into increasing the power of these lasers. In this paper, by using an asymmetric structure in a 1064 nm laser, the internal loss of the laser is reduced. The increase in the number of quantum wells (QWs) in the active region was also investigated. The results show that in the case of high thickness waveguide, where the confinement factor is low, increasing the number of QWs will increase the power, but the power portion of the fundamental mode is decreased and higher order modes are excited. Therefore, using of the active region including single-quantum well (SQW) is the best case for circular single mode beam.