We report on the formation of novel turbulent coherent structures in a long cavity semiconductor laser near the lasing threshold. Experimentally, the laser emits a series of power dropouts within a roundtrip, and the number of dropouts per series depends on a set of parameters including the bias current. At fixed parameters, the drops remain dynamically stable, repeating over many roundtrips. By reconstructing the laser electric field in the case where the laser emits one dropout per roundtrip and simulating its dynamics using a time-delayed model, we discuss the reasons for long-term sustainability of these solutions. We suggest that the observed dropouts are closely related to the coherent structures of the cubic complex Ginzburg–Landau equation.
© 2020 Optical Society of AmericaFull Article | PDF Article
18 September 2020: A typographical correction was made to the author email address.
More Like This
In-Goo Lee, Chang-Hwan Yi, Ji-Won Lee, Jinhyeok Ryu, Sunjae Gwak, Kwang-Ryong Oh, and Chil-Min Kim
Opt. Lett. 45(13) 3809-3812 (2020)
Abhinandan Bhattacharjee and Anand K. Jha
Opt. Lett. 45(14) 4068-4071 (2020)
Graeme Harvie, Adam Butcher, and Jon Goldwin
Opt. Lett. 45(19) 5448-5451 (2020)