Self-pulsation in an InGaN laser-theory and experiment

Abstract

Abstract-Room-temparature operation of self-pulsating InGaN lasers was obtained at a wavelength of 395 nm. The laser structure consists of a multiquantum-well InGaN active layer and a p-type InGaN single-quantum-well saturable absorber. The frequency range of the self-pulsation was from 1.6 to 2.9 GHz. The experimental results were well explained with our theoretical analysis. We found that features of the saturable absorber strongly affect the self-pulsation. Influence of device and material parameters on the laser dynamics was also investigated.Index Terms-Room temperature, saturable absorber, self-pulsation, violet InGaN laser.

Self-pulsing laser as oscillator Toda: approximations through elementary functions

“…Various effects may affect the system: the re-absorption at the signal wavelength [19,16], the modal structure of the signal [23,24], non-uniform distribution of pump and signal, the thermal lensing and the spatial hole burning [34,35]. A laser, which follows the scenario for the oscillator Toda, is still left to be achieved.…”

Investigation of red‐emitting distributed Bragg reflector lasers by means of numerical simulations

“…Thus, DBR lasers consist always of at least two sections -an active section and a passive section. If the active layer in a DBR laser extends over the whole cavity, the DBR section can act like a saturable absorber which is known to cause a dynamic unstable behaviour [2][3][4].…”

“…Inset: calculated lasing wavelength versus current. The current has been multiplied by a factor of 1.4 to account for lateral current spreading and carrier diffusion Gain g (left) and linewidth enhancement factor α H (9) (right) versus carrier density N at T = 300 K. Black solid: models(3) and(4). Red dotted: microscopic simulation at a fixed wavelength near the gain peak.…”

Gallium Nitride-based Semiconductor Optical Amplifiers

“…Earlier studies concentrated on self-pulsation for applications in optical storage systems since this approach can reduce the optical feedback noise [1--14]. Several pulse generation techniques exist, including gain-switching [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], self-pulsating [18][19][20], mode-locking [7,17,21], and superradiance [22]. Kono et al demonstrated the first gain-switching (GS) operation of a GaN-based LD, producing a peak power of 12 W and 10 W with a pulse duration of 10 ps at 405 nm [15,17].…”