Title :
Nonlinear gain effects on spectral dynamics in quantum well lasers
Author :
Takahashi, T. ; Arakawa, Y.
Author_Institution :
Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan
Abstract :
A theoretical analysis is presented to show how nonlinear gain affects the spectral dynamics of quantum well (QW) lasers. The results indicate that the nonlinear gain, which is enhanced by the quantum confinement of carriers, causes an increase in the linewidth enhancement factor alpha . This enhancement of alpha results in spectral rebroadening: under high power output conditions. These properties should be taken into account when quantum well lasers are designed for highly coherent lasers.<>
Keywords :
laser theory; light coherence; nonlinear optics; semiconductor junction lasers; spectral line breadth; carrier quantum confinement; diode laser designs; high power output conditions; highly coherent lasers; linewidth enhancement factor; nonlinear gain; quantum well lasers; semiconductor; spectral dynamics; spectral rebroadening; Carrier confinement; Charge carrier density; Gain; Laser theory; Laser transitions; Nonlinear equations; Potential well; Quantum mechanics; Quantum well lasers; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
