Title :
Effect of in-phase and antiphase gain coupling on high-speed properties of MQW DFB lasers
Author :
Hong, J. ; Makino, T. ; Lu, H. ; Li, G.P.
Author_Institution :
Adv. Technol. Lab., Bell-Northern Res., Ottawa, Ont., Canada
Abstract :
Effect of in-phase and antiphase gain-coupling on high-speed properties is studied for MQW DFB lasers with periodically truncated quantum-wells. The enhancement of modulation bandwidth due to antiphase gain-coupling is found significantly suppressed, and gain-coupled DFB lasers with high /spl kappa/L are preferred for large modulation bandwidth due to the presence of linear gain saturation in MQW lasers.<>
Keywords :
distributed feedback lasers; high-speed optical techniques; laser theory; optical couplers; optical modulation; optical saturation; quantum well lasers; semiconductor device models; MQW DFB lasers; antiphase gain coupling; gain-coupled DFB lasers; high-speed properties; in-phase gain coupling; linear gain saturation; modulation bandwidth; periodically truncated quantum-wells; Bandwidth; Charge carrier density; Gain; Gratings; High speed optical techniques; Laser modes; Nonlinear optics; Optical coupling; Optical saturation; Quantum well devices;
Journal_Title :
Photonics Technology Letters, IEEE
