Title :
Application of the spectral index method to laser diode design
Author :
Martin, Paul S. ; Chen, Jerry C. ; Fonstad, Clifton G. ; Haus, Hermann A.
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
fDate :
4/1/1995 12:00:00 AM
Abstract :
The spectral index method (SIM) is compared to the effective index method (EIM) and the beam propagation method (BPM) for the calculation of the optical mode index and mode profile in a prototypical distributed feedback (DFB) rib waveguide laser diode. Modal index is shown to be insufficient as a metric of comparison, so in addition to nmode , the quantum well filling factor Γ and grating coupling coefficient κ are included in the metric for comparison. SIM is found to yield superior results to EIM and to give results comparable to BPM almost two orders of magnitude faster
Keywords :
diffraction gratings; distributed feedback lasers; laser theory; optical couplers; optical design techniques; optical waveguide theory; quantum well lasers; refractive index; rib waveguides; waveguide lasers; DFB rib waveguide laser diode; beam propagation method; effective index method; grating coupling coefficient; laser diode design; mode profile; optical mode index; prototypical distributed feedback rib waveguide laser diode; quantum well filling factor; spectral index method; Diode lasers; Distributed feedback devices; Filling; Gratings; Laser beams; Optical design; Optical feedback; Optical propagation; Optical waveguides; Prototypes;
Journal_Title :
Lightwave Technology, Journal of
