Title :
Optical feedback in vertical-cavity surface-emitting lasers
Author :
Hsu, A. ; Seurin, J.-F.P. ; Chuang, S.L. ; Choquette, K.D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
fDate :
12/1/2001 12:00:00 AM
Abstract :
Optical feedback in a vertical-cavity surface-emitting laser due to a fiber facet of varying position is studied in experiment and theory. Measured spectra and light-current curves show periodic variations in resonant wavelength, threshold current, differential quantum efficiency, and output power as a function of fiber position. Theoretical results were obtained using a 2 × 2 vector propagation matrix method which models the laser and fiber in a single structure and shows good agreement with experimental results. A novel method for determining the linewidth enhancement factor α by analyzing the wavelength variation as a function of fiber position is presented and a value of α = 2.8 was obtained
Keywords :
laser feedback; laser theory; matrix algebra; semiconductor device models; semiconductor lasers; spectral line breadth; surface emitting lasers; vectors; VCSEL; differential quantum efficiency; fiber facet; fiber position; light-current curves; linewidth enhancement factor; optical feedback; output power; propagation matrix method; resonant wavelength; single structure; threshold current; vertical-cavity surface-emitting laser; vertical-cavity surface-emitting lasers; wavelength variation; Current measurement; Fiber lasers; Laser feedback; Laser theory; Optical feedback; Optical fiber theory; Optical surface waves; Power measurement; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
