Analysis of the linewidth of a grating-feedback GaAlAs laser

G. Genty, A. Grohn, H. Talvitie, M. Kaivola, H. Ludvigsen
2000 IEEE Journal of Quantum Electronics  
Effects of external optical feedback from a reflection grating on the linewidth of a GaAlAs semiconductor laser operating at 780 nm are investigated. Accurate linewidth measurements as a function of the laser frequency tuning have been performed by applying the self-homodyne technique with a short delay line. A realistic coupled-cavity model, which incorporates the frequency-dependent reflection from the grating, is used to explain the measured data. The agreement between the theoretical and
more » ... erimental results was found to be good. Index Terms-External cavity laser, linewidth, self-homodyne method.
doi:10.1109/3.880660 fatcat:st73gopez5abpgct4x3biovwjm