Adalberto Sapia

  • Citations Per Year
Learn More
The nonlinearity difference in the two passbands of a distributed-feedback semiconductor laser amplifier was studied experimentally. A theoretical explanation was given by using the transmission matrix approach. The difference of nonlinearity in the two passbands was found to be enhanced greatly by the mechanism of asymmetric facet reflection.
The anomalous enhancement of fluctuations during gain switching of semiconductor lasers is considered. An extension of the quasi-deterministic theory is performed to account for the nonlinear dynamics of the process. The results are in quantitative agreement with those of a computer simulation of the Langevin rate equations describing the process.
We present experimental results showing a departure from the usually assumed Gaussian statistics of the fluctuations of the instantaneous emission frequency in single-mode semiconductor lasers operating under the influence of an external optical feedback. The amount of this departure is studied and analyzed under various operating conditions.
We demonstrate absolute frequency stabilization of a widely tunable Tm:Ho:YAG laser by locking the oscillator to the P(12) absorption line of the H(79)Br molecule at 2097.222 nm, using the fringe side-locking technique. We perform time and spectral analysis of open- and closed-loop error signals to evaluate the frequency noise. In closed-loop operation a(More)
  • 1