We have performed an analysis of harmonic contents of the optical output power for a diode laser and described the
results in details. In the first step the absolute value of power for each harmonic is obtained in terms of various diode
laser parameters, and the variations of external parameters such as modulation current, bias current and frequency are
discussed. The analysis is done by direct solution of rate equations of an arbitrary diode laser for carrier and photon
densities. We conclude that the maximum power occurs at isolated peaks and their loci have been investigated and
shown to be predictable by theory. It is known that the optical power has a nonlinear dependence on frequency, and the
maximum optical power of each harmonic attained in its resonance frequency. The resonant frequency is shown to be
tunable by bias current; thus in the next step we obtain the transfer function for different harmonic contents and have
achieved exact expression for each, allowing better optimization to gain improved results. We extend the approach to
higher harmonics and numerically calculate the THD (Total Harmonic Distortion) versus related parameters such as
frequency, bias current and modulation current. Furthermore we found an effective approach to reduce SHD (Second
Harmonic Distortion). The sequence for every arbitrary laser structure is also possible to be developed by the approach
presented in this work.
We have performed a numerical solution for band structure of an Abrikosov vortex lattice in type-II superconductors
forming a periodic array in two dimensions for applications of incorporating the photonic crystals concept into
superconducting materials with possibilities for optical electronics. The implemented numerical method is based on the
extensive numerical solution of the Ginzburg-Landau equation for calculating the parameters of the two-fluid model and
obtaining the band structure from the permittivity, which depends on the above parameters and the frequency. This is
while the characteristics of such crystals highly vary with an externally applied static normal magnetic field, leading to
nonlinear behavior of the band structure, which also has nonlinear dependence on the temperature. The similar analysis
for every arbitrary lattice structure is also possible to be developed by this approach as presented in this work. We also
present some examples and discuss the results.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.