The theoretical model considering nonlinear effects in the external cavity semiconductor laser with sampled fiber grating
has been presented. Such effects are including the asymmetric side mode suppression ratio (SMSR) or power
characteristics, and hysteresis phenomena. This theoretical model is based on the transmission line theory on compound
cavity. The parameters of the laser, e.g. active section length and phase section length, have been optimized to suppress
such nonlinear effects, which makes the device control simple and reliable, while the performances such as 16nm tuning
range, 40dB SMSR, 8.5mW output power can be maintained.
An analytical expression is proposed for evaluating the performances of reflection-spectrum envelope for
sampled gratings. The accuracy of the expression has been verified by the simulated reflectivity spectrum by
use of transfer matrix method. A new technique of multiple reflection-spectrum envelope concatenation is
introduced to demonstrate a 23-channel grating with uniform characteristics in all channels. The proposed
technology can densify sampled grating both in spectral channel number and in spatially physical
corrugation.
Widely tunable external cavity semiconductor lasers with sampled fiber gratings are investigated. Their static properties,
such as threshold gain, tuning characteristic, emitting light spectrum, and side mode suppression ratio, have been
simulated and discussed by a combined theoretical model, which is developed to match experimental results. Up to
thirteen tunable channels can be obtained in this laser with high side-mode suppression ratios by tuning the injection
current of the passive phase control section. With the decrease of AR-coating reflectivity, the narrow line-widths, wide
tuning range, and high threshold gain in those tunable external cavity semiconductor lasers have been presented.
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.