Abstract:
A theoretical and experimental study of a graded-index separate confinement heterostructure (GRIN-SCH) distributed feedback (DFB) multiquantum-well (MQW) diode laser emit...Show MoreMetadata
Abstract:
A theoretical and experimental study of a graded-index separate confinement heterostructure (GRIN-SCH) distributed feedback (DFB) multiquantum-well (MQW) diode laser emitting at 1.55 /spl mu/m subject to external light injection from several lasers is presented. Lang's model for the classical single master-slave configuration is extended to include light injection from several master lasers. Free carrier transport effects are taken into account. An experimental validation of the model for two master lasers is made by means of a quantitative comparison between measured and calculated optical spectra. A fiber optics experimental setup makes it possible to measure precisely the power which is injected into the slave laser from each master laser. Measurements and model are in good quantitative agreement.
Published in: Journal of Lightwave Technology ( Volume: 17, Issue: 4, April 1999)
DOI: 10.1109/50.754793
Citations are not available for this document.
Cites in Patents (1)Patent Links Provided by 1790 Analytics
1.
NOLTING, Hans-Peter; GRAVERT, Martin, "TUNABLE TANDEM LASER CONSISTING OF SELF-PULSATING TWO SECTION DFB LASER FOR GENERATING AN OPTICAL CLOCK FREQUENCY"
Inventors:
NOLTING, Hans-Peter; GRAVERT, Martin
Abstract:
Known two section lasers for generating optical clock frequency have two tuning sections for fine tuning the phase and for attenuation/intensification. However, not all two section lasers produced can be adjusted and used due to a relatively high fluctuation span in resulting parameters such as extinction and jitter. In the tandem laser (TL) according to the invention, both DFB lasers are high-pumped DFB lasers (DFB1, DFB2) having different wavelengths (l1, l2) with a complex coupling (Kcomplex) for unmistakable, stable mode pair coupling by means of grids that influence both the phase speed by modifying the refractive index and the intensification profile in each DFB laser (DFB1, DFB2). Offset (OS) as difference in wavelengths (l1, l2) is preselected in a broad range for roughly selecting the clock pulse frequency (fT roughly). Very high, stable working ranges are reached through fine tuning (fT fine) by means of controllable tuning sections (TS), wherein the selections available in produced lasers are no longer needed. The tandem laser according to the invention can be used as stable clock pulse regenerator, especially for optical deciders in 3R-regenerators in optical networks with up to ultrahigh bit rates. Space and cost-saving cascaded parallel connections are possible.
Assignee:
FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG,
INDIVIDUAL PATENTER,
Filing Date:
04 April 2002
Grant Date:
24 October 2002
Patent Classes:
Current International Class:
H01S0050625000
