Results 251 to 260 of about 1,589,013 (282)
Some of the next articles are maybe not open access.
Distributed Feedback Semiconductor Lasers
Integrated Optics, 1976Recently semiconductor lasers with distributed feedback have been successfully operated under dc bias and are becoming more and more practical. Because of their integration capability as well as frequency and mode selectivity, they are expected to find wide application as light sources in various optical systems.
M. Nakamura, A. Yariv
openaire +1 more source
Distributed feedback systems for muscle control
Brain Research, 1974Abstract Responses of single neurones in motor cortex to passive stretches of the contralateral extensor digitorum communis muscle were studied in regionally anaesthetized, paralyzed cats. Parameters of stimulation could be adjusted to activate either only group Ia afferents, or a combination of group Ia, group II and group Ib afferents from muscle ...
J T, Murphy, Y C, Wong, H C, Kwan
openaire +2 more sources
Distributed Delays Stabilize Ecological Feedback Systems
Physical Review Letters, 2005We consider the effect of distributed delays in predator-prey models and ecological food webs. Whereas the occurrence of delays in population dynamics is usually regarded a destabilizing factor leading to the extinction of species, we here demonstrate complementarily that delay distributions yield larger stability regimes than single delays.
Christian W, Eurich +2 more
openaire +2 more sources
Nonlinear distributed feedback gratings
Annual Meeting Optical Society of America, 1987Nonlinear distributed feedback gratings (DFBGs) hold considerable promise for application as fast all-optical data processing elements.1 The fabrication of practical nonlinear DFBG devices requires a careful study of the fabrication parameters which influence the performance.
K. Rochford +4 more
openaire +1 more source
Distributed feedback laser for biosensing applications
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014We present an organic semiconductor distributed feedback laser biosensor and demonstrate its sensing capabilities. Optimization of the gain layer thickness to maximize the response to refractive index changes and bulk sensing results are shown. Desthiobiotin-avidin sensing assay results are also presented and the potential to perform multiple, repeated
A-M, Haughey +4 more
openaire +2 more sources
Distributed Feedback GaAs Homojunction Injection Laser
Applied Optics, 1974Abstract : The authors reported the first observation of distributed feedback lasing in a pulsed homojunction GaAs injection laser. Feedback was achieved via a third order grating structure which was ion machined in the top surface of the p-type layer.
H M, Stoll, D H, Seib
openaire +2 more sources
Distributed-Feedback Semiconductor Lasers
1986We have seen in Chapter 6 that a conventional semiconductor laser does not emit light in a single longitudinal mode. In general, the mode closest to the gain peak is most intense, and a few percent of the output power is carried by other longitudinal modes lying close to the gain peak.
Govind P. Agrawal, Niloy K. Dutta
openaire +1 more source
STATE FEEDBACK FOR DISTRIBUTED CONTROL SYSTEMS
IFAC Proceedings Volumes, 1982Abstract This paper describes a new approach in using an industrial distributed control system. A monovariable or multivariable plant is controlled through a state feedback algorithm without any modification of the original DCS, and operators can keep their conventional way of running the equipment : display of reference values and valve positions ...
J.P. Mérisse, J.A. Videau
openaire +1 more source
Gain saturation in distributed feedback lasers
Applied Optics, 1975An approximate method is presented for the analysis of overcoupled distributed feedback lasers. A closed form expression is obtained for the power emitted by a laser normalized to the saturation power in terms of the loss coefficient alpha(L), small signal gain coefficient alpha(0), coupling parameter kappa, and length of the laser L.
openaire +2 more sources