Results 211 to 220 of about 27,744 (263)
Some of the next articles are maybe not open access.
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
Anne-Marie Haughey +4 more
openaire +2 more sources
Multiply resonant distributed-feedback lasers
IEEE Journal of Quantum Electronics, 1976In this paper, we propose, analyze, and experimentally demonstrate a new type of distributed feedback laser, the multiply-resonant distributed feed-back (MRDFB) laser. For active media having broad, partially- or fully-inhomogeneous gain lines, the MRDFB laser allows colinear lasing to occur simultaneously at several preselected wavelengths.
H. M. Stoll, D. H. Seib
openaire +1 more source
2013
Good quality long distance optical transmission over fiber needs lasers which emit at a single wavelength. This is almost universally realized by putting a wavelength-dependent reflector into the laser cavity, in a distributed feedback laser. In this chapter, the physics, properties, fabrication, and yields of distributed feedback lasers are described.
openaire +1 more source
Good quality long distance optical transmission over fiber needs lasers which emit at a single wavelength. This is almost universally realized by putting a wavelength-dependent reflector into the laser cavity, in a distributed feedback laser. In this chapter, the physics, properties, fabrication, and yields of distributed feedback lasers are described.
openaire +1 more source
Raman fiber distributed feedback lasers
Optics Letters, 2011We demonstrate fiber distributed feedback (DFB) lasers using Raman gain in two germanosilicate fibers. Our DFB cavities were 124 mm uniform fiber Bragg gratings with a π phase shift offset from the grating center. Our pump was at 1480 nm and the DFB lasers operated on a single longitudinal mode near 1584 nm.
Paul S, Westbrook +4 more
openaire +2 more sources
Picosecond distributed feedback dye lasers
IEEE Journal of Quantum Electronics, 1986The distributed feedback dye laser is a source of single picosecond pulses tunable in a very wide wavelength range. Operational principles, experimental arrangements, and recent applications are reviewed in this paper.
Bor, Z., Müller, A.
openaire +2 more sources
Distributed Feedback Imprinted Electrospun Fiber Lasers
Advanced Materials, 2014Imprinted, distributed feedback lasers are demonstrated on individual, active electrospun polymer nanofibers. In addition to advantages related to miniaturization, optical confinement and grating nanopatterning lead to a significant threshold reduction compared to conventional thin-film lasers.
Persano L +7 more
openaire +5 more sources
Semiconductor laser with a distributed feedback
Soviet Journal of Quantum Electronics, 1975Stimulated emission was obtained from an optically pumped gallium arsenide laser with a distributed feedback. The feedback was produced by a diffraction grating formed on the surface of a p –type GaAs layer prepared by the diffusion of zinc into an n –type substrate.
V N Luk'yanov +2 more
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
Modelling of Distributed Feedback Lasers
1993This chapter describes how laser diodes for optical communication, with their complex structure and physical interactions can be simulated. These lasers are usually of such a nature that variations in the lateral and transverse direction, as well as the electronic transport problem can be treated in a most simplified way, while longitudinal and ...
Geert J. I. Morthier, Roel G. Baets
openaire +1 more source
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