Results 261 to 270 of about 30,451 (313)
Some of the next articles are maybe not open access.
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
Laser dynamics in organic distributed feedback lasers
Applied Physics Letters, 2006The authors study laser dynamics in a polymer distributed feedback resonator by performing pump-probe experiments. They measured the population kinetics in the device under lasing operation with subpicosecond time resolution. By modeling the system with a set of coupled rate equations, which account for stimulated emission and nonradiative decays, they
ZAVELANI ROSSI, MARGHERITA +4 more
openaire +4 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
Photodimer Distributed Feedback Laser
Applied Physics Letters, 1972A tunable (0.567–0.605 μ) solid-state dye laser with a small active volume (10 μ×80 μ×1 cm), which uses a nondestructively read-reversible optical-memory material to control the intensity and wavelength of the laser emission, is described. The optical-memory material, photodimers of acridizinium ethylhexanesulfonate, provides distributed feedback in ...
R. L. Fork +2 more
openaire +1 more source
Distributed feedback transistor laser
Applied Physics Letters, 2010Single longitudinal mode operation of an InGaP/GaAs/InGaAs quantum well heterojunction bipolar transistor laser is reported. A third order distributed feedback surface grating is fabricated in the top emitter AlGaAs confining layers using soft photocurable nanoimprint lithography.
F. Dixon, M. Feng, N. Holonyak
openaire +1 more source
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
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
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
1982
All of the lasers that have been described so far depend on optical feedback from a pair of reflecting surfaces, which form a Fabry-Perot etalon. In an optical integrated circuit, in which the laser diodes are monolithically integrated within the semiconductor wafer, it is usually very difficult to form such reflecting surfaces.
openaire +1 more source
All of the lasers that have been described so far depend on optical feedback from a pair of reflecting surfaces, which form a Fabry-Perot etalon. In an optical integrated circuit, in which the laser diodes are monolithically integrated within the semiconductor wafer, it is usually very difficult to form such reflecting surfaces.
openaire +1 more source
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