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Distributed feedback grating

Figure 7. A number of all-optical guided wave devices and their responses to increasing power. (a) Half beat length directional coupler. (b) One beat length directional coupler. (c) Distributed feedback grating relector. (d) Nonlinear Mach-Zehnder interferometer. (e) Nonlinear mode mixer. (f) Nonlinear X-switch. For nonlinear media (n2 0), the input power determines the output state. Figure 7. A number of all-optical guided wave devices and their responses to increasing power. (a) Half beat length directional coupler. (b) One beat length directional coupler. (c) Distributed feedback grating relector. (d) Nonlinear Mach-Zehnder interferometer. (e) Nonlinear mode mixer. (f) Nonlinear X-switch. For nonlinear media (n2 0), the input power determines the output state.
Fig. 12. Cut-out drawing of a distributed feedback (DFB) laser showing the active region and a diffraction grating, under the active layer, which produces... Fig. 12. Cut-out drawing of a distributed feedback (DFB) laser showing the active region and a diffraction grating, under the active layer, which produces...
Fig. 11. Schematic of edge-emitting laser diodes where the arrows represent the direction of laser emission and U represents the active region (a) standard stmcture with cleaved facets for mirrors and (b) distributed feedback (DFB) laser that employs coherent reflection from a grating to generate optical... Fig. 11. Schematic of edge-emitting laser diodes where the arrows represent the direction of laser emission and U represents the active region (a) standard stmcture with cleaved facets for mirrors and (b) distributed feedback (DFB) laser that employs coherent reflection from a grating to generate optical...
The sensitivity enhancement due to lasing action is a general principle that is independent of sensor architecture. Chemical sensitivity enhancements have been observed when the polymer is fabricated into a simple planar waveguide (Fig. 5.11a), deposited over a distributed feedback (DFB) grating (Fig. 5.11b) and coated on the exterior of an optical fiber (Fig. 5.11c). [Pg.166]

Ye C, Wong KY, He Y, Wang X. 2007. Distributed feedback sol gel zirconia waveguide lasers based on surface relief gratings. Optic Expr 15 936 944. [Pg.93]

Song WZ, Vasdekis AE, Li ZY, Psaltis D (2009) Optofluidic evanescent dye laser based on a distributed feedback circular grating. Appl Phys Lett 94 161110... [Pg.2559]

Although many diode lasers work as multimode lasers, the distributed feedback (DFB) and distributed Bragg reflector (DBR) lasers show a mode selection because of their periodic structure. The mode selectivity is generated by the optical properties of the periodic stmctures because (Mily the modes that are associated with a standing wave/stop band are amplified. DFB structures are photonic structures, which are doped throughout the volume with chromophores (in an optimal case at the maxima of the standing waves), whereas DBR lasers have a miniature Fabry-Perot cavity in which the dye is localized, and the mirrors are replaced by periodic gratings [85]. [Pg.87]

DFB (distributed feedback) laser Laser diode in which light feedback for oscillation is realized by diffraction grating. [Pg.259]

Special laser chip structures can be designed in which a kind of diffraction grating is incorporated into the laser structure itself. These lasers are called distributed-feedback (DFB) lasers. DFB laser diodes... [Pg.66]

Fig.ll.27a,b. Distributed Feedback Dye Laser (DFDL) (a) Generation of a population grating by spatially modulated saturation, (b) Generation of short pulses with a traveling-wave DFDL [11.79]... [Pg.621]

Huang, W., Deng, S., Li, W., Peng, Z., Liu, Y., Hu, L., Xuan, L. A polarization-independent and low seattering transmission grating for a distributed feedback cavity based on holographie polymer dispersed liquid crystal. J. Opt. 13, 085501 (2011)... [Pg.401]

Tong, H.-P., Li, Y.-R., Lee, C.-R. All-optically controllable distributed feedback laser in a dye-doped holographic pol5nnerdispersed liquid crystal grating with a photoisomerizable dye. Opt Express 18, 2613-2620 (2010)... [Pg.405]

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