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Optical Pulse Amplification
Published in Mário F. S. Ferreira, Optical Signal Processing in Highly Nonlinear Fibers, 2020
FBAs can be used also to realize slow light. Some important applications for slow light have been proposed, including optical buffering, data synchronization, optical memories, and signal processing [74,95–99]. Compared with other approaches, fiber-based SBS slow light offers several advantages: the use of an optical fiber provides long interaction lengths, the involved resonance can be created at any wavelength by changing the pump wavelength, and the process can be achieved at room temperature [98–100]. The use of fibers made of highly nonlinear glasses is a good option to enhance the slow-light generation. The use of a 2-m bismuth-oxide HNLF was reported to generate 29-dB Brillouin gain and the resultant optical delay of 46 ns with 410-mW pump power [101]. In another experiment, a Brillouin gain of 43 dB was achieved with only 60-mW pump power in a 5-m-long As2O3 chalcogenide fiber, which leads to an optical time delay of 37 ns [102].
Soliton signals propagating in fiber waveguides and slow light generation
Published in Iraj Sadegh Amiri, Abdolkarim Afroozeh, Harith Ahmad, Integrated Micro-Ring Photonics, 2016
Iraj Sadegh Amiri, Abdolkarim Afroozeh, Harith Ahmad
Many scientists have taken keen interest to measure speed of light with high accuracy and precision (Gauthier & Boyd, 2007). Controlling the speed of light is important for many applications (Mork, 2008). Slow light refers to the control of the light velocity in a particular medium. The term slow light refers to the propagation of an optical signal through a medium with a speed considerably less than the speed of light in vacuum. The nature of light matter interactions is also important in order to understand light propagation in a particular medium, as it is dependent on the nature of the medium material (Born & Wolf, 1999).
Physical sensors based on photonic crystals
Published in Guangya Zhou, Chengkuo Lee, Optical MEMS, Nanophotonics, and Their Applications, 2017
Slow light means that the light travels with a very low group velocity in a waveguide. Hence, the optical field is accumulated in the guided media and the light interaction is highly enhanced. In general, the PhC waveguide can support the slow light because of the standing wave pattern generated by the PhC lattice. Hence, by leveraging the shape change of the PhC lattice design, the slow light structure can provide potential for sensing the stress and strain presented in the PhC slab.
Tunable plasmon-induced transparency based on graphene nanoring coupling with graphene nanostrips
Published in Journal of Modern Optics, 2018
Chang-Long Liao, Guang-Lai Fu, Sheng-Xuan Xia, Hong-Ju Li, Xiang Zhai, Ling-Ling Wang
This tunability can find applications in slow-light devices (33). Slow light is important for routing optical information. The controllable slow-light metamaterial can trap photons for a long time inside the structure, which is useful to enhance light-matter interactions. Figure 5(b) shows the dispersion of transmission phase of PIT system with different EF. The group delay (τg) of incident light will be then estimated by the following formula.