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Microring Resonators
Published in Erich Kasper, Jinzhong Yu, Silicon-Based Photonics, 2020
In optical interconnect and optical computing, the optical buffer plays an important role since it is able to delay optical pulses and avoid signal blocking. Microring resonators serve as time delay lines and optical buffers. When the microring is resonating, the signal light will be captured and stay in the resonator for a moment. Time delay lines based on microring resonators have such configurations as all-pass filter (APF), coupled-resonator optical waveguide (CROW), and parallel-coupled double microrings with analogue to electromagnetically induced transparency (EIT) effect [19, 36], as shown in Fig. 4.34.
MRR systems and soliton propagating in optical fiber communication
Published in Iraj Sadegh Amiri, Abdolkarim Afroozeh, Harith Ahmad, Integrated Micro-Ring Photonics, 2016
Iraj Sadegh Amiri, Abdolkarim Afroozeh, Harith Ahmad
An optical buffer is a device that is capable of temporarily storing light in telecommunication. Just as in the case of a regular buffer, it is a storage medium that enables compensation for a difference in time of occurrence of events. More specifically, an optical buffer serves to store data that is transmitted optically in the form of light without converting it into the electrical domain.
High buffering capability of silicon-polymer photonic-crystal coupled cavity waveguide
Published in Waves in Random and Complex Media, 2023
Israa Abood, Sayed Elshahat, Zhengbiao Ouyang
Optical buffers can temporarily store and adjust the timing of optical packets [1]. They are key components for optical computers, processors, and all-optical communication networks in the future. With a unique photonic nanostructure and slow light properties, the optical buffer based on the photonic crystal (PC) has a senior feature [2]. The photonic-crystal coupled-cavity waveguide (PC-CCW) has a catchy feature for slow light with a large flat-band and small group velocity [3–5], which may hold the key to optical buffering and optical delay lines. For optical buffers, the physical size of each stored bit determines the integration scale of buffers. In slow-light optical buffers, the minimum size of 1 bit is approximately equal to the wavelength of light in the buffer [6]. Promoting the integration scale or the integration density of optical buffers is an attractive subject. So, this paper aims to obtain high buffering density or capability by considering silicon-polymer PC-CCW (SP-PC-CCW). The polymer material is used because it has a stronger electro-optic effect with a high electro-optic coefficient of 10 pm/V to 170 pm/V [7] so that the electro-optic effect can be incorporated in future buffers to realize dynamic modulation tuning and controlling of optical properties. Especially, the electro-optic effect can be greatly enhanced by the compression of the local density of modes [8] in cavities and thus also in the PC-CCW.