A Novel MicroPhotonic Structure for Optical Header Recognition

In this paper, we propose and demonstrate a new MicroPhotonic structure for optical packet header recognition based on the integration of an optical cavity, optical components and a photoreceiver array. The structure is inherently immune to optical interference thereby routing an optical header within optical cavities to different photo receiver elements to generate the autocorrelation function, and hence the recognition of the header using simple microelectronic circuits. The proof-of-concept of the proposed MicroPhotonic optical header recognition structure is analysed and experimentally demonstrated, and results show excellent agreement between measurements and theory

Photonic RF signal processors

The purpose of this thesis is to explore the emerging possibilities of processing radiofrequency (RF) or microwave signals in optical domain, which will be a key technology to implement next-generation mobile communication systems and future optical networks. Research activities include design and modelling of novel photonic architectures for processing and filtering of RF, microwave and millimeter wave signals of the above mentioned applications. Investigations especially focus on two basic functions and critical requirements in advanced RF systems, namely: • Interference mitigation and high Q tunable filters. • Arbitrary filter transfer function generation. The thesis begins with a review on several state-of-the-art architectures of in-fiber RF signal processing and related key optical technologies. The unique capabilities offered by in-fiber RF signal processors for processing ultra wide-band, high-frequency signals directly in optical domain make them attractive options for applications in optical networks and wide-band microwave signal processing. However, the principal drawbacks which have been demonstrated so far in the in-fiber RF signal processors arc their inflexible or expensive schemes to set tap weights and time delay. Laser coherence effects also limit sampling frequency and introduce additional phase-induced intensity noise

MULTIFUNCTIONAL OPTICAL DEVICES BASED ON 5x5 MULTIMODE INTERFERENCE ON AN SOI PLATFORM FOR ALL-OPTICAL COMPUTING APPLICATIONS

The design of multifunctional devices based on Multimode  Interference  (MMI) structures for all-optical computing applications is presented in this paper. Based on the self-imaging effect in a multimode silicon planar waveguide, a variety of all-optical devices such as all-optical beam splitters, combiners, optical XOR and OR logic gates can be realized. The analytical expression describing  the  characteristics  of  the  proposed  devices  is  analysed  and derived. Designs  of  the proposed devices on a silicon on insulator (SOI) platform are then verified and optimised using numerical simulation method

Journal of Telecommunications and Information Technology, 2013, nr 2

kwartalni

A novel microphotonic structure for optical header recognition

In this paper, we propose and demonstrate a new MicroPhotonic structure for optical packet header recognition based on the integration of an optical cavity, optical components and a photoreceiver array. The structure is inherently immune to optical interference thereby routing an optical header within optical cavities to different photo receiver elements to generate the autocorrelation function, and hence the recognition of the header using simple microelectronic circuits. The proof-of-concept of the proposed MicroPhotonic optical header recognition structure is analysed and experimentally demonstrated, and results show excellent agreement between measurements and theory