Fine Resolution Spectral Filtering Using a 25GHz Free-Spectral Range Arrayed Waveguide Grating

2015 ◽  
Author(s):  
Noam Goldstein ◽  
Leonid Pascar ◽  
David Sinefeld ◽  
Ori Golani ◽  
Dan M. Marom
Keyword(s):  
Spectral Range ◽  
Free Spectral Range ◽  
Arrayed Waveguide Grating ◽  
Spectral Filtering ◽  
Waveguide Grating ◽  
Fine Resolution ◽  
Arrayed Waveguide

Enhanced Design for AWG-Based Dynamic Reconfigurable Free-Spectral-Range Group Hopping Coder/Decoders to Protect against Eavesdropping

2015 ◽  
Vol 764-765 ◽  
pp. 1240-1244
Author(s):  
Yao Tang Chang ◽  
Chung Wei Tsailin
Keyword(s):  
Spectral Range ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Free Spectral Range ◽  
Optical Switches ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Sequence Code ◽  
Code Division Multiple ◽  
Arrayed Waveguide

To further robust confidentiality protecting against eavesdropping over optical code-division multiple-access (OCDMA) networks, this study improves the robustness of the network toward eavesdropping for encryption/decryption mechanism by using a specified storage register controller controlling optical switches approach in which Free-spectral-range group hopping code is used to generate a specific signature address. This paper presents an enhanced security mechanism to protect spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) networks against eavesdropping. This study proposes an alternative to huge code-space size techniques such as wavelength hopping and exchange-encode for network protection against eavesdropping by exploiting the cyclic properties of arrayed-waveguide-grating routers and maximal-length sequence code (M-sequence code). In addition, the network is protected using a wavelength hopping based on optical switches and exchange the encode assignment scheme implemented using the exchange switches before import to arrayed-waveguide-grating routers (AWG).In this scheme, eavesdropper is difficult to solute correct user data bit , whatever there is using brute-force searching or simple energy detector..

scholarly journals Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer

2012 ◽  
Vol 20 (16) ◽  
pp. 18313 ◽  
Author(s):  
B. I. Akca ◽  
C. R. Doerr ◽  
G. Sengo ◽  
K. Wörhoff ◽  
M. Pollnau ◽  
...  
Keyword(s):  
Spectral Range ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Broad Spectral Range ◽  
Arrayed Waveguide

scholarly journals Optimal Design of an Ultrasmall SOI-Based 1 × 8 Flat-Top AWG by Using an MMI

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Hongqiang Li ◽  
Yaoting Bai ◽  
Xiaye Dong ◽  
Enbang Li ◽  
Yang Li ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Spectral Response ◽  
Beam Propagation Method ◽  
Silicon On Insulator ◽  
Optimized Design ◽  
Arrayed Waveguide Grating ◽  
Channel Spacing ◽  
Waveguide Grating ◽  
Passband Width ◽  
Arrayed Waveguide

Four methods based on a multimode interference (MMI) structure are optimally designed to flatten the spectral response of silicon-on-insulator- (SOI-) based arrayed-waveguide grating (AWG) applied in a demodulation integration microsystem. In the design for each method, SOI is selected as the material, the beam propagation method is used, and the performances (including the 3 dB passband width, the crosstalk, and the insertion loss) of the flat-top AWG are studied. Moreover, the output spectrum responses of AWGs with or without a flattened structure are compared. The results show that low insertion loss, crosstalk, and a flat and efficient spectral response are simultaneously achieved for each kind of structure. By comparing the four designs, the design that combines a tapered MMI with tapered input/output waveguides, which has not been previously reported, was shown to yield better results than others. The optimized design reduced crosstalk to approximately −21.9 dB and had an insertion loss of −4.36 dB and a 3 dB passband width, that is, approximately 65% of the channel spacing.

A Wavelength Interleaved DWDM ROF System with 60GHz Optical OFDM Signal

2011 ◽  
Vol 130-134 ◽  
pp. 2245-2248
Author(s):  
Yong Hong Ma ◽  
Chong Xiang Zhang ◽  
Pan Zhang
Keyword(s):  
High Speed ◽  
Radio Over Fiber ◽  
Experimental Results ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Access System ◽  
Ofdm Signal ◽  
The Future ◽  
Optical Ofdm ◽  
Arrayed Waveguide

we demonstrate a wavelength interleaved DWDM Radio-over-Fiber (ROF) system for providing 1-Gb/s OFDM signal in downlink and 1-Gb/s OOK data in uplink simultaneously. In this scheme, we use only one arrayed waveguide grating device at the remote node to realize both the de-multiplexing and multiplexing functions. The experimental results demonstrate that this scheme is feasible to the future broadband high-speed OFDM-ROF access system.

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