Abu Sahmah Mohd. Supa'at, (2006) Optimization of Y-junction structure for digital optical switch. In: Advances In Optical Waveguides. Penerbit UTM, Johor , pp. 12-19. ISBN 978-983-52-0668-9
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Waveguide based digital optical switch (DOS) which operating through modal evolution has become a very attractive component on optical communication system due to their digital response against applied power. The DOS is useful in the sense that additional applied power, beyond the switching power, does not degrade the crosstalk (CT). This characteristic enables the device to be insensitive to electrical power applied, polarization, wavelength, temperature and geometrical variations . Various DOS have been developed using silica on silicon , silicon resin , polymers , and LiNbO3 . Typically, this switch is formed of Y-branch waveguides. Two waveguides branches intersect to define a Y-shape structure with a very small angle to minimize mode coupling between the local system modes. Nevertheless, it causes difficulty in fabrication process. Further more, this small branching angle leads to long interaction lengths  thus it is not sufficient for large switching matrix which requires cascading many stages of switches. This chapter presents the design of Y-junction structure for DOS so that the DOS exhibit low crosstalk with low power consumption. The optimization was done using finite difference beam propagation method (FD- BPM).
|Item Type:||Book Section|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Deposited By:||Liza Porijo|
|Deposited On:||25 May 2012 04:01|
|Last Modified:||25 May 2012 04:01|
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