Bhatti, A. and Al-Raweshidy, H.S. and Murtaza, G. (2000) Optical response of an all-fibre acoustooptic phase modulator using aluminium nitride coating. Optics Communications, 176 (4-6). pp. 355-363. ISSN 0030-4018.
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For the first time we present results on an all-fibre acoustooptic phase modulator using aluminium nitride (AlN) thin film as the piezoelectric coating. Two-dimensional axisymmetric finite element analysis was employed to determine the response of the modulator over a wide frequency range from 10 kHz to 700 MHz. Phase shifts of 0.823 rad/V/m in the low frequency region and 0.374 rad/V/m in the high frequency region were observed. At frequencies higher than 28 MHz the response is dominated by radial resonances of the fibre-coating composite. A theoretical investigation of the acoustic impedance showed that there is good impedance matching between the AlN piezoelectric coating and the glass fibre resulting in a high acoustic energy transfer of similar to 82% at the coating-fibre interface. (C) 2000 Elsevier Science B.V. All rights reserved.
|Uncontrolled keywords:||finite element analysis; AlN coating; piezoelectricity; phase modulation; acoustooptic devices; thin films|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK8300 Optoelectronic devices|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics|
|Depositing User:||P. Ogbuji|
|Date Deposited:||15 Apr 2009 14:44|
|Last Modified:||15 Apr 2009 14:44|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/16127 (The current URI for this page, for reference purposes)|
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