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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| Official URL http://dx.doi.org/10.1016/S0030-4018(00)00496-X |
Abstract
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.
| Item Type: | Article |
|---|---|
| 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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