Woolsey, G.A. and Fisher, N.E. and Jackson, D.A. (1997) Tuning a bulk-glass optical current sensor by controlling conditions external to its reflecting surfaces. Sensors and Actuators a-Physical, 63 (1). pp. 27-32. ISSN 0924-4247.
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In a bulk-glass triangular Faraday current sensor, the stringent conditions required to provide critical-angle reflection at each reflecting surface are difficult to achieve. High tolerances for both the optical geometry of the sensor and the wavelength of the laser source are required. Here we present a method of essentially tuning the sensor for optimum operation by matching the angle of reflection at each surface to the wavelength of the laser source. This is done by controlling the gaseous environment external to each of the reflecting surfaces. The technique is demonstrated using sulphur hexafluoride (SF6), which has the advantage of a relatively large refractive index.
|Uncontrolled keywords:||Bulk-glass current sensors; Tuning|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics|
|Depositing User:||T.J. Sango|
|Date Deposited:||17 Apr 2009 11:25|
|Last Modified:||17 Apr 2009 11:25|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/18049 (The current URI for this page, for reference purposes)|
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