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http://hdl.handle.net/2074/1428
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| Title: | Absorption-based fiber optic surface plasmon resonance sensor: a theoretical evaluation |
| Authors: | Sharma, Anuj K
Gupta, B D |
| Keywords: | Optical fiber
Surface plasmon resonance
Absorption
Sensor |
| Issue Date: | 2004 |
| Citation: | Sensors and Actuators B: Chemical, 100(3), 423-431 |
| Abstract: | In this paper, an optical absorption based fiber optic surface plasmon resonance (SPR) sensor has been studied theoretically. The theoretical treatment is based on Kretschmann’s SPR theory and the Lorentz model that expresses a damped harmonic oscillator is included in the treatment for optical absorption in the sensing layer. The optical source considered is an un-polarized collimated beam. The light is coupled to the fiber using a microscope objective that focuses the beam at the center of the input face of the fiber. The effects of the parameters related to the sensing region, the light source and the optical fiber on the sensitivity and the operating range of the SPR sensor have been studied with the help of numerical calculations and computer simulations. It has been found that the excitation frequency in absorption-based fiber optic SPR sensor is an important parameter. The sensitivity is better for the lower off-resonance excitation frequency. The sensitivity and the operating r... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/1428 |
| Appears in Collections: | Physics
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