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Applications of fiber-optic evanescent wave spectroscopy
1Department of Pharmacy and Administrative Sciences, St. John's University, Jamaica, New York 11439, USA.
Drug Development and Industrial Pharmacy
|January 7, 1999
Summary
Evanescent wave (EW) spectroscopy uses light's evanescent wave component for environmental sensing. This technique offers a promising method for analyzing pharmaceutical systems and advancing photonics.
Area of Science:
- Photonics
- Spectroscopy
- Fiber optics
Background:
- Evanescent waves (EW) are electromagnetic fields that decay exponentially from a surface.
- Fiber-optic waveguides can propagate light, allowing EWs to interact with the fiber's immediate environment.
Purpose of the Study:
- To outline the theoretical and practical aspects of evanescent wave spectroscopy.
- To discuss the advantages, disadvantages, and limitations of EW spectroscopy.
- To explore applications of EW spectroscopy in pharmaceutical analysis.
Main Methods:
- Theoretical analysis of evanescent wave propagation in optical fibers.
- Practical considerations for implementing EW spectroscopy.
- Case studies demonstrating EW spectroscopy in pharmaceutical systems.
Main Results:
- EW spectroscopy provides a method for sensing and transmitting environmental information from the fiber surface.
- The technique has demonstrated utility in the analysis of pharmaceutical systems.
- Evaluation of EW spectroscopy components enables future predictions.
Conclusions:
- Evanescent wave spectroscopy is an emerging and rapidly evolving area of photonics.
- The technique offers unique advantages for surface-sensitive measurements.
- Further development holds significant potential for various analytical applications, particularly in pharmaceuticals.