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Stress plate optical modulator for circular dichroism measurements
Applied Optics
|January 15, 2010
Summary
This study introduces a novel fused silica stress plate modulator, offering high transmission and large aperture for electrooptic modulation. It operates efficiently at resonance, enabling sensitive measurements in circular dichroism applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Existing electrooptic modulators often have limitations in transmission range or aperture size.
- There is a need for efficient modulation devices for sensitive spectroscopic measurements.
Purpose of the Study:
- To describe a novel fused silica stress plate modulator with enhanced performance characteristics.
- To detail its construction and operational parameters for electrooptic modulation.
Main Methods:
- Design and construction of a fused silica stress plate modulator.
- Operation at electromechanical resonance frequency (16.7 kHz).
- Integration into a circular dichroism apparatus for performance testing.
Main Results:
- The modulator exhibits high transmission across a broad wavelength range and a large aperture.
- Low voltage and low power operation is achieved at resonance for +/-lambda/4 plate functionality.
- Enabled measurement of small effects (1 part in 10^5) in circular dichroism.
Conclusions:
- The fused silica stress plate modulator presents significant advantages over conventional devices.
- Its design facilitates sensitive measurements and has potential for vacuum ultraviolet applications.
