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Micromachined, silicon filament light source for spectrophotometric microsystems
Juliana Tu1, Dwight Howard, Scott D Collins
1MicroInstruments and Systems Laboratory, University of California, Davis, Davis, California 95616, USA.
Applied Optics
|May 10, 2003
Summary
Researchers developed a stable, miniature broadband light source using silicon filaments for microspectrophotometry. This silicon-based light source offers high stability and controlled spectral output, crucial for advanced optical systems.
Area of Science:
- Optoelectronics
- Materials Science
- Spectroscopy
Background:
- Miniature broadband light sources are essential for compact spectrophotometric microsystems.
- Existing technologies may lack the required stability or spectral characteristics for certain applications.
Purpose of the Study:
- To design, fabricate, and characterize a highly stable, miniature broadband light source.
- To utilize single-crystal silicon filaments for enhanced performance and stability.
Main Methods:
- Fabrication of miniature silicon filament light sources.
- Measurement of electrical characteristics (current-voltage) and radiant emittance spectra.
- Analysis of filament dimensions, operating temperature, and resistance drift.
Main Results:
- A maximum stable operating temperature of 1200 K was estimated for the silicon filaments.
- Resistance drift was less than 0.5% over 10 hours of continuous operation.
- Emittance spectra matched theoretical blackbody radiation, achieving 10.7 mW radiated power.
Conclusions:
- The developed silicon filament light source is highly stable and suitable for spectrophotometric microsystems.
- The device demonstrates predictable spectral output comparable to blackbody radiation.
- This technology offers a promising solution for miniaturized optical sensing applications.