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High accuracy laser Doppler velocimeter using stable long-wavelength semiconductor lasers
Applied Optics
|June 18, 2010
Summary
We developed a compact, eye-safe Doppler velocimeter using stabilized InGaAsP laser diodes. This system achieves sub-centimeter per second velocity resolution over 100 meters, ideal for remote sensing applications.
Area of Science:
- Optics and Photonics
- Laser Technology
- Remote Sensing
Background:
- Compact and miniaturized Doppler velocimeters are crucial for remote velocity sensing.
- Existing systems may face limitations in size, safety, or resolution.
Purpose of the Study:
- To develop an eye-safe Doppler velocimeter with high velocity resolution.
- To utilize compact InGaAsP laser diodes for improved system design.
Main Methods:
- Employed external cavity stabilization techniques to reduce the linewidth of InGaAsP laser diodes.
- Integrated the stabilized diodes into an eye-safe Doppler velocimeter system operating at 1.54 micrometers.
Main Results:
- Achieved a diode linewidth of approximately 40 kHz.
- Demonstrated a velocity resolution of sub-centimeter per second.
- Validated performance over a distance of 100 meters.
Conclusions:
- The developed eye-safe Doppler velocimeter meets the requirements for compact and miniaturized remote sensing.
- External cavity stabilization effectively enhances laser diode performance for high-resolution velocity measurements.
