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Laser wavelength metrology with color sensor chips.
Optics Express
|December 25, 2015
Summary
We developed a low-cost laser wavelength meter using a commercial color sensor. This device achieves picometer-level precision, offering a cost-effective solution for precise wavelength measurements.
Area of Science:
- Optics and Photonics
- Sensor Technology
Background:
- Precise laser wavelength measurement is crucial for various scientific and industrial applications.
- Existing wavelength meters can be expensive and complex.
Purpose of the Study:
- To develop a novel, cost-effective laser wavelength meter.
- To evaluate the precision and stability of the developed device.
Main Methods:
- Utilized a commercial color sensor chip with an array of photodiodes and absorptive color filters.
- Determined light wavelength by comparing relative photodiode amplitudes.
- Incorporated etalon effects to enhance spectral features and improve precision.
Main Results:
- The developed wavelength meter demonstrated picometer-level precision.
- The device exhibited picometer-scale drift over a period exceeding one month.
- Measurements showed excellent agreement with a commercial wavelength meter and an atomic reference.
Conclusions:
- A low-cost, high-precision laser wavelength meter can be realized using a commercial color sensor.
- The device offers a viable alternative to expensive commercial wavelength meters.
- The technology shows potential for widespread adoption in spectroscopy and laser systems.
