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High-frequency-stability laser at 1.5 microm using Doppler-free molecular lines
Optics Letters
|October 28, 2009
Summary
A semiconductor laser was stabilized using acetylene lines, achieving high frequency stability (10(-12)) and reproducibility (+/-10 kHz) across the 1.51-1.56 micrometer band.
Area of Science:
- Laser Physics
- Spectroscopy
- Metrology
Background:
- Frequency stabilization is crucial for precise laser applications.
- Extended-cavity semiconductor lasers offer tunable wavelength capabilities.
- Acetylene and HCN provide suitable absorption lines for frequency locking.
Purpose of the Study:
- To frequency stabilize an extended-cavity 1.5-micrometer semiconductor laser.
- To achieve long-term frequency stability and reproducibility.
- To demonstrate wavelength versatility using different molecular absorption lines.
Main Methods:
- Utilized saturated-absorption spectroscopy with acetylene (C2H2) and hydrogen cyanide (HCN).
- Employed an extended-cavity semiconductor laser operating around 1.5 micrometers.
- Measured long-term frequency stability and reproducibility.
Main Results:
- Achieved long-term frequency stability of the order of 10(-12).
- Demonstrated frequency reproducibility within +/-10 kHz.
- Successfully stabilized the laser at multiple wavelengths within the 1.51-1.56 micrometer band using C2H2 and HCN lines.
Conclusions:
- Extended-cavity semiconductor lasers can be effectively frequency stabilized.
- High stability and reproducibility are achievable using acetylene and HCN absorption lines.
- This technique enables versatile, stable laser sources across a significant portion of the 1.5-micrometer telecommunication band.
