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Narrow-linewidth master-oscillator power amplifier based on a semiconductor tapered amplifier
Applied Optics
|February 21, 2008
Summary
A new laser system combines a grating-stabilized diode laser with a tapered amplifier, achieving 500 mW output power and narrow linewidth. This high-power, narrow-linewidth laser is ideal for advanced spectroscopy applications.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Laser Physics and Photonics
Background:
- Grating-stabilized diode lasers offer narrow linewidths but limited output power.
- Semiconductor tapered amplifiers can increase laser output power but often broaden the linewidth.
Purpose of the Study:
- To develop a high-power, narrow-linewidth laser source by combining a master oscillator and a power amplifier.
- To demonstrate the utility of this laser system for high-resolution spectroscopic measurements.
Main Methods:
- Injected a grating-stabilized external-cavity diode laser into a semiconductor tapered amplifier (master-oscillator power amplifier configuration).
- Characterized the output power and spectral linewidth of the amplified laser output.
- Performed Doppler-free two-photon spectroscopy on rubidium atoms.
Main Results:
- Achieved up to 500 mW of output power.
- Maintained a narrow linewidth, with the tapered amplifier adding minimal additional broadening compared to the master oscillator.
- Successfully demonstrated Doppler-free two-photon spectroscopy with the system.
Conclusions:
- The master-oscillator power amplifier configuration effectively produces high-power, narrow-linewidth laser output.
- This laser system is a valuable tool for precision spectroscopy, enabling advanced atomic physics experiments.
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