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Intensity noise reduction in a single-frequency ytterbium-codoped erbium laser
Optics Letters
|November 3, 2009
Summary
We suppressed intensity noise in a diode-pumped erbium laser using optoelectronic feedback. This resulted in a 30-dB reduction in noise, achieving a relative intensity noise of 2114 dByHz.
Area of Science:
- Lasers and Photonics
- Materials Science
- Optical Engineering
Background:
- Diode-pumped lasers are crucial for various applications.
- Intensity noise limits laser performance.
- Erbium-ytterbium codoped bulk-glass lasers offer specific wavelength advantages.
Purpose of the Study:
- To investigate intensity noise suppression in a specific laser system.
- To reduce relaxation oscillation noise using feedback.
- To characterize the noise performance and output power.
Main Methods:
- Utilized a diode-pumped, single-frequency erbium bulk-glass laser.
- Employed an optoelectronic feedback circuit for noise reduction.
- Measured relative intensity noise and output power at 1533 nm.
Main Results:
- Achieved a 30-dB reduction in the relaxation oscillation peak.
- Reduced the noise to a relative intensity noise of 2114 dByHz.
- Obtained a useful output power of 15 mW at 1533 nm.
Conclusions:
- Optoelectronic feedback is effective for intensity noise suppression in erbium lasers.
- The developed method significantly improves laser stability.
- The laser system is suitable for applications requiring low noise and specific wavelengths.
