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Optimal intensity noise reduction in multimode vertical-cavity surface-emitting lasers by polarization-selective
Marco Romanelli1, Elisabeth Giacobino, Alberto Bramati
1Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Place Jussieu, Paris, France.
Optics Letters
|August 18, 2004
Summary
Small polarization-dependent losses significantly reduce intensity noise in vertical-cavity surface-emitting lasers. This study identifies and demonstrates optimal conditions for minimizing noise through polarization mode anticorrelation.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
Background:
- Vertical-cavity surface-emitting lasers (VCSELs) are crucial components in optical communication and sensing.
- Intensity noise in VCSELs can degrade system performance.
- Polarization modes in VCSELs can exhibit anticorrelation, influencing noise characteristics.
Purpose of the Study:
- To investigate the impact of polarization mode anticorrelation on the total intensity noise of VCSELs.
- To determine the role of polarization-dependent losses in noise reduction.
- To experimentally validate conditions for optimal intensity noise reduction.
Main Methods:
- Theoretical analysis of polarization mode dynamics and intensity noise.
- Introduction of controlled polarization-dependent losses.
- Experimental measurements of total intensity noise in VCSELs.
Main Results:
- Anticorrelation of polarization modes significantly affects total intensity noise.
- Small polarization-dependent losses can substantially improve intensity noise.
- Specific conditions for optimal noise reduction were identified and experimentally confirmed.
Conclusions:
- Polarization mode anticorrelation is a key factor in managing VCSEL intensity noise.
- Implementing small polarization-dependent losses offers an effective strategy for noise suppression.
- The findings provide practical guidelines for designing low-noise VCSELs.