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Design of 1.3-microm GaInAsP surface-emitting lasers for high-bandwidth operation.
Optics Letters
|September 22, 2009
Summary
High-speed Gallium Indium Arsenide Phosphide (GaInAsP) lasers require specific design for optimal performance. This study identifies 98% mirror reflectivity as key for high frequency operation and efficiency, while noting heating effects.
Area of Science:
- Optoelectronics
- Semiconductor Lasers
- Materials Science
Background:
- Surface-emitting lasers are crucial for high-speed applications.
- Gallium Indium Arsenide Phosphide (GaInAsP) is a key material for 1.3-micrometer lasers.
- Understanding design parameters is vital for optimizing laser performance.
Purpose of the Study:
- To describe important design considerations for high-speed GaInAsP 1.3-micrometer surface-emitting lasers.
- To analyze the impact of mirror reflectivity and thickness on laser frequency response.
- To investigate gain-saturation effects and thermal influences.
Main Methods:
- Utilized modified rate equations specific to surface-emitting lasers.
- Performed a small-signal analysis to calculate frequency response.
- Incorporated the effects of device heating into the analysis.
Main Results:
- Predicted an optimum mirror reflectivity of 98% for high-frequency operation and maximum quantum efficiency.
- Observed strong gain-saturation effects due to high photon densities.
- Determined that increased mirror thickness significantly reduces laser frequency response.
Conclusions:
- Optimal design of GaInAsP surface-emitting lasers involves careful control of mirror reflectivity and thickness.
- High photon densities lead to significant gain saturation.
- Thermal effects are a critical factor in the performance of these high-speed devices.
