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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Second-harmonic generation in AlGaAs microdisks in the telecom range.
Optics Letters
|July 1, 2014
Summary
We demonstrated efficient second-harmonic generation in aluminum gallium arsenide (AlGaAs) microcavities. This breakthrough enables monolithic photonic chip integration for telecom applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Semiconductor Physics
Background:
- Whispering-gallery-mode (WGM) microcavities offer enhanced light-matter interaction.
- AlGaAs is a promising material for nonlinear optical applications.
- Efficient frequency conversion is crucial for photonic integrated circuits.
Purpose of the Study:
- To investigate second-harmonic generation (SHG) in AlGaAs WGM microcavities.
- To assess the feasibility of these devices for telecom applications.
- To demonstrate monolithic integration potential.
Main Methods:
- Fabrication of AlGaAs microcavities suspended on a GaAs pedestal.
- Experimental setup for pumping the microcavities at 1.58 μm.
- Measurement of frequency-doubled output power and conversion efficiency.
Main Results:
- Observed second-harmonic generation with a pump wavelength of 1.58 μm.
- Achieved a conversion efficiency of 7×10⁻⁴ W⁻¹.
- Demonstrated the potential for integration into monolithic photonic chips.
Conclusions:
- AlGaAs WGM microcavities are effective for efficient frequency doubling.
- The demonstrated device is suitable for classical and quantum applications in the telecom band.
- This work paves the way for advanced photonic integrated circuits.
