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09:10
Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
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Hybrid-integrated diode laser in the visible spectral range.
Optics Letters
|October 1, 2021
Summary
Researchers developed a hybrid-integrated diode laser for visible light generation. This novel photonic integrated circuit offers tunable, coherent light for advanced applications.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Semiconductor Lasers
Background:
- Visible light generation with tunable and coherent properties is crucial for biophotonics, precision metrology, and quantum technology.
- Photonic integrated circuits (PICs) offer a platform for miniaturized and efficient optical devices.
- Previous efforts have focused on broader spectral ranges or different integration schemes.
Purpose of the Study:
- To demonstrate the first hybrid-integrated diode laser operating in the visible spectral range.
- To achieve wide tunability and high coherence in visible light generation using PICs.
- To explore the potential of such lasers for advanced technological applications.
Main Methods:
- Hybrid integration of an Aluminum Gallium Indium Phosphide (AlGaInP) optical amplifier.
- Coupling the amplifier to a low-loss Silicon Nitride (Si3N4) feedback circuit.
- Utilizing microring resonators within the feedback circuit for wavelength selection and tuning.
Main Results:
- Achieved spectral coverage of 10.8 nm around a 684.4 nm wavelength.
- Obtained up to 4.8 mW of output power.
- Measured an intrinsic linewidth of 2.3±0.2 kHz, indicating high coherence.
Conclusions:
- The presented hybrid-integrated diode laser is a significant advancement for visible light generation on a chip.
- This technology enables compact, tunable, and coherent light sources for demanding applications.
- Further development could lead to widespread adoption in biophotonics, metrology, and quantum technologies.
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