Ultra-stable microwave generation with a diode-pumped solid-state laser in the 1.5-μm range
| Autor: | Vladimir Dolgovskiy, Gianni Di Domenico, Serge Grop, Thomas Südmeyer, Stéphane Schilt, Vincent Giordano, Benoit Dubois, Nikola Bucalovic |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry General Engineering General Physics and Astronomy Comb generator Physics::Optics Laser 7. Clean energy Noise floor law.invention Frequency divider Frequency comb Optics law Diode-pumped solid-state laser Phase noise Physics::Atomic Physics business Microwave |
| Popis: | We demonstrate the first ultra-stable microwave generation based on a 1.5-μm diode-pumped solid-state laser (DPSSL) frequency comb. Our system relies on optical-to-microwave frequency division from a planar-waveguide external cavity laser referenced to an ultra-stable Fabry–Perot cavity. The evaluation of the microwave signal at ~10 GHz uses the transportable ultra-low-instability signal source ULISS®, which employs a cryo-cooled sapphire oscillator. With the DPSSL comb, we measured −125 dBc/Hz phase noise at 1 kHz offset frequency, likely limited by the photo-detection shot-noise or by the noise floor of the reference cryo-cooled sapphire oscillator. For comparison, we also generated low-noise microwave using a commercial Er:fiber comb stabilized in similar conditions and observed >20 dB lower phase noise in the microwave generated from the DPSSL comb. Our results confirm the high potential of the DPSSL technology for low-noise comb applications. |
| Databáze: | OpenAIRE |
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