Sub 23 μHz instantaneous linewidth and frequency stability measurements of the beat note from an offset phase locked single frequency heterodyned Nd:YAG laser system
| Autor: | D. A. Tulchinsky |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Beat (acoustics) 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Laser linewidth Optics Fiber optic sensor law Nd:YAG laser 0103 physical sciences Whispering-gallery wave Allan variance 0210 nano-technology business Microwave |
| Zdroj: | Optics express. 25(20) |
| ISSN: | 1094-4087 |
| Popis: | We report, what is to the best of our knowledge, the narrowest instantaneous linewidth measurement of the beat frequency between two phase locked heterodyned 1.319 μm Nd:YAG lasers. At both 65 kHz and 31.7 GHz beat frequencies, we measured the instantaneous 3 dB linewidth of the optically-generated microwave tones to be < 22.8 μHz, limited only by the minimum instrument resolution. Allan deviation measurements indicate that the laser system follows a 5 MHz quartz reference oscillator to stability levels of σy (1s) = 8.4 × 10−12. At 10.24 GHz, the laser system follows a sapphire loaded cavity oscillator to stability levels of σy (1s) = 1.6 × 10−11. For these measurements, the optical beat note closely follows the linewidth and stability of the driving microwave frequency reference. |
| Databáze: | OpenAIRE |
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