Junchao Huang, Lingke Wang, Yifei Duan, Yafeng Huang, Meifeng Ye, Liang Liu, Tang Li. All-fiber-based laser with 200 mHz linewidth[J]. Chinese Optics Letters, 2019, 17(7): 071407
- Chinese Optics Letters
- Vol. 17, Issue 7, 071407 (2019)
Fig. 1. Experimental setup of the laser stabilization system. PZT: piezoelectric transducer; AOM: acousto-optic modulator; VCO: voltage-controlled oscillator; RF: radio frequency.
Fig. 2. Schematic of the vacuum chamber.
Fig. 3. Normalized FFT spectrum of the beat-note signal (blue circles) and its Gaussian fit (red line).
Fig. 4. Frequency noise PSD of (a) two identical FDL-stabilized lasers (black solid line), (b) thermomechanical noise from the optical fiber (red dash line), and (c) thermal noise of the first-stage amplifier after the photodiode (blue solid line).
Fig. 5. Fractional frequency instability of FDL-stabilized lasers. The dashed curve denotes the thermomechanical noise limit of the optical fiber.
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