광섬유 망을 통해 수 kHz의 좁은 선폭을 가지는 $1.5{\mu}m$ 레이저광원을 높은 전송 안정도로 전송하였다. 525 m 길이의 단일모드 광섬유를 통과하면서 발생하는 광 위상 잡음을 능동적으로 제거하는 실험 장치를 구성하였고, 이렇게 하여 전송된 광 주파수의 전송 안정도는 1 초의 평균시간에서 $2{\times}10^{-17}$ 로 측정되었다. 전송된 광 주파수의 품질을 주파수 영역과 시간 영역에서 정량적으로 분석하였다. We have transferred a narrow-linewidth $1.5{\mu}m$ laser beam through a 525 m fiber network with excellent transfer stability. The fiber-induced optical phase noise during the fiber transmission is cancelled by configuring a noise-canceling servo. The transfer instability was $2{\times}10^{-17}$ at 1 s of averaging time. We quantitatively analyzed the transferred optical frequency in the frequency domain and in the time domain.광섬유 망을 통해 수 kHz의 좁은 선폭을 가지는 $1.5{\mu}m$ 레이저광원을 높은 전송 안정도로 전송하였다. 525 m 길이의 단일모드 광섬유를 통과하면서 발생하는 광 위상 잡음을 능동적으로 제거하는 실험 장치를 구성하였고, 이렇게 하여 전송된 광 주파수의 전송 안정도는 1 초의 평균시간에서 $2{\times}10^{-17}$ 로 측정되었다. 전송된 광 주파수의 품질을 주파수 영역과 시간 영역에서 정량적으로 분석하였다. We have transferred a narrow-linewidth $1.5{\mu}m$ laser beam through a 525 m fiber network with excellent transfer stability. The fiber-induced optical phase noise during the fiber transmission is cancelled by configuring a noise-canceling servo. The transfer instability was $2{\times}10^{-17}$ at 1 s of averaging time. We quantitatively analyzed the transferred optical frequency in the frequency domain and in the time domain.

한국광학회지Feb 25, 20071 citation

Phase noise in coherent optical communications

Murat Azizoá ̧¡lu

Jan 1, 19914 citations

Report of optical frequency transfer via fiber

Zhang Lin-b

When a narrow-linewidth laser is transferred through a single-mode optical fiber,the phase noise induced by the environment,results in broadening of the laser linewidth.In this article,we introduced the basic principle of the fiber phase noise suppression,and established the experimental system of it.In the experiment we observed the laser phase noise suppression effect through the system of the fiber phase noise suppressing of a 20 m single-mode fiber,the precision of the optical frequency transfer is better than 3×10-18.When a narrow-linewidth laser is transferred through a single-mode optical fiber,the phase noise induced by the environment,results in broadening of the laser linewidth.In this article,we introduced the basic principle of the fiber phase noise suppression,and established the experimental system of it.In the experiment we observed the laser phase noise suppression effect through the system of the fiber phase noise suppressing of a 20 m single-mode fiber,the precision of the optical frequency transfer is better than 3×10-18.

Journal of Time and FrequencyJan 1, 20130 citations

Optical frequency standards

R. Ambartzymian, Nikolai G. Basov, P V Kryukov +1 more

IEEE Journal of Quantum ElectronicsJun 1, 19671 citation

Coherence transfer of subhertz-linewidth laser light via an optical fiber noise compensated by remote users

Lifei Wu, Yanyi Jiang, Chaoqun Ma +3 more

We present a technique for the coherence transfer of laser light through a fiber link, where the optical phase noise induced by environmental perturbation via the fiber link is compensated by remote users. When compensating the fiber noise by remote users, the time base at the remote site independent from that at the local site does not destroy the performance of the fiber output light. Using this technique, we demonstrate the transfer of subhertz-linewidth laser light through a 25-km-long, lab-based spooled fiber. After being compensated, the relative linewidth between the fiber input and output light is 1 mHz, and the relative frequency instability is 4×10−17 at 1 s averaging time and scales down to 2×10−19 at 800 s averaging time. The frequency uncertainty of the light after transferring through the fiber relative to that of the input light is 3.0×10−19. This system is suitable for the simultaneous transfer of an optical signal to a number of end users within a city.We present a technique for the coherence transfer of laser light through a fiber link, where the optical phase noise induced by environmental perturbation via the fiber link is compensated by remote users. When compensating the fiber noise by remote users, the time base at the remote site independent from that at the local site does not destroy the performance of the fiber output light. Using this technique, we demonstrate the transfer of subhertz-linewidth laser light through a 25-km-long, lab-based spooled fiber. After being compensated, the relative linewidth between the fiber input and output light is 1 mHz, and the relative frequency instability is 4×10−17 at 1 s averaging time and scales down to 2×10−19 at 800 s averaging time. The frequency uncertainty of the light after transferring through the fiber relative to that of the input light is 3.0×10−19. This system is suitable for the simultaneous transfer of an optical signal to a number of end users within a city.

Optics LettersSep 13, 201619 citations

광섬유 망을 통해 수 kHz의 좁은 선폭을 가지는

1.5{\mu}m

레이저광원을 높은 전송 안정도로 전송하였다. 525 m 길이의 단일모드 광섬유를 통과하면서 발생하는 광 위상 잡음을 능동적으로 제거하는 실험 장치를 구성하였고, 이렇게 하여 전송된 광 주파수의 전송 안정도는 1 초의 평균시간에서

2{\times}10^{-17}

로 측정되었다. 전송된 광 주파수의 품질을 주파수 영역과 시간 영역에서 정량적으로 분석하였다. We have transferred a narrow-linewidth

1.5{\mu}m

laser beam through a 525 m fiber network with excellent transfer stability. The fiber-induced optical phase noise during the fiber transmission is cancelled by configuring a noise-canceling servo. The transfer instability was

2{\times}10^{-17}

at 1 s of averaging time. We quantitatively analyzed the transferred optical frequency in the frequency domain and in the time domain.