High resolution frequency standard dissemination via optical fiber metropolitan network

Narbonneau, F.; Lours, M.; Bize, S.; Clairon, A.; Santarelli, Giorgio; Lopez, Olivier; Daussy, Christophe; Amy‐Klein, Anne; Chardonnet, Ch.

doi:10.1063/1.2205155

Cited by 147 publications

(104 citation statements)

References 22 publications

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“…Nous avons ainsi obtenu un transfert de fréquences RF et microondes avec une stabilité de 10 −15 sur une durée de 1 s et de 10 −18 sur une journée. Ces résultats nous ont alors placés en position de leader au niveau mondial pour le transfert RF à moyenne distance [15][16][17][18].…”

Section: Principe Du Transfert De Fréquence Par Fibre Optiqueunclassified

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Transfert de fréquence par fibre optique en métrologie

Santarelli¹,

Lopez²,

Kéfélian³

et al. 2014

R. franç. métrol.

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RésuméL'utilisation de la fibre optique pour la comparaison et la distribution de références ultrastables de fréquence s'est fortement développée ces dix dernières années. Le LNE-SYRTE et le LPL sont des laboratoires pionniers dans l'étude et le développement de ces techniques. La stabilité de fréquence et l'exactitude des liens optiques fibrés surpassent désormais les performances des méthodes classiques qui exploitent les satellites GPS ou géostationnaires. Dans cet article nous présentons une revue des méthodes et des résultats obtenus. Nous montrons également qu'il est possible d'utiliser les réseaux fibrés de l'internet pour réali-ser la comparaison et la distribution des signaux métrologiques ultrastables sur de longues distances. La stabilité et l'exactitude de tels liens sur réseaux fibrés de l'internet sont aujourd'hui proches des limites que l'on peut attendre sur une fibre optique dédiée à cette application. Cette nouvelle technique ouvre la voie au déploiement au niveau national et international d'un réseau optique métrologique ultrastable. MOTS CLÉS : TEMPS, FRÉQUENCE, LIEN OPTIQUE FIBRÉ, LASER STABLE. AbstractThe distribution and the comparison of an ultrastable reference frequency using optical fibres have been greatly improved in the last ten years.

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Section: Principe Du Transfert De Fréquence Par Fibre Optiqueunclassified

“…La toute première expérience a été réalisée à 100 MHz sur une distance de 43 km [15,16]. Ensuite nous avons augmenté la fréquence à 1 GHz puis à 9,15 GHz et réa-lisé un lien sur 86 km en plaçant les deux fibres en sé-rie puis sur 176 km en complétant par des bobines de fibres [17,18].…”

Section: Transfert Radiofréquence Et Micro-ondeunclassified

Transfert de fréquence par fibre optique en métrologie

Santarelli¹,

Lopez²,

Kéfélian³

et al. 2014

R. franç. métrol.

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“…수준의 상대주파수 정확도를 가지는 주파수 표준 [1] 이 실현되 고 있는 추세에 발맞추어, 광섬유를 통한 기준 주파수의 전 송 방법은 기존의 위성 시스템을 이용한 무선 전송의 한계를 뛰어넘을 강력한 후보로서 활발히 연구되고 있다 [2][3][4][5][6][7][8] . 또한, 광섬유를 통한 신호의 전송은 구리 재질의 동축케이블을 이 용할 때보다 신호의 손실이 작아서 멀리 떨어진 곳까지 높은 안정도의 기준 주파수를 전송할 수 있다는 장점을 가지고 있 다.…”

Section: 서 론 최근 들어 주파수 표준기의 비약적인 발전으로 인해 10 -18unclassified

“…광섬유 를 통한 전송 과정에서 발생하는 위상잡음을 능동적으로 제 거하는 방법에 관한 연구가 세계적으로 활발하게 진행되어, 현재 100 km가 넘는 거리까지 기준 주파수를 광섬유 위상잡 음 없이 전송하는 결과가 보고되고 있다 [8] . 현재, 광섬유를 통한 높은 안정도의 기준 주파수 전송 방법은 주파수 표준 간의 비교에 쓰이고 있을 뿐만 아니라 [2][3][4][5][6][7][8] FIG. 1.…”

Section: 서 론 최근 들어 주파수 표준기의 비약적인 발전으로 인해 10 -18unclassified

Cancellation of Phase Noise in 1.4 GHz RF Signal Transferred to a Remote Site through 13 km Fiber

Lee¹,

Park²,

Mun³

et al. 2010

Korean Journal of Optics and Photonics

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“…The improvement of the short-term frequency stability also improves the phase noise performance of the generated carrier [42] In order to investigate and analyze the short-term frequency stability, it is important to observe the frequency stability with very short sampling duration (μs or lower). The maximum observation speed of our setup is limited by data recording speed of the simulator and it is 100 ms.…”

Section: Short Term Frequency Stabilitymentioning

confidence: 99%

Carrier generation using a dual-frequency distributed feedback waveguide laser for phased array antenna (PAA)

Khan

Islam

Sarowar

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Carrier generation based on optical heterodyning techniques where a beat signal is generated from the mixing of two light sources can be interesting solution due to ease on tunability. The free running heterodyning scheme benefits with a very wide tuning capability and the generated carrier can be freely adjusted. However, the drawbacks come in the form of frequency stability. Heterodyning of two optical frequencies coming from a single laser cavity has shown its potential on improvement of frequency stability. Methods: The impact of the laser parameters (i.e., optical power and linewidth) on the quality of the generated carrier (i.e., phase/frequency stability and carrier-to-noise ratio) is analyzed for a 25 × 64 elements PAA system. An optically generated carrier signal using a dual-frequency distributed feedback waveguide laser in ytterbium doped aluminum oxide (Al 2 O 3 :Yb 3+ ) is analyzed and experimentally demonstrated in this paper. The carrier signal is used for downconversion of the signal received from a phased array antenna (PAA) of a DVB-S (Digital Video Broadcasting-Satellite) system. Results: An optical frequency locked loop (OFLL) to stabilize the generated carrier is implemented which results in a microwave frequency at ∼14 GHz with a phase noise of -75 dBc/Hz at 1 MHz offset from the center frequency and gives a loop settling time of 12 μs. By using the proposed OFLL, the long term and the short term frequency stability of the generated carrier has an Allan deviation of more than 1 × 10 −10 for an averaging time of 1000 s and a standard deviation of 39.4 kHz, respectively. The lasers linewidth should be in the order of tens of Hz, with a maximum relative intensity noise (RIN) of -107 dB/Hz and a minimum optical power of 0.94 mW. Conclusions: The optical carrier generation by OFLL using a DFL to comply with the requirements of the standard carrier used in commercial LNBs has been investigated. The detailed analysis of the OFLL scheme is presented. Specifications requirement on carrier power, linewidth and relative intensity noise of the optically generated carrier have been addressed. The optical carrier generation is experimentally demonstrated and the requirements on CNR have been determined by measuring the noise floor and the optical carrier power. The measured values are compared with the calculated values and found to be very close.

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High resolution frequency standard dissemination via optical fiber metropolitan network

Cited by 147 publications

References 22 publications

Transfert de fréquence par fibre optique en métrologie

Transfert de fréquence par fibre optique en métrologie

Cancellation of Phase Noise in 1.4 GHz RF Signal Transferred to a Remote Site through 13 km Fiber

Carrier generation using a dual-frequency distributed feedback waveguide laser for phased array antenna (PAA)

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