EXTRACTION D UN SIGNAL MÉTROLOGIQUE SUR UN LIEN OPTIQUE FIBRÉ

Transcription

1 Assemblée Générale REFIMEVE /06/2014 EXTRACTION D UN SIGNAL MÉTROLOGIQUE SUR UN LIEN OPTIQUE FIBRÉ Anthony Bercy LPL - Laboratoire de Physique des Lasers - Equipe MMTF SYRTE - Systèmes de Référence Temps Espace - Equipe FOP 1

2 PLAN NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION Financement ANR (LIOM LPL/SYRTE), Labex First-TF, contrat Européen EMRP NEAT-FT et IFRAF- Conseil Régional Ile-de-France. 2

3 NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION 3

4 NETWORK ARCHITECTURE Lab A Ex. : SYRTE Lab D Local Remote Local Remote Lab B Ex. : LKB Local Remote Lab C 4

5 NETWORK ARCHITECTURE Lab A Ex. : SYRTE Lab D Local In-Line Extraction In-Line Extraction Remote Lab B Ex. : LKB Remote Lab C First proposed by G Grosche, patent application DE Travail réalisé en collaboration avec S. Guellati du LKB 5

6 NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION 6

7 FIRST SETUP LASER Input OC f C = -f A - f B AOM 1 + L A f A In-line Extraction OC 1 L B f B Output AOM 2 + OC n 0 f 1 f 2 Output end Heterodyne Beat Detection PLL n 0 + f 1 + f 2 RF Signal f C + f A = - f B Optic Signal Extraction end 7

8 FIRST SETUP LASER Input OC f C = -f A - f B AOM 1 + L A f A In-line Extraction OC 1 L B f B Output AOM 2 + OC n 0 f 1 f 2 OC 3 Output end Heterodyne Beat Detection PLL OC 2 n 0 + f 1 + f 2 2f B RF Signal PD f C + f A = - f B Optic Signal 2 Extraction end n 0 + f 1 + f 2 f 2 AOM f B 8

9 User Supplier LPL 2 km 1 mile POP Renater In-line Extraction LKB Loop LPL Loop Paris Area Eiffel Tower LKB SYRTE 9

10 EXPERIMENTAL SETUP LPL Villetaneuse SYRTE Paris LKB Paris 43 km Input Output 3 km f A End-to-End Beatnote Extraction-to-End Beatnote f B 43 km Extraction 3 km 10

11 FIRST SETUP LASER Input OC AOM 1 + In-line Extraction OC 1 Output AOM 2 + OC OC 3 Heterodyne Beat Detection PLL OC 2 PD 2 AOM 3 + End-to-Extraction End-to-End 11

12 PHASE 12

13 PHASE NOISE Phase noise DSP (db [rad 2 /Hz]) End-to-End Free End-to-Extraction Free -60 End-to-End Compensated End-to-Extraction Compensated Fourier Frequency (Hz) 13

14 Allan Deviation y ( ) FREQUENCY STABILITY In-line 86 km End-to-End Free End-to-End Compensated & Extraction Free End-to-Extraction Compensated End-to-End Compensated End-to-Extraction Compensated Modified Averaging Time (seconds) 14

15 EXPERIMENTAL SETUP LPL Villetaneuse SYRTE Paris LKB Paris 43 km Input Output 3 km f A End-to-End Beatnote Extraction-to-End Beatnote f B 43 km Extraction 3 km 15

16 EXPERIMENTAL SETUP LPL Villetaneuse SYRTE Paris LKB Paris 43 km Output Input 3 km f A End-to-End Beatnote Extraction-to-End Beatnote f B 43 km Extraction 3 km 16

17 Allan Deviation y ( ) FREQUENCY STABILITY In-line 6 km End-to-End Free End-to-End Compensated & Extraction Free End-to-Extraction Compensated End-to-End Compensated End-to-Extraction Compensated Modified Averaging Time (seconds) 17

18 NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION 18

19 F Factor FACTEUR DE GAIN SUR LA COMPENSATION DU BRUIT PSD Bruit de Phase en extraction S E f = F S O f PSD Bruit de Phase en extrémité du lien F = L A L L A L In-line Extraction Position 19

20 Allan Deviation y ( ) Allan Deviation y ( ) FREQUENCY STABILITY In-line 6 km In-line 86 km End-to-End Free End-to-End Free End-to-End Compensated & Extraction Free End-to-End Compensated & Extracti End-to-Extraction Compensated End-to-Extraction Compen End-to-End Compensated End-to-End Com End-to-Extraction Compensated -18 Modified End-to-Extraction Compensated Modified Averaging Time (seconds) Averaging Time (seconds) 20

21 NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION 21

22 NETWORK ARCHITECTURE Lab A Ex. : SYRTE Lab D Local In-Line Extraction In-Line Extraction Remote Lab B Ex. : LKB Remote Lab C 22

23 L A In-line Extraction OC 1 L B LASER n DL = n 0 + f 1 + f 2 + f LO OC 5 OC 3 RF Signal OC 2 OC 4 OC 6 Optic Signal PD PD PD 2 PLL AOM 3 - x2 PLL Distant User LO n 0 + f 1 + f 2 23

24 NETWORK ARCHITECTURE FIRST SETUP PHASE NOISE COMPENSATION MODEL SECOND SETUP CONCLUSION 24

25 CONCLUSION DEMONSTRATION OF SIMPLE AND EFFICIENT EXTRACTION SETUP (Bercy et al, JosaB 2014) ALSO RF/OPTICAL EXTRACTION on fiber spools (Grosche, OL 2014, Gao et al, OL 2012 et Bai et al, OL 2013) and RF link (Krehlik et al I3E UFFC 2013) IN PROGRESS Length adjustment Fibers length adjusted in extraction interferometry Thermal box To stabilize the reference arm of the interferometry Diode laser To disseminate a frequency with more optical power Secondary link To disseminate a frequency far away Automatic re-lock 25