Abstract

A novel all-in-fiber method for coupling light to high-Q silica whispering gallery mode (WGM) optical micro-resonators is presented, which is based on a pair of long period fiber gratings (LPGs) written in the same silica fiber, along with a thick fiber taper (15–18 μm in waist) in between the LPGs. The proposed coupling structure is robust and can be replicated many times along the same fiber simply cascading LPGs with different bands. Typical Q-factors of the order of 108 and total coupling efficiency up to 60% were measured collecting the resonances of microspheres or microbubbles at the fiber end. This approach uniquely allows quasi-distributed and wavelength selective addressing of different micro-resonators along the same fiber.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Long period grating-based fiber coupler to whispering gallery mode resonators

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. Nunzi Conti
Opt. Lett. 39(22) 6525-6528 (2014)

Strain-induced spectral tuning of the whispering gallery modes in a cylindrical micro-resonator formed by a polymer optical fiber

Vishnu Kavungal, Arun Kumar Mallik, Gerald Farrell, Qiang Wu, and Yuliya Semenova
Appl. Opt. 56(5) 1339-1345 (2017)

Whispering gallery mode micro resonators for multi-parameter sensing applications

Arun Kumar Mallik, Gerald Farrell, Manjusha Ramakrishnan, Vishnu Kavungal, Dejun Liu, Qiang Wu, and Yuliya Semenova
Opt. Express 26(24) 31829-31838 (2018)

References

  • View by:
  • |
  • |
  • |

  1. D. A. Krohn, Fiber Optical Sensors: Fundamentals and Applications (Instrument Society of America, Research Triangle Park, 2000).
  2. M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).
  3. J. Ward and O. Benson, “WGM microresonators: sensing, lasing and fundamental optics with microspheres,” Laser Photonics Rev. 5(4), 553–570 (2011).
    [Crossref]
  4. F. Vollmer and S. Arnold, “Whispering-gallery-mode biosensing: label-free detection down to single molecules,” Nat. Methods 5(7), 591–596 (2008).
    [Crossref] [PubMed]
  5. D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
    [Crossref]
  6. J. C. Knight, G. Cheung, F. Jacques, and T. A. Birks, “Phase-matched excitation of whispering-gallery-mode resonances by a fiber taper,” Opt. Lett. 22(15), 1129–1131 (1997).
    [Crossref] [PubMed]
  7. D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
    [Crossref] [PubMed]
  8. D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
    [Crossref]
  9. M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
    [Crossref]
  10. T. Erdogan, “Fiber grating spectra,” J. Lightwave Technol. 15(8), 1277–1294 (1997).
    [Crossref]
  11. C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
    [Crossref]
  12. S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
    [Crossref] [PubMed]
  13. R. Murphy, S. James, and R. Tatam, “Multiplexing of fibre optic long period grating based interferometric sensors,” J. Lightwave Technol. 25(3), 825–829 (2007).
    [Crossref]
  14. M. L. Gorodetsky and V. S. Ilchenko, “Optical microsphere resonators: optimal coupling to high-Q whispering-gallery modes,” J. Opt. Soc. Am. B 16(1), 147–154 (1999).
    [Crossref]
  15. Y. Sun and X. Fan, “Optical ring resonators for biochemical and chemical sensing,” Anal. Bioanal. Chem. 399(1), 205–211 (2011).
    [Crossref] [PubMed]

2015 (2)

M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

2014 (2)

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

2011 (4)

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

J. Ward and O. Benson, “WGM microresonators: sensing, lasing and fundamental optics with microspheres,” Laser Photonics Rev. 5(4), 553–570 (2011).
[Crossref]

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Y. Sun and X. Fan, “Optical ring resonators for biochemical and chemical sensing,” Anal. Bioanal. Chem. 399(1), 205–211 (2011).
[Crossref] [PubMed]

2008 (1)

F. Vollmer and S. Arnold, “Whispering-gallery-mode biosensing: label-free detection down to single molecules,” Nat. Methods 5(7), 591–596 (2008).
[Crossref] [PubMed]

2007 (1)

2006 (1)

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

1999 (1)

1997 (2)

Arnold, S.

F. Vollmer and S. Arnold, “Whispering-gallery-mode biosensing: label-free detection down to single molecules,” Nat. Methods 5(7), 591–596 (2008).
[Crossref] [PubMed]

Baldini, F.

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Barucci, A.

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

Benson, O.

J. Ward and O. Benson, “WGM microresonators: sensing, lasing and fundamental optics with microspheres,” Laser Photonics Rev. 5(4), 553–570 (2011).
[Crossref]

Berneschi, S.

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

Birks, T. A.

Brenci, M.

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Calzolai, R.

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Cheung, G.

Chiavaioli, F.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Conti, G. N.

Cosi, F.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Erdogan, T.

T. Erdogan, “Fiber grating spectra,” J. Lightwave Technol. 15(8), 1277–1294 (1997).
[Crossref]

Fan, X.

Y. Sun and X. Fan, “Optical ring resonators for biochemical and chemical sensing,” Anal. Bioanal. Chem. 399(1), 205–211 (2011).
[Crossref] [PubMed]

Farnesi, D.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

Ferrari, M.

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

Foreman, M. R.

M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).

Gorodetsky, M. L.

Ilchenko, V. S.

Jacques, F.

James, S.

Jorge, P.

Knight, J. C.

Mugnaini, M.

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Murphy, R.

Nunzi Conti, G.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Pelli, S.

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Righini, G. C.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

Ristic, D.

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

Soria, S.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

S. Berneschi, D. Farnesi, F. Cosi, G. N. Conti, S. Pelli, G. C. Righini, and S. Soria, “High Q silica microbubble resonators fabricated by arc discharge,” Opt. Lett. 36(17), 3521–3523 (2011).
[Crossref] [PubMed]

Sun, Y.

Y. Sun and X. Fan, “Optical ring resonators for biochemical and chemical sensing,” Anal. Bioanal. Chem. 399(1), 205–211 (2011).
[Crossref] [PubMed]

Swaim, J. D.

M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).

Tatam, R.

Trono, C.

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

D. Farnesi, F. Chiavaioli, G. C. Righini, S. Soria, C. Trono, P. Jorge, and G. N. Conti, “Long period grating-based fiber coupler to whispering gallery mode resonators,” Opt. Lett. 39(22), 6525–6528 (2014).
[Crossref] [PubMed]

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Vollmer, F.

M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).

F. Vollmer and S. Arnold, “Whispering-gallery-mode biosensing: label-free detection down to single molecules,” Nat. Methods 5(7), 591–596 (2008).
[Crossref] [PubMed]

Ward, J.

J. Ward and O. Benson, “WGM microresonators: sensing, lasing and fundamental optics with microspheres,” Laser Photonics Rev. 5(4), 553–570 (2011).
[Crossref]

Adv. Opt. Photonics (1)

M. R. Foreman, J. D. Swaim, and F. Vollmer, “Whispering gallery mode sensors,” Adv. Opt. Photonics 7(2), 168–240 (2015).

Anal. Bioanal. Chem. (1)

Y. Sun and X. Fan, “Optical ring resonators for biochemical and chemical sensing,” Anal. Bioanal. Chem. 399(1), 205–211 (2011).
[Crossref] [PubMed]

J. Lightwave Technol. (2)

J. Opt. Soc. Am. B (1)

Laser Photonics Rev. (1)

J. Ward and O. Benson, “WGM microresonators: sensing, lasing and fundamental optics with microspheres,” Laser Photonics Rev. 5(4), 553–570 (2011).
[Crossref]

Meas. Sci. Technol. (1)

C. Trono, F. Baldini, M. Brenci, F. Chiavaioli, and M. Mugnaini, “Flow cell for strain- and temperature-compensated refractive index measurements by means of cascaded optical fibre long period and Bragg gratings,” Meas. Sci. Technol. 22(7), 075204 (2011).
[Crossref]

Nat. Methods (1)

F. Vollmer and S. Arnold, “Whispering-gallery-mode biosensing: label-free detection down to single molecules,” Nat. Methods 5(7), 591–596 (2008).
[Crossref] [PubMed]

Opt. Lett. (3)

Proc. SPIE (3)

D. Farnesi, F. Chiavaioli, F. Cosi, G. C. Righini, S. Soria, C. Trono, and G. Nunzi Conti, “Cladding modes fiber coupling to silica micro-resonators based on long period gratings,” Proc. SPIE 9343, 934318 (2015).
[Crossref]

M. Brenci, R. Calzolai, F. Cosi, G. Nunzi Conti, S. Pelli, and G. C. Righini, “Microspherical resonators for biophotonic sensors,” Proc. SPIE 6158, 61580S (2006).
[Crossref]

D. Farnesi, G. C. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, and G. Nunzi Conti, “Coupling light to whispering gallery mode resonators,” Proc. SPIE 9133, 913314 (2014).
[Crossref]

Other (1)

D. A. Krohn, Fiber Optical Sensors: Fundamentals and Applications (Instrument Society of America, Research Triangle Park, 2000).

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)

Fig. 1
Fig. 1 Schematic representation of the fiber based coupling unit consisting of a pair of LPGs and a taper in between.
Fig. 2
Fig. 2 Transmission spectra of the two single LPGs (solid red line) showing minimum transmission at the wavelengths of 1518.99 nm (Λ = 340 μm) and 1613.31 nm (Λ = 365 μm), respectively, and of the two LPG pairs together (solid blue line). The grey line crosses the −3 dB value of the attenuation dips of the single LPG and corresponds to the maximum LPG-based MZI contrast.
Fig. 3
Fig. 3 Sketch of the LPG pair-based coupling units exciting WGMs in both microspheres (a) and microbubbles (b), along with an example of typical WGM resonances obtained for both micro-cavities. The two insets show the maximum coupling efficiency obtained for both types of micro-cavities.
Fig. 4
Fig. 4 Sketch of two in series coupling units with both resonators (circle) coupled to each tapered section of the fiber and corresponding resonances obtained by scanning the laser source around the LPGs central wavelengths (0 MHz detuning) (a). First resonator in contact, second not (b). Second resonator in contact, first not (c). The resonances of each coupling unit remain unchanged proving they are independently excited without cross-talk.

Metrics