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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 7, Iss. 11 — Nov. 1, 2009
  • pp: 1018–1021

Coherent combining of tunable erbium-doped fiber lasers by a single-mode fiber feedback loop

Bing Lei and Ying Feng  »View Author Affiliations

Chinese Optics Letters, Vol. 7, Issue 11, pp. 1018-1021 (2009)

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We experimentally demonstrate the coherent combining of two tunable erbium-doped fiber lasers by using a single-mode fiber feedback loop configuration. A single-mode fiber is arranged in the feedback loop to filter the far-field pattern, and the energy of desired in-phase mode is collected and injected into the resonators of two component fiber lasers. The coherently combined laser is tunable over a wide spectrum ranging from 1536 to 1569 nm, which means that the combining scheme is compatible with wavelength tuning. The effects and necessity of whether adopting polarization controlling measures or not in component lasers are investigated in detail. The results indicate that adding polarization controlling can improve the array's coherence, whereas it will decrease the output power and efficiency simultaneously.

© 2009 Chinese Optics Letters

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(070.6110) Fourier optics and signal processing : Spatial filtering
(140.3290) Lasers and laser optics : Laser arrays
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3600) Lasers and laser optics : Lasers, tunable

Bing Lei and Ying Feng, "Coherent combining of tunable erbium-doped fiber lasers by a single-mode fiber feedback loop," Chin. Opt. Lett. 7, 1018-1021 (2009)

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