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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 19 — Jul. 1, 2014
  • pp: 4123–4127

Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation

H. Ahmad, N. F. Razak, M. Z. Zulkifli, F. D. Muhammad, Y. Munajat, and S. W. Harun  »View Author Affiliations

Applied Optics, Vol. 53, Issue 19, pp. 4123-4127 (2014)

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A dual-wavelength (DW) fiber laser with a closely spaced single longitudinal mode (SLM) output is proposed and demonstrated. The proposed fiber laser utilizes a conventional fiber Bragg grating with a center wavelength of about 1546.8 nm in conjunction with an ultranarrow bandwidth tunable optical filter to generate the desired DW SLM output. Observations with a very high resolution optical spectrum analyzer, which was capable of achieving resolutions up to 0.16 pm, revealed detailed spectral characteristics not characteristically seen before. A channel spacing of up to 58 nm was realized, and spacing as small as 2 pm was achieved. The minimum channel spacing and its resulting beat frequency are the narrowest observed yet to the best of our knowledge for a DW fiber laser at room temperature.

© 2014 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2410) Fiber optics and optical communications : Fibers, erbium
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.5625) Fiber optics and optical communications : Radio frequency photonics
(060.2840) Fiber optics and optical communications : Heterodyne

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 17, 2014
Revised Manuscript: May 17, 2014
Manuscript Accepted: May 18, 2014
Published: June 23, 2014

H. Ahmad, N. F. Razak, M. Z. Zulkifli, F. D. Muhammad, Y. Munajat, and S. W. Harun, "Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation," Appl. Opt. 53, 4123-4127 (2014)

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