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

H. Ahmad, Razak Nor Farhah, M. Z. Zulkifli, F. D. Muhammad, Y. Munajat, S. W. Harun

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)4123-4127
Number of pages5
JournalApplied Optics
Issue number19
DOIs
Publication statusPublished - 1 Jul 2014
Externally publishedYes

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Optical filters
optical filters
Fiber lasers
fiber lasers
radio frequencies
low frequencies
bandwidth
Bandwidth
Wavelength
spacing
wavelengths
Spectrum analyzers
beat frequencies
output
Fiber Bragg gratings
Laser modes
Bragg gratings
optical spectrum
analyzers
fibers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation. / Ahmad, H.; Nor Farhah, Razak; Zulkifli, M. Z.; Muhammad, F. D.; Munajat, Y.; Harun, S. W.

In: Applied Optics, No. 19, 01.07.2014, p. 4123-4127.

Research output: Contribution to journalArticle

Ahmad, H. ; Nor Farhah, Razak ; Zulkifli, M. Z. ; Muhammad, F. D. ; Munajat, Y. ; Harun, S. W. / Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation. In: Applied Optics. 2014 ; No. 19. pp. 4123-4127.
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