Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation.
Appl Opt
; 53(19): 4123-7, 2014 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-25089969
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.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Appl Opt
Ano de publicação:
2014
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Article