Random Bragg-grating-based wavelength-tunable random fiber laser with a full-open cavity

Bing Lü; Wentao Zhang; Wenzhu Huang; Fang Li

doi:10.3788/COL202119.091203

Journals >Chinese Optics Letters >Volume 19 >Issue 9 >Page 091203 > Article

Chinese Optics Letters
Vol. 19, Issue 9, 091203 (2021)

Random Bragg-grating-based wavelength-tunable random fiber laser with a full-open cavity

Bing Lü^1、2, Wentao Zhang^1、2、*, Wenzhu Huang^1、2, and Fang Li^1、2

Author Affiliations

¹College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China

²Optoelectronic System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

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DOI: 10.3788/COL202119.091203 Cite this Article Set citation alerts

Bing Lü, Wentao Zhang, Wenzhu Huang, Fang Li. Random Bragg-grating-based wavelength-tunable random fiber laser with a full-open cavity[J]. Chinese Optics Letters, 2021, 19(9): 091203 Copy Citation Text

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Abstract

A full-open-cavity wavelength-tunable random fiber laser (WT-RFL) with compact structure and hundreds of picometers tuning range is proposed and demonstrated. A

π

fiber Bragg grating (FBG) is used in the WT-RFL as a filter to select lasing wavelengths. The two random Bragg grating arrays (RBGAs) and a section of high gain erbium-doped fiber result in a low lasing threshold and high stability. A numerical model to analyze the tunable characteristics is developed. The results show that the laser threshold is 22 mW, and the maximum peak-power fluctuation is 0.55 dB. To the best of our knowledge, it is the first time that a compact and full-open-cavity WT-RFL with two RBGAs and a

π - FBG

is proposed.

Keywords

full-open cavity random Bragg grating array tunable random fiber laser

F_{i} = [\begin{matrix} \cosh (S L_{i}) - j \frac{δ \sinh (S L_{i})}{S} & - j \frac{κ \sinh (S L_{i})}{S} \\ j \frac{κ \sinh (S L_{i})}{S} & \cosh (S L) + j \frac{δ \sinh (S L_{i})}{S} \end{matrix}],

(1)

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M_{i} = [\begin{matrix} \exp (j K d_{i}) & 0 \\ 0 & \exp (- j K d_{i}) \end{matrix}],

(2)

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G = F_{1} M_{1} F_{2} M_{2} \cdot\cdot\cdot F_{i} M_{i} F_{i + 1} M_{i + 1} = (\begin{matrix} G_{11} & G_{12} \\ G_{21} & G_{22} \end{matrix}) .

(3)

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R_{RBGA} = {| \frac{G_{21}}{G_{22}} |}^{2} .

(4)

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A = (\begin{matrix} A_{11} & A_{12} \\ A_{21} & A_{22} \end{matrix}) .

(5)

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T_{π - FBG} = {| \frac{1}{A_{11}} |}^{2} .

(6)

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Bing Lü, Wentao Zhang, Wenzhu Huang, Fang Li. Random Bragg-grating-based wavelength-tunable random fiber laser with a full-open cavity[J]. Chinese Optics Letters, 2021, 19(9): 091203

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