Dual-wavelength bidirectional pumped high-power Raman fiber laser

Zehui Wang; Qirong Xiao; Yusheng Huang; Jiading Tian; Dan Li; Ping Yan; Mali Gong

doi:doi:10.1017/hpl.2018.67

High Power Laser Science and Engineering, 2019, 7 (1): 010000e5, Published Online: Mar. 26, 2019

Dual-wavelength bidirectional pumped high-power Raman fiber laser Download： 617次

Zehui Wang Qirong Xiao Yusheng Huang Jiading Tian Dan Li Ping Yan Mali Gong

Author Affiliations

State Key Laboratory of Precision Measurement Technology and Instruments & Key Laboratory of Photonics Control Technology of the Ministry of Education, Tsinghua University, Beijing 100084, China

Figures & Tables

Fig. 1. Experimental setup of the Raman laser. PM: power meter, OSA: optical spectrum analyzer, CLS: cladding light stripper, YDFL:Yb-doped fiber laser.

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Fig. 2. Forward and backward output power as a function of pump power (only forward pumping in part I and both forward and backward pumping in part II).

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Fig. 3. (a) Forward spectrum and (b) backward spectrum. The red and blue lines represent the numerical simulation and experimental results, respectively.

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Fig. 4. $M^{2}$ factor of output laser.

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Fig. 5. Raman gain spectrum in a $25/400~\unicode[STIX]{x03BC}\text{m}$ gain fiber.

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Fig. 6. (a) Calculated power distributions of the (a) pump laser, signal laser and Raman laser along the fiber in the multi-frequency model ($L=60$ m), and (b) backward Raman laser in the dotted box in (a).

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Fig. 7. Transmission and amplification of Raman laser from 40 to 60 m (SRS has not been generated from 0 to 40 m).

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Fig. 8. Temperature distribution at the input end of two situations. (a) The experiment; (b) only 976 nm LDs were used.

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Fig. 9. Output spectra under different powers (the length of YDF is 60 m).

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Fig. 10. Exponential of gain coefficient versus wavelength (the length of YDF is 60 m).

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Fig. 11. Generation of the new laser wavelength (the forward pump power is 1800 W).

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Fig. 12. Experimental setup when the GDF is spliced after the YDF.

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Fig. 13. Output spectra and total power ($P$) at different lengths (LG) of splicing GDF: LG, $P$ are (a) 50 m, 3900 W, (b) 70 m, 3610 W, (c) 80 m, 3300 W and (d) 100 m, 2440 W, respectively.

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Table1. Parameters for the numerical calculations.

Parameter	Value
$\unicode[STIX]{x1D70E}_{a}$	Ref. [26]
$\unicode[STIX]{x1D70E}_{e}$	Ref. [26]
$\unicode[STIX]{x1D6E4}_{s}$	0.8^[27]
$\unicode[STIX]{x1D6E4}_{p}$	0.05 (20/400), 0.0625 (25/400)^[27]
$\unicode[STIX]{x1D6E4}_{r1},\unicode[STIX]{x1D6E4}_{r2},\unicode[STIX]{x1D6E4}_{\text{ase}}$	0.8
$c$	$2.9979\times 10^{8}$ m/s
$h$	$6.626\times 10^{-34}~\text{J}\cdot \text{s}$
$\unicode[STIX]{x1D70F}$	0.82 ms

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Zehui Wang, Qirong Xiao, Yusheng Huang, Jiading Tian, Dan Li, Ping Yan, Mali Gong. Dual-wavelength bidirectional pumped high-power Raman fiber laser[J]. High Power Laser Science and Engineering, 2019, 7(1): 010000e5.

Dual-wavelength bidirectional pumped high-power Raman fiber laser Download： 617次

Fig. 1. Experimental setup of the Raman laser. PM: power meter, OSA: optical spectrum analyzer, CLS: cladding light stripper, YDFL:Yb-doped fiber laser.

Fig. 2. Forward and backward output power as a function of pump power (only forward pumping in part I and both forward and backward pumping in part II).

Fig. 3. (a) Forward spectrum and (b) backward spectrum. The red and blue lines represent the numerical simulation and experimental results, respectively.

Fig. 4. $M^{2}$ factor of output laser.

Fig. 5. Raman gain spectrum in a $25/400~\unicode[STIX]{x03BC}\text{m}$ gain fiber.

Fig. 6. (a) Calculated power distributions of the (a) pump laser, signal laser and Raman laser along the fiber in the multi-frequency model ($L=60$ m), and (b) backward Raman laser in the dotted box in (a).

Fig. 7. Transmission and amplification of Raman laser from 40 to 60 m (SRS has not been generated from 0 to 40 m).

Fig. 8. Temperature distribution at the input end of two situations. (a) The experiment; (b) only 976 nm LDs were used.

Fig. 9. Output spectra under different powers (the length of YDF is 60 m).

Fig. 10. Exponential of gain coefficient versus wavelength (the length of YDF is 60 m).

Fig. 11. Generation of the new laser wavelength (the forward pump power is 1800 W).

Fig. 12. Experimental setup when the GDF is spliced after the YDF.

Fig. 13. Output spectra and total power ($P$) at different lengths (LG) of splicing GDF: LG, $P$ are (a) 50 m, 3900 W, (b) 70 m, 3610 W, (c) 80 m, 3300 W and (d) 100 m, 2440 W, respectively.

Table1. Parameters for the numerical calculations.

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Dual-wavelength bidirectional pumped high-power Raman fiber laser Download： 617次

Fig. 1. Experimental setup of the Raman laser. PM: power meter, OSA: optical spectrum analyzer, CLS: cladding light stripper, YDFL:Yb-doped fiber laser.

Fig. 2. Forward and backward output power as a function of pump power (only forward pumping in part I and both forward and backward pumping in part II).

Fig. 3. (a) Forward spectrum and (b) backward spectrum. The red and blue lines represent the numerical simulation and experimental results, respectively.

Fig. 4. $M^{2}$ factor of output laser.

Fig. 5. Raman gain spectrum in a $25/400~\unicode[STIX]{x03BC}\text{m}$ gain fiber.

Fig. 6. (a) Calculated power distributions of the (a) pump laser, signal laser and Raman laser along the fiber in the multi-frequency model ($L=60$ m), and (b) backward Raman laser in the dotted box in (a).

Fig. 7. Transmission and amplification of Raman laser from 40 to 60 m (SRS has not been generated from 0 to 40 m).

Fig. 8. Temperature distribution at the input end of two situations. (a) The experiment; (b) only 976 nm LDs were used.

Fig. 9. Output spectra under different powers (the length of YDF is 60 m).

Fig. 10. Exponential of gain coefficient versus wavelength (the length of YDF is 60 m).

Fig. 11. Generation of the new laser wavelength (the forward pump power is 1800 W).

Fig. 12. Experimental setup when the GDF is spliced after the YDF.

Fig. 13. Output spectra and total power ($P$) at different lengths (LG) of splicing GDF: LG, $P$ are (a) 50 m, 3900 W, (b) 70 m, 3610 W, (c) 80 m, 3300 W and (d) 100 m, 2440 W, respectively.

Table1. Parameters for the numerical calculations.

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