Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited]

Bo Guo; Xinyu Guo; Lige Tang; Wenlei Yang; Qiumei Chen; Zhongyao Ren

doi:doi:10.3788/COL202119.071405

Chinese Optics Letters, 2021, 19 (7): 071405, Published Online: Apr. 20, 2021

Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited] Download： 535次

Bo Guo ^*Xinyu Guo Lige Tang Wenlei Yang ^**Qiumei Chen Zhongyao Ren

Author Affiliations

Key Laboratory of In-fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin 150001, China

Figures & Tables

Fig. 1. Schematic diagram of the experimental setup for fabricating the ULPG sample. The green frame is the diagram of the ULPG sample and a micrograph of a fiber taper.

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Fig. 2. Typical optical characteristics and saturable absorption property of the as-used ULPG: (a) transmission spectrum (inset: the photograph when the yellow light is passing out); (b) nonlinear saturable absorption behavior.

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Fig. 3. Experimental setup. LD, laser diode; WDM, wavelength-division multiplexer; EDF, erbium-doped fiber; ISO, isolator; OC, optical coupler; SMF, single-mode fiber; PC, polarization controller; ULPG, ultra-long-period grating.

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Fig. 4. Three-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

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Fig. 5. Four-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

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Fig. 6. Multi-wavelength mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Four-, (b) five-, (c) six-wavelength, and (b) the corresponding pulse train.

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Fig. 7. Seven-wavelength mode-locking operation with a length of SMF of 20 m and a corresponding cavity dispersion of $\sim - 0.35 {ps}^{2}$ . (a) Optical spectrum, (b) the corresponding pulse train, and (c) long-term optical spectra measured at 2 h intervals over 14 h.

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Fig. 8. Seven-wavelength and hybrid soliton operation with a length of SMF of 135 m and a corresponding cavity dispersion of $\sim - 2.94 {ps}^{2}$ . (a), (c) The optical spectra and (b), (d) the corresponding pulse trains, respectively.

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Fig. 9. Average output power versus the pump power of the laser with different lengths of SMF.

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Fig. 10. Mode-locking principle of ULPG. CW, continuous wave.

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Bo Guo, Xinyu Guo, Lige Tang, Wenlei Yang, Qiumei Chen, Zhongyao Ren. Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited][J]. Chinese Optics Letters, 2021, 19(7): 071405.

Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited] Download： 535次

Fig. 1. Schematic diagram of the experimental setup for fabricating the ULPG sample. The green frame is the diagram of the ULPG sample and a micrograph of a fiber taper.

Fig. 2. Typical optical characteristics and saturable absorption property of the as-used ULPG: (a) transmission spectrum (inset: the photograph when the yellow light is passing out); (b) nonlinear saturable absorption behavior.

Fig. 3. Experimental setup. LD, laser diode; WDM, wavelength-division multiplexer; EDF, erbium-doped fiber; ISO, isolator; OC, optical coupler; SMF, single-mode fiber; PC, polarization controller; ULPG, ultra-long-period grating.

Fig. 4. Three-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 5. Four-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 6. Multi-wavelength mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Four-, (b) five-, (c) six-wavelength, and (b) the corresponding pulse train.

Fig. 7. Seven-wavelength mode-locking operation with a length of SMF of 20 m and a corresponding cavity dispersion of $\sim - 0.35 {ps}^{2}$ . (a) Optical spectrum, (b) the corresponding pulse train, and (c) long-term optical spectra measured at 2 h intervals over 14 h.

Fig. 8. Seven-wavelength and hybrid soliton operation with a length of SMF of 135 m and a corresponding cavity dispersion of $\sim - 2.94 {ps}^{2}$ . (a), (c) The optical spectra and (b), (d) the corresponding pulse trains, respectively.

Fig. 9. Average output power versus the pump power of the laser with different lengths of SMF.

Fig. 10. Mode-locking principle of ULPG. CW, continuous wave.

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Ultra-long-period grating-based multi-wavelength ultrafast fiber laser [Invited] Download： 535次

Fig. 1. Schematic diagram of the experimental setup for fabricating the ULPG sample. The green frame is the diagram of the ULPG sample and a micrograph of a fiber taper.

Fig. 2. Typical optical characteristics and saturable absorption property of the as-used ULPG: (a) transmission spectrum (inset: the photograph when the yellow light is passing out); (b) nonlinear saturable absorption behavior.

Fig. 3. Experimental setup. LD, laser diode; WDM, wavelength-division multiplexer; EDF, erbium-doped fiber; ISO, isolator; OC, optical coupler; SMF, single-mode fiber; PC, polarization controller; ULPG, ultra-long-period grating.

Fig. 4. Three-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of ∼−2.01 ps2. (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 5. Four-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of ∼−2.01 ps2. (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 6. Multi-wavelength mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of ∼−2.01 ps2. (a) Four-, (b) five-, (c) six-wavelength, and (b) the corresponding pulse train.

Fig. 7. Seven-wavelength mode-locking operation with a length of SMF of 20 m and a corresponding cavity dispersion of ∼−0.35 ps2. (a) Optical spectrum, (b) the corresponding pulse train, and (c) long-term optical spectra measured at 2 h intervals over 14 h.

Fig. 8. Seven-wavelength and hybrid soliton operation with a length of SMF of 135 m and a corresponding cavity dispersion of ∼−2.94 ps2. (a), (c) The optical spectra and (b), (d) the corresponding pulse trains, respectively.

Fig. 9. Average output power versus the pump power of the laser with different lengths of SMF.

Fig. 10. Mode-locking principle of ULPG. CW, continuous wave.

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Fig. 4. Three-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 5. Four-wavelength soliton mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Optical spectrum and (b) the corresponding pulse train (inset: the zoom-in image).

Fig. 6. Multi-wavelength mode-locking operation with a length of SMF of 93.5 m and a corresponding cavity dispersion of $\sim - 2.01 {ps}^{2}$ . (a) Four-, (b) five-, (c) six-wavelength, and (b) the corresponding pulse train.

Fig. 7. Seven-wavelength mode-locking operation with a length of SMF of 20 m and a corresponding cavity dispersion of $\sim - 0.35 {ps}^{2}$ . (a) Optical spectrum, (b) the corresponding pulse train, and (c) long-term optical spectra measured at 2 h intervals over 14 h.

Fig. 8. Seven-wavelength and hybrid soliton operation with a length of SMF of 135 m and a corresponding cavity dispersion of $\sim - 2.94 {ps}^{2}$ . (a), (c) The optical spectra and (b), (d) the corresponding pulse trains, respectively.