Switchable dual-wavelength Q-switched fiber laser using multilayer black phosphorus as a saturable absorber

Junmin Liu; Yu Chen; Ying Li; Han Zhang; Shuiqin Zheng; Shixiang Xu

doi:10.1364/PRJ.6.000198

Journals >Photonics Research >Volume 6 >Issue 3 >Page 198 > Article

Photonics Research
Vol. 6, Issue 3, 198 (2018)

Switchable dual-wavelength Q-switched fiber laser using multilayer black phosphorus as a saturable absorber

Junmin Liu^1、2、†, Yu Chen^2、†, Ying Li², Han Zhang², Shuiqin Zheng^1、2, and Shixiang Xu^1、*

Author Affiliations

¹Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China

²International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

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DOI: 10.1364/PRJ.6.000198 Cite this Article Set citation alerts

Junmin Liu, Yu Chen, Ying Li, Han Zhang, Shuiqin Zheng, Shixiang Xu. Switchable dual-wavelength Q-switched fiber laser using multilayer black phosphorus as a saturable absorber[J]. Photonics Research, 2018, 6(3): 198 Copy Citation Text

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Optical images of (a) bare microfiber and (b) microfiber coated with BP flakes, (c) experimental setup of the balanced twin-detector measurement device, (d) the measured saturable absorption and its corresponding fitting curve.

Fig. 1. Optical images of (a) bare microfiber and (b) microfiber coated with BP flakes, (c) experimental setup of the balanced twin-detector measurement device, (d) the measured saturable absorption and its corresponding fitting curve.

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Schematic of the BP-based Q-switched fiber ring laser. LD, laser diode; WDM, wavelength division multiplexer; OC, optical coupler; EDF, Er-doped fiber; FBG, fiber Bragg grating; PC, polarization controller.

Fig. 2. Schematic of the BP-based Q-switched fiber ring laser. LD, laser diode; WDM, wavelength division multiplexer; OC, optical coupler; EDF, Er-doped fiber; FBG, fiber Bragg grating; PC, polarization controller.

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Fig. 3. Dual-wavelength Q-switched operation when the pump power is 95 mW. (a) Output optical spectrum of the dual-wavelength Q-switched fiber laser, (b) typical Q-switched pulse train, (c) single pulse envelope, (d) the RF spectrum.

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Fig. 4. (a) Average output power and pulse energy versus pump power, (b) the pulse repetition rate and duration versus pump power.

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Fig. 5. Output spectra of dual-wavelength Q-switched operation taken at a 10 min interval over 1 h.

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Fig. 6. Q-switched operation at a wavelength of 1542.4 nm filtered from dual-wavelength output. (a) Output optical spectrum, (b) typical Q-switched pulse train, (c) single pulse envelope, (d) the RF spectrum.

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Fig. 7. Q-switched operation at a wavelength of 1543.2 nm filtered from dual-wavelength output. (a) Output optical spectrum, (b) typical Q-switched pulse train, (c) single pulse envelope, (d) the RF spectrum.

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Fig. 8. Dual-wavelength Q-switched operation. (a) The average output power, (b) pulse energy, (c) pulse duration, and (d) repetition rate at the wavelengths 1542.4 nm and 1543.2 nm versus pump power.

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Fig. 9. Q-switched operation at a single wavelength of 1542.4 nm. (a) Output optical spectrum, (b) typical Q-switched pulse train, (c) single pulse envelope, (d) the RF spectrum.

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Fig. 10. Q-switched operation at a single wavelength of 1543.2 nm. (a) Output optical spectrum, (b) typical Q-switched pulse train, (c) single pulse envelope, (d) the RF spectrum.

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Fig. 11. Single-wavelength Q-switched operation. (a) The average output power, (b) pulse energy, (c) pulse duration, and (d) repetition rate at the wavelengths 1542.4 nm and 1543.2 nm versus pump power.

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