Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles

Dong Mao; Xiaoqi Cui; Wending Zhang; Mingkun Li; Tianxian Feng; Bobo Du; Hua Lu; Jianlin Zhao

doi:doi:10.1364/PRJ.5.000052

Photonics Research, 2017, 5 (1): 01000052, Published Online: Feb. 8, 2017

Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles Download： 976次

Dong Mao ^*Xiaoqi Cui Wending Zhang Mingkun Li Tianxian Feng Bobo Du Hua Lu Jianlin Zhao

Author Affiliations

MOE Key Laboratory of Space Applied Physics and Chemistry, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China

Figures & Tables

Fig. 1. (a) Scanning electron microscope image of Fe3O4 nanoparticles; the inset shows the suspension of the nanoparticles. (b) Atomic force microscope image. (c) Schematic diagram of preparing two filmy Fe3O4 SAs.

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Fig. 2. Side profiles of (a) Fe3O4-PVA film and (b) Fe3O4-PI film. Linear absorptions of (c) Fe3O4-PVA film and PVA film and (d) Fe3O4-PI film and PI film. Nonlinear absorption of (e) Fe3O4-PVA film and (f) Fe3O4-PI film in comparison with PVA film and PI film.

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Fig. 3. Experimental setup of the Q-switched fiber laser. LD, laser diode; PI-ISO, polarization-independent isolator. The SA is based on Fe3O4-PI film or Fe3O4-PVA film.

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Fig. 4. (a) Spectra of a continuous-wave laser and a Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PVA film.

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Fig. 5. (a) Spectrum of the Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PI film.

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Fig. 6. Long-term stability of the Q-switched pulses at pump power of 50 mW. (a) and (b) are optical spectra based on Fe3O4-PVA SA and Fe3O4-PI SA, respectively. (c) Repetition rate and (d) output power.

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Table1. Comparison of Two SAs and the Laser Performance

SA	Modulation Depth	Linear Transmission	Pump Power of $Q$ -switched Operation	Repetition Rate	Pulse Duration
${Fe}_{3} O_{4}$ -PVA	0.8%	45.4%	23–150 mW	8.5–28 kHz	23.5–6 μs
${Fe}_{3} O_{4}$ -PI	4.1%	38.8%	25–650 mW	5.5–49 kHz	47–3.5 μs

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Dong Mao, Xiaoqi Cui, Wending Zhang, Mingkun Li, Tianxian Feng, Bobo Du, Hua Lu, Jianlin Zhao. Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles[J]. Photonics Research, 2017, 5(1): 01000052.

Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles Download： 976次

Fig. 1. (a) Scanning electron microscope image of Fe3O4 nanoparticles; the inset shows the suspension of the nanoparticles. (b) Atomic force microscope image. (c) Schematic diagram of preparing two filmy Fe3O4 SAs.

Fig. 2. Side profiles of (a) Fe3O4-PVA film and (b) Fe3O4-PI film. Linear absorptions of (c) Fe3O4-PVA film and PVA film and (d) Fe3O4-PI film and PI film. Nonlinear absorption of (e) Fe3O4-PVA film and (f) Fe3O4-PI film in comparison with PVA film and PI film.

Fig. 3. Experimental setup of the Q-switched fiber laser. LD, laser diode; PI-ISO, polarization-independent isolator. The SA is based on Fe3O4-PI film or Fe3O4-PVA film.

Fig. 4. (a) Spectra of a continuous-wave laser and a Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PVA film.

Fig. 5. (a) Spectrum of the Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PI film.

Fig. 6. Long-term stability of the Q-switched pulses at pump power of 50 mW. (a) and (b) are optical spectra based on Fe3O4-PVA SA and Fe3O4-PI SA, respectively. (c) Repetition rate and (d) output power.

Table1. Comparison of Two SAs and the Laser Performance

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Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles Download： 976次

Fig. 1. (a) Scanning electron microscope image of Fe3O4 nanoparticles; the inset shows the suspension of the nanoparticles. (b) Atomic force microscope image. (c) Schematic diagram of preparing two filmy Fe3O4 SAs.

Fig. 2. Side profiles of (a) Fe3O4-PVA film and (b) Fe3O4-PI film. Linear absorptions of (c) Fe3O4-PVA film and PVA film and (d) Fe3O4-PI film and PI film. Nonlinear absorption of (e) Fe3O4-PVA film and (f) Fe3O4-PI film in comparison with PVA film and PI film.

Fig. 3. Experimental setup of the Q-switched fiber laser. LD, laser diode; PI-ISO, polarization-independent isolator. The SA is based on Fe3O4-PI film or Fe3O4-PVA film.

Fig. 4. (a) Spectra of a continuous-wave laser and a Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PVA film.

Fig. 5. (a) Spectrum of the Q-switched laser. Inset: radio frequency spectrum. (b) Pulse train. Inset: pulse profile. (c) Repetition rate, pulse duration, (d) output power, and pulse energy versus pump power. The SA is based on the Fe3O4-PI film.

Fig. 6. Long-term stability of the Q-switched pulses at pump power of 50 mW. (a) and (b) are optical spectra based on Fe3O4-PVA SA and Fe3O4-PI SA, respectively. (c) Repetition rate and (d) output power.

Table1. Comparison of Two SAs and the Laser Performance

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