Generation of 131 fs mode-locked pulses from 2.8 μm Er:ZBLAN fiber laser

Hongan Gu; Zhipeng Qin; Guoqiang Xie; Ting Hai; Peng Yuan; Jingui Ma; Liejia Qian

doi:10.3788/COL202018.031402

Journals >Chinese Optics Letters >Volume 18 >Issue 3 >Page 031402 > Article

Chinese Optics Letters
Vol. 18, Issue 3, 031402 (2020)

Generation of 131 fs mode-locked pulses from 2.8 μm Er:ZBLAN fiber laser | Editors' Pick

Hongan Gu, Zhipeng Qin, Guoqiang Xie^*, Ting Hai, Peng Yuan, Jingui Ma, and Liejia Qian

Author Affiliations

School of Physics and Astronomy, Key Laboratory for Laser Plasmas (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China

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DOI: 10.3788/COL202018.031402 Cite this Article Set citation alerts

Hongan Gu, Zhipeng Qin, Guoqiang Xie, Ting Hai, Peng Yuan, Jingui Ma, Liejia Qian. Generation of 131 fs mode-locked pulses from 2.8 μm Er:ZBLAN fiber laser[J]. Chinese Optics Letters, 2020, 18(3): 031402 Copy Citation Text

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Experimental setup of an NPR mode-locked Er:ZBLAN fiber laser. LD, laser diode; L1, plano-convex lens (f=10 mm); L2 and L3, aspheric ZnSe lenses (f=12.7 mm); DM, dichroic mirror; Ge, germanium plate; OC, output coupler (T=40%); λ/2, half-wave plate; λ/4, quarter-wave plate; ISO, polarization-dependent optical isolator.

Fig. 1. Experimental setup of an NPR mode-locked Er:ZBLAN fiber laser. LD, laser diode;

L_{1}

, plano-convex lens (

f = 10 mm

);

L_{2}

and

L_{3}

, aspheric ZnSe lenses (

f = 12.7 mm

); DM, dichroic mirror; Ge, germanium plate; OC, output coupler (

T = 40 %

);

λ / 2

, half-wave plate;

λ / 4

, quarter-wave plate; ISO, polarization-dependent optical isolator.

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(a) Measured mode-locked pulse trains using a 1.61 m Er:ZBLAN fiber. (b) Fundamental beat RF spectrum. Inset: harmonic beats RF spectrum. RBW, resolution bandwidth.

Fig. 2. (a) Measured mode-locked pulse trains using a 1.61 m Er:ZBLAN fiber. (b) Fundamental beat RF spectrum. Inset: harmonic beats RF spectrum. RBW, resolution bandwidth.

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Fig. 3. (a)–(c) Pulse durations and (d)–(f) spectra obtained from mode-locked Er:ZBLAN fiber lasers with different gain fiber lengths of 2.47 m, 1.92 m, and 1.61 m, respectively.

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Fig. 4. Measurement results of beam quality.

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Fig. 5. (a) Calculated pulse profile and (b) spectrum with a fiber length of 1.6 m. (c) Pulse duration variation with the length of Er:ZBLAN gain fiber.

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