Abstract

We demonstrate a core-pumped Q-switched thulium-doped fiber laser system with fast tunability capability over 100 nm without any movable part. With up to 7 kW peak power in a diffraction-limited beam, this source is well adapted for pumping a frequency agile mid-IR parametric oscillator or amplifier based on Quasi-Phase-Match single-period crystals.

© 2015 Optical Society of America

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References

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    [Crossref]
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    [Crossref]
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2013 (1)

2011 (2)

2010 (1)

2004 (1)

Alam, S. U.

Becouarn, L.

Bennetts, S.

Bloom, G.

Carras, M.

Fejer, M. M.

Geng, J.

Gerard, B.

Grisard, A.

Harris, J. S.

Haub, J.

Heidt, A. M.

Hemming, A.

Hsu, K.

Jiang, S.

Jung, Y.

Kuo, P. S.

Lallier, E.

Larat, C.

Levi, O.

Li, Z.

Marcadet, X.

Pinguet, T. J.

Richardson, D. J.

Simakov, N.

Vodopyanov, K. L.

Wang, J.

Wang, Q.

Opt. Express (1)

Opt. Lett. (4)

Other (4)

J. Liu, K. Liu, H. Shi, Y. Hou, Y. Jiang, and P. Wang, “High-power Single-frequency, Single-polarization, Thulium-doped all-fiber MOPA,” in Proceedings of CLEO: 2014, OSA Technical Digest (online) (Optical Society of America, 2014), paper SW3N.1.

J. M. O. Daniel, M. Tokurakawa, and W. A. Clarkson, “Power-scalable wavelength-agile fibre laser source at two-microns,” presented at the 5th EPS-QEOD Europhoton Conference, Stockholm, Sweden, 26 - 31 Aug 2012.

J. M. O. Daniel and W. A. Clarkson, “Bandwidth-Controllable Tunable Q-Switched Thulium Fibre Laser,” in 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference, (Optical Society of America, 2013), paper CJ_10_2.
[Crossref]

F. Gutty, A. Grisard, A. Joly, C. Larat, D. Papillon-Ruggeri, and E. Lallier, “kW-level tunable Q-switched thulium-doped fiber system,” presented at the Advanced Solid State Laser Conference, Shanghai, China, 16 - 21 Nov 2014, poster ATu2A.40.
[Crossref]

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Figures (12)

Fig. 1
Fig. 1 Description of the fiber laser set-up.
Fig. 2
Fig. 2 Description of the two versions of the fiber amplification stage.
Fig. 3
Fig. 3 Output characteristics of the laser oscillator with the external cavity feedback aligned on the zeroth diffraction order of the AOM. (a) Laser energy and pulse width vs. emitted wavelength. (b) Temporal profile at 1930 nm, rep. rate of 5 kHz and pump of 0.7 W.
Fig. 4
Fig. 4 Laser output spectrum at a 5 kHz repetition rate with the external cavity feedback aligned on the zeroth diffraction order of the AOM.
Fig. 5
Fig. 5 Output characteristics of the laser oscillator with the external cavity feedback aligned on the first diffraction order of the AOM. (a) Laser energy and pulse width vs. emitted wavelength. (b) Temporal profile at 1925 nm, rep. rate of 2 kHz and pump of 0.8 W.
Fig. 6
Fig. 6 Laser output spectrum at a 5 kHz repetition rate with the external cavity feedback aligned on the first diffraction order of the AOM.
Fig. 7
Fig. 7 Impact of the pulse repetition rate and emission wavelength on the output peak power of the version “A” of the amplification stage.
Fig. 8
Fig. 8 Output characteristics of the version “A” of the amplification stage at the oscillator optimal repetition rate (2 kHz). (a) Peak power and pulse width vs. emitted wavelength. (b) Temporal profile at 1925 nm, oscillator pump of 0.8 W and amplifier pump of 2.2 W
Fig. 9
Fig. 9 Output spectrum of the version “A” of amplifier for 2.2 W pump with laser tuned at 1930 nm (blue), or 1960 nm (red), 2 kHz. To avoid superposition of the ASE contribution centered at 1865 nm, the red curve is shifted by −3dB.
Fig. 10
Fig. 10 Impact of the pulse repetition rate and emission wavelength on the output peak power of the version “B” of the amplification stage.
Fig. 11
Fig. 11 Output spectrum of the amplifier version “B” for 6.2 W pump with laser tuned at 1900 nm, 2 kHz. Inset a zoom of the main peak in a 20 nm span.
Fig. 12
Fig. 12 Amplifier version “B” signal beam quality measurements (see text) for 5.4 W amplifier pump and with laser tuned at 1930 nm, 10 kHz (x: horizontal-axis; + : vertical-axis; dashed curves: fits).

Tables (1)

Tables Icon

Table 1 Output characteristics of amplifier version “B” for 6.2 W pump and maximum output peak power

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