Abstract

A Tm–Ho:fiber amplifier based on single-clad geometry is demonstrated for the generation of high-power femtosecond pulses around 1.9 μm. The amplifier is seeded by the low-power Raman soliton generated by an Er:fiber femtosecond laser. Pulse trains at a repetition rate of 250 MHz tunable from 1.84 to 1.92 μm with corresponding powers from 2.6 to 3 W and durations from 80 to 105 fs have been obtained. Beating with a single-frequency Tm laser has shown that the pulse coherence is highly preserved. The overall power fluctuations have been measured to be as low as 0.6%.

© 2013 Optical Society of America

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References

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2013 (1)

2012 (4)

2011 (1)

2008 (1)

2006 (1)

2005 (1)

Adler, F.

Bliss, D.

Brida, D.

Byer, R. L.

Cassinerio, M.

Coluccelli, N.

Demirbas, U.

di Lieto, A.

Diddams, S. A.

Engelbrecht, M.

Fehrenbacher, D.

Fejer, M. M.

Fermann, M.

N. Leindecker, A. Marandi, R. L. Byer, K. L. Vodopyanov, J. Jiang, I. Hartl, M. Fermann, and P. G. Schunemann, Opt. Express 20, 7046 (2012).
[CrossRef]

G. Imeshev and M. Fermann, Opt. Express 13, 7424 (2005).
[CrossRef]

J. Jiang, A. Ruehl, I. Hartl, and M. Fermann, in CLEO/Europe and EQEC 2011 Conference Digest, OSA Technical Digest (Optical Society of America, 2011), paper CF2_4.

Fermann, M. E.

Galzerano, G.

Gambetta, A.

Gatti, D.

Harris, J. S.

Hartl, I.

Haxsen, F.

Imeshev, G.

Jiang, J.

Kracht, D.

Krauss, G.

Kumkar, S.

Langrock, C.

Laporta, P.

Leindecker, N.

Leitenstorfer, A.

Lin, A. C.

Lynch, C.

Marandi, A.

Marangoni, M.

Mohr, C.

Phillips, C. R.

Ruehl, A.

M. Engelbrecht, F. Haxsen, A. Ruehl, D. Wandt, and D. Kracht, Opt. Lett. 33, 690 (2008).
[CrossRef]

J. Jiang, A. Ruehl, I. Hartl, and M. Fermann, in CLEO/Europe and EQEC 2011 Conference Digest, OSA Technical Digest (Optical Society of America, 2011), paper CF2_4.

Schunemann, P. G.

Snure, M.

Tonelli, M.

Vodopyanov, K. L.

Wandt, D.

Wunram, M.

Yu, X.

Zhu, M.

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Figures (5)

Fig. 1.
Fig. 1.

Schematic of laser based on Tm–Ho:fiber amplifier and pump system.

Fig. 2.
Fig. 2.

(a) Spectra of the pulse trains at the amplifier input (dashed line, not to scale) and output (solid line), and fluorescence of the Tm–Ho fiber (gray line). (b) Powers (triangle) and pulse durations (circles).

Fig. 3.
Fig. 3.

(a) Autocorrelations of the pulses at the output of the Tm–Ho:fiber amplifier before (blue line) and after (green line) compression down to 80 fs by the silicon prism pair. (b) Output power of the Tm–Ho amplifier (triangles) and corresponding gain (circles) as a function of the injected power.

Fig. 4.
Fig. 4.

RF spectrum of the beatnotes between a single-frequency Tm laser and the Raman soliton before (red line) and after (blue line) amplification. Inset: expanded view of the beatnotes.

Fig. 5.
Fig. 5.

(a) RIN of the pump (green line), Raman soliton before (red line) and (blue line) after amplification, (orange line) noise floor; and (b) corresponding integrated intensity noise (note that the pump noise has been divided by 10).

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