Abstract

We show that an enhancement cavity seeded at the full repetition rate of the pump laser can automatically reshape small-signal gain across the interacting pulses in an optical parametric chirped-pulse amplifier for close-to-optimal operation, significantly increasing both the gain bandwidth and the conversion efficiency, in addition to boosting gain for high-repetition-rate amplification. Applied to a degenerate amplifier, the technique can provide an octave-spanning gain bandwidth.

© 2010 Optical Society of America

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References

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  1. G. Cerullo and S. De Silvestri, Rev. Sci. Instrum. 74, 1 (2003).
    [CrossRef]
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    [CrossRef] [PubMed]
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  9. Phase-matching bandwidth is calculated as FWHM of G(ω), Eq. , with fixed intensity corresponding to the peak intensity of the single pass case and Δk(ω) calculated from the Sellmeier equations.
  10. J. Moses, S.-W. Huang, K.-H. Hong, O. D. Mücke, E. L. Falcão-Filho, A. Benedick, F. Ö. Ilday, A. Dergachev, J. A. Bolger, B. J. Eggleton, and F. X. Kärtner, Opt. Lett. 34, 1639 (2009).
    [CrossRef] [PubMed]

2010

2009

2008

2006

2003

G. Cerullo and S. De Silvestri, Rev. Sci. Instrum. 74, 1 (2003).
[CrossRef]

2002

1994

Andersen, T. V.

Benedick, A.

Bolger, J. A.

Cerullo, G.

De Silvestri, S.

G. Cerullo and S. De Silvestri, Rev. Sci. Instrum. 74, 1 (2003).
[CrossRef]

Dergachev, A.

Eggleton, B. J.

Eidam, T.

Falcão-Filho, E. L.

Fan, T. Y.

Gabler, T.

Gopinath, J.

Hanf, S.

Hong, K.-H.

Huang, S.-W.

Hybl, J.

Ilday, F. Ö.

Kärtner, F. X.

Limpert, J.

Manzoni, C.

Matousek, P.

Moses, J.

Mücke, O. D.

New, G. H. C.

Osvay, K.

Ross, I. N.

Schreiber, T.

Seise, E.

Siddiqui, A.

K.-H. Hong, A. Siddiqui, J. Moses, J. Gopinath, J. Hybl, F. Ö. Ilday, T. Y. Fan, and F. X. Kärtner, Opt. Lett. 33, 2473 (2008).
[CrossRef] [PubMed]

J. Moses, S.-W. Huang, A. Siddiqui, and F. X. Kärtner, presented at First European Optical Society Topical Meeting on Lasers, Capri, Italy, September 27–30, 2009.

Tünnermann, A.

Wirth, C.

Wise, F. W.

Yanovsky, V.

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Figures (3)

Fig. 1
Fig. 1

Conceptual diagram of the C-OPCPA scheme.

Fig. 2
Fig. 2

Simulated C-OPCPA with a 10 W , 6 ps , transform-limited pump pulse train at 1037 nm and a 2 μW , 6 ps , chirped signal pulse train at 1550 nm with 100 nm bandwidth, which mix in a 5-mm-long PPLN crystal at 80 MHz repetition rate. For comparison, optimized single-pass OPCPA is simulated with identical parameters except for a higher, 50 W pump power. Cavity parameters are T = 10 % and L linear = 1 % (a) Intensity profiles of seed (multiplied by 10 7 ) and pump in single-pass case and incident, intracavity, and reflected pump pulses in cavity-enhanced case. (b) Fractional conversion efficiency (conversion of incident pump to signal plus idler) versus time for the single-pass case compared to the cavity-enhanced case. Fractional intracavity conversion and output coupling minus linear loss are also shown.

Fig. 3
Fig. 3

C-OPCPA, pumped at 1.03 μm , seeded around the degeneracy point with bandwidth covering 1.4 to 3.5 μm , and phase matched at 1.55 μm . Input coupler T = 10 % . Shown: wave-vector mismatch, amplified signal, phase-matching bandwidth (PMBW) when phase matched at 1.55 μm (dotted curve), and phase-matching bandwidth when phase matched at 2.06 μm (short dashed curve).

Equations (2)

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P intra cavity = T × P o ( 1 R × ( 1 L ) ) 2 , P reflected = | R ( 1 L ) × T 1 R ( 1 L ) | 2 × P 0 ,
G ( t ) 1 4 exp ( 2 g ( t ) l ) = 1 4 exp ( 2 l Γ ( t ) 2 ( Δ k ( t ) / 2 ) 2 ) ,

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