Temporal compressions of optical pulses and pulse trains have been performed by the photon-echo process in Tm-doped YAG at 793 nm. Single-pulse temporal compression by almost a factor of 500 from 10 µs to 22 ns and pulse train compression by a factor of 14 from 5 µs to 350 ns with a high-speed frequency-tunable external-cavity diode laser are demonstrated. It is suspected that significantly higher compression could be obtained by improved control of the laser frequency and laser frequency chirps. Theoretically, Tm-doped YAG should be capable of compressing single pulses by almost a factor of 107.

© 2000 Optical Society of America

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B. H. Kolner, IEEE J. Quantum Electron. 30, 1951 (1994).



Altner, S. B.

Bai, Y. S.

Boggs, B.

Elman, U.

Graf, F. R.

Greiner, C.

Kolner, B. H.

B. H. Kolner, IEEE J. Quantum Electron. 30, 1951 (1994).

Kröll, S.

Le Gouët, J.-L.

Leaird, D. E.

Lin, H.

Lorgeré, I.

Maniloff, E. S.

Ménager, L.

Mohan, R. Krishna

Mossberg, T. W.

Oudin, S.

Plagemann, B. H.

Reitze, D. H.

Renn, A.

Tian, M.

Tidlund, P.

Wang, T.

Weiner, A. M.

Wild, U. P.

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Figures (2)

Fig. 1
Fig. 1

a, Input intensity and b, frequency as functions of time for single-pulse compression. The excitation pulses are centered about times t1 and t2. ω0 is the center frequency of the frequency chirp. The echo occurs at the times indicated by the vertical lines. In c and d the input parameters are shown for multibit compression. ω0j is the center frequency for input bit j.

Fig. 2
Fig. 2

a, Single-pulse compression of a 10µs input pulse by a factor of 450 to a full width at half-maximum of 22 ns. Inset, the echo output on an expanded time scale. b, Solid curve, compressed echo output for a 3-bit input sequence; dashed curve, theoretical simulation based on relation (4) (details are given in text).

Equations (4)

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Eetω0-ωch/2ω0+ωch/2 expiωtdω=expiω0tωch×sincωch2t,
Etott=jEjtωchb sincωchb2tj expiω0jt.
Itωchb2 sinc2ωchb2tsin2Nbωchb2TbTStsin2ωchb2TbTSt.