Abstract

We present a novel method for the generation of synchronized short pulses at high repetition rates from Er-doped silica fiber lasers. The method employs coupling of an optical pulse train to a passively mode-locked fiber laser. The injected signal repetition rate is slightly detuned from the modal spacing of the fiber laser, such that a subset of the latter modes is injection locked, yielding a high-repetition-rate pulse train. By injecting a 2-GHz train of relatively broad optical pulses at an average power of 100 μW, we achieved a train of 6-ps pulses at rates of 40 GHz from the harmonically locked fiber laser.

© 1995 Optical Society of America

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References

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  1. C. R. Doerr, H. A. Haus, E. P. Ippen, M. Shirasaki, K. Tamura, Opt. Lett. 16, 502 (1991), and references therein.
    [CrossRef]
  2. G. T. Harvey, L. F. Mollenauer, Opt. Lett. 18, 107 (1993)T. F. Carruthers, I. N. Dulling, M. L. Dennis, Electron. Lett. 30, 1051 (1994).
    [CrossRef] [PubMed]
  3. E. J. Greer, K. Smith, Electron. Lett. 28, 1741 (1992)B. P. Nelson, K. Smith, K. J. Blow, Electron. Lett. 28, 656 (1992).
    [CrossRef]
  4. M. Margalit, M. Orenstein, G. Eisenstein, V. Mikhaelshvili, Opt. Lett. 19, 2125 (1994).
    [CrossRef] [PubMed]
  5. H. A. Haus, Waves and Fields in Optoelectronics (Prentice-Hall, Englewood Cliffs, N.J., 1984), and references therein.
  6. H. A. Haus, J. G. Fugimoto, E. P. Ippen, J. Opt. Soc. Am. B 8, 2068 (1991).
    [CrossRef]
  7. M. Margalit, M. Orenstein, G. Eisenstein, in Digest of Integrated Optics and Optical Fiber Communications- 95 (Chinese Univ. Press, Hong Kong, 1995), paper ThA-14.

1994 (1)

1993 (1)

1992 (1)

E. J. Greer, K. Smith, Electron. Lett. 28, 1741 (1992)B. P. Nelson, K. Smith, K. J. Blow, Electron. Lett. 28, 656 (1992).
[CrossRef]

1991 (2)

Doerr, C. R.

Eisenstein, G.

M. Margalit, M. Orenstein, G. Eisenstein, V. Mikhaelshvili, Opt. Lett. 19, 2125 (1994).
[CrossRef] [PubMed]

M. Margalit, M. Orenstein, G. Eisenstein, in Digest of Integrated Optics and Optical Fiber Communications- 95 (Chinese Univ. Press, Hong Kong, 1995), paper ThA-14.

Fugimoto, J. G.

Greer, E. J.

E. J. Greer, K. Smith, Electron. Lett. 28, 1741 (1992)B. P. Nelson, K. Smith, K. J. Blow, Electron. Lett. 28, 656 (1992).
[CrossRef]

Harvey, G. T.

Haus, H. A.

Ippen, E. P.

Margalit, M.

M. Margalit, M. Orenstein, G. Eisenstein, V. Mikhaelshvili, Opt. Lett. 19, 2125 (1994).
[CrossRef] [PubMed]

M. Margalit, M. Orenstein, G. Eisenstein, in Digest of Integrated Optics and Optical Fiber Communications- 95 (Chinese Univ. Press, Hong Kong, 1995), paper ThA-14.

Mikhaelshvili, V.

Mollenauer, L. F.

Orenstein, M.

M. Margalit, M. Orenstein, G. Eisenstein, V. Mikhaelshvili, Opt. Lett. 19, 2125 (1994).
[CrossRef] [PubMed]

M. Margalit, M. Orenstein, G. Eisenstein, in Digest of Integrated Optics and Optical Fiber Communications- 95 (Chinese Univ. Press, Hong Kong, 1995), paper ThA-14.

Shirasaki, M.

Smith, K.

E. J. Greer, K. Smith, Electron. Lett. 28, 1741 (1992)B. P. Nelson, K. Smith, K. J. Blow, Electron. Lett. 28, 656 (1992).
[CrossRef]

Tamura, K.

Electron. Lett. (1)

E. J. Greer, K. Smith, Electron. Lett. 28, 1741 (1992)B. P. Nelson, K. Smith, K. J. Blow, Electron. Lett. 28, 656 (1992).
[CrossRef]

J. Opt. Soc. Am. B (1)

Opt. Lett. (3)

Other (2)

H. A. Haus, Waves and Fields in Optoelectronics (Prentice-Hall, Englewood Cliffs, N.J., 1984), and references therein.

M. Margalit, M. Orenstein, G. Eisenstein, in Digest of Integrated Optics and Optical Fiber Communications- 95 (Chinese Univ. Press, Hong Kong, 1995), paper ThA-14.

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Figures (5)

Fig. 1
Fig. 1

Spectral view of harmonic injection locking of a passively mode-locked laser: (a) fiber laser cavity modes, (b) injected spectral components, (c) harmonic locked laser operation. In (b) and (c) the dashed lines indicate nonoverlapping, thus nonparticipating, modes.

Fig. 2
Fig. 2

Experimental setup for harmonic injection locking of fiber lasers. G, EDF amplifier.

Fig. 3
Fig. 3

Injection-locked output from the fiber laser recorded by 34-GHz bandwidth sampling scope (a) at harmonics of 975 MHz and (b) at the tenth harmonic of 1970 MHz.

Fig. 4
Fig. 4

Correlation traces of the output pulse train at 40 GHz obtained by harmonic injection of an ~2-GHz, 150-μW pulse train into the fiber laser. S.H., second harmonic.

Fig. 5
Fig. 5

(a) Dependence of injection-locked pulse peak power on the injected pulse peak power. (b) Spectrum of the fiber laser output operating at injection levels of the points marked in (a); the dashed line represents the center of the injected signal spectrum.

Equations (2)

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d a n d t = j ( ω 0 - ω i ) a n + j n ( Δ ω - Δ ω i ) a n + G 1 + ( n Δ ω / Ω g ) 2 - L a n + κ s n .
T R = d A d T = j ( ω 0 - ω i ) T R A - l A + g ( 1 + 1 Ω g 2 d 2 d 2 t ) A + j D d 2 A d 2 t + ( γ - j η ) A 2 A + δ t 0 d A d t + T R κ S ( t ) .

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