Abstract

A mode-hop-free tunable external-cavity Littrow diode laser with intracavity acousto-optic modulators (AOMs) has been built. The modes of the red laser diode without a special antireflection coating are shifted by varying the injection current. The external resonator modes and the grating selectivity are independently electrically alterable by two AOMs. Thus, a tuning of the external resonator over up to 1900GHz is possible. A precise computer control of laser diode and AOMs allowed a single-mode tuning of the whole laser with a tuning range of 225GHz in 250s. Additionally, we demonstrated fast tuning over 90GHz in 190μs and a repetition rate of 2.5kHz.

© 2007 Optical Society of America

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References

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  1. C. Ye, Tunable External Cavity Diode Lasers (World Scientific, 2004).
    [CrossRef]
  2. M. Kourogi, K. Imai, B. Widyatmoko, T. Shimizu, and M. Ohtsu, Opt. Lett. 25, 1165 (2000).
    [CrossRef]
  3. G. Owen and W. R. Trutna, Appl. Opt. 44, 4972 (2005).
    [CrossRef] [PubMed]
  4. W. R. Trutna and P. Zorabedian, Hewlett-Packard J. 44, 35 (1993).
  5. K. Petermann, Laser Diode Modulation and Noise (Kluwer, 1991).
  6. R. W. Tkach and A. R. Chraplyvy, J. Lightwave Technol. 4, 1655 (1986).
    [CrossRef]

2005 (1)

2004 (1)

C. Ye, Tunable External Cavity Diode Lasers (World Scientific, 2004).
[CrossRef]

2000 (1)

1993 (1)

W. R. Trutna and P. Zorabedian, Hewlett-Packard J. 44, 35 (1993).

1991 (1)

K. Petermann, Laser Diode Modulation and Noise (Kluwer, 1991).

1986 (1)

R. W. Tkach and A. R. Chraplyvy, J. Lightwave Technol. 4, 1655 (1986).
[CrossRef]

Chraplyvy, A. R.

R. W. Tkach and A. R. Chraplyvy, J. Lightwave Technol. 4, 1655 (1986).
[CrossRef]

Imai, K.

Kourogi, M.

Ohtsu, M.

Owen, G.

Petermann, K.

K. Petermann, Laser Diode Modulation and Noise (Kluwer, 1991).

Shimizu, T.

Tkach, R. W.

R. W. Tkach and A. R. Chraplyvy, J. Lightwave Technol. 4, 1655 (1986).
[CrossRef]

Trutna, W. R.

G. Owen and W. R. Trutna, Appl. Opt. 44, 4972 (2005).
[CrossRef] [PubMed]

W. R. Trutna and P. Zorabedian, Hewlett-Packard J. 44, 35 (1993).

Widyatmoko, B.

Ye, C.

C. Ye, Tunable External Cavity Diode Lasers (World Scientific, 2004).
[CrossRef]

Zorabedian, P.

W. R. Trutna and P. Zorabedian, Hewlett-Packard J. 44, 35 (1993).

Appl. Opt. (1)

Hewlett-Packard J. (1)

W. R. Trutna and P. Zorabedian, Hewlett-Packard J. 44, 35 (1993).

J. Lightwave Technol. (1)

R. W. Tkach and A. R. Chraplyvy, J. Lightwave Technol. 4, 1655 (1986).
[CrossRef]

Opt. Lett. (1)

Other (2)

C. Ye, Tunable External Cavity Diode Lasers (World Scientific, 2004).
[CrossRef]

K. Petermann, Laser Diode Modulation and Noise (Kluwer, 1991).

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Figures (2)

Fig. 1
Fig. 1

Scheme of the setup. PLL 1 and PLL 2 are frequency synthesizers. Both AOMs are oriented with the sound wave propagation in opposite directions. The + 1 diffraction order of AOM 1 and the 1 order of AOM 2 are used.

Fig. 2
Fig. 2

(a) Slow single-mode tuning of the laser system: injection current with a linear fit (dashed line) and laser frequency changing are displayed. (b) Deviation of measured injection current from a linear plot. (c) Fast single-mode tuning. (d) Deviation of measured injection current from a linear plot.

Equations (6)

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Δ ν L i t t = c 0 2 cos α c S g ν sin 2 α Δ F .
ν L D , k = k c 0 2 L L D ,
Δ ν L D = γ Δ I ,
ν e x t , m = m c 0 2 n L e x t φ A O M 2 π c 0 2 L e x t .
φ A O M 1 = 2 π F t + φ 1 , φ A O M 2 = ( 2 π F t + φ 2 ) ,
ν e x t , m = m c 0 2 L e x t 2 ( φ 1 φ 2 ) 2 π c 0 2 L e x t .

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