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

2004

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

2000

1993

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

1991

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

1986

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.

Hewlett-Packard J.

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

J. Lightwave Technol.

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

Opt. Lett.

Other

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

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

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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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