Abstract

We fabricated quasi-stadium laser diodes whose resonators consist of two concentric curved end mirrors and two straight sidewall mirrors. We observed two lasing modes that correspond to different beam propagations along the cavity axis and along a ring trajectory, and different far-field patterns with wide angular separation. The modes can be selected by control of an electrode pattern. We also show that the far-field patterns numerically obtained by the extended Fox–Li mode calculation method are in good agreement with the experimental results.

© 2002 Optical Society of America

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References

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  1. T. Fukushima, J. Lightwave Technol. 18, 2208 (2000).
    [CrossRef]
  2. A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).
  3. T. Fukushima, S. A. Biellak, Y. Sun, and A. E. Siegman, Opt. Express 2, 21 (1998), http://www.opticsexpress.org .
    [CrossRef] [PubMed]
  4. N. Chinone, J. Appl. Phys. 48, 3237 (1977).
    [CrossRef]
  5. S. A. Biellak, Y. Sun, S. S. Wong, and A. E. Siegman, J. Appl. Phys. 78, 4294 (1995).
    [CrossRef]

2000

1998

1995

S. A. Biellak, Y. Sun, S. S. Wong, and A. E. Siegman, J. Appl. Phys. 78, 4294 (1995).
[CrossRef]

1977

N. Chinone, J. Appl. Phys. 48, 3237 (1977).
[CrossRef]

Biellak, S. A.

Chinone, N.

N. Chinone, J. Appl. Phys. 48, 3237 (1977).
[CrossRef]

Fukushima, T.

Siegman, A. E.

T. Fukushima, S. A. Biellak, Y. Sun, and A. E. Siegman, Opt. Express 2, 21 (1998), http://www.opticsexpress.org .
[CrossRef] [PubMed]

S. A. Biellak, Y. Sun, S. S. Wong, and A. E. Siegman, J. Appl. Phys. 78, 4294 (1995).
[CrossRef]

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

Sun, Y.

Wong, S. S.

S. A. Biellak, Y. Sun, S. S. Wong, and A. E. Siegman, J. Appl. Phys. 78, 4294 (1995).
[CrossRef]

J. Appl. Phys.

N. Chinone, J. Appl. Phys. 48, 3237 (1977).
[CrossRef]

S. A. Biellak, Y. Sun, S. S. Wong, and A. E. Siegman, J. Appl. Phys. 78, 4294 (1995).
[CrossRef]

J. Lightwave Technol.

Opt. Express

Other

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

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Figures (4)

Fig. 1
Fig. 1

Schematic diagram of the quasi-stadium laser diode under a concentric resonator condition: (a) typical structure of the laser diode, (b) closed trajectories inside the resonator, (c) contact patterns of Type A and B laser diodes.

Fig. 2
Fig. 2

Light output power versus injection current characteristics. Insets show the lasing spectrum in the case of 10-mW output power.

Fig. 3
Fig. 3

Observed far-field patterns under pulsed operation at 10-mW output power for (a) Type A and (b) Type B.

Fig. 4
Fig. 4

Calculated far-field patterns for the lowest-order mode (a) along the cavity axis and (b) along the ring trajectory.

Equations (1)

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θ=±sin-1neffWL2+W2,

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