Abstract

A general method of producing multielement amplifiers having a single output beam is described. The basic building blocks for these are either Michelson interferometers or Mach–Zehnder interferometers modified by the inclusion of gain in at least one arm of the interferometer. Demonstration of these multielement interferometric power amplifiers using broad-area AlGaAs gain elements and a single-mode AlGaAs master oscillator is described.

© 1989 Optical Society of America

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References

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  1. J. Harrison, G. A. Rines, P. F. Moulton, J. R. Leger, Opt. Lett. 13, 111 (1988).
  2. J. R. Leger, G. J. Swanson, W. B. Veldkamp, Appl. Opt. 26, 4391 (1987).
  3. R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).
  4. V. Napasab, T. Okoshi, in Digest of Conference on Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1988), paper TUC3.
  5. V. Ramaswamy, R. D. Standley, Bell Syst. Tech. J. 55, 767 (1976).
  6. L. L. Buhl, R. C. Alferness, Opt. Lett. 12, 778 (1987).
  7. F. A. Jenkins, H. E. White, Fundamentals of Optics, 4th ed. (McGraw-Hill, New York, 1957), Chap. 25.4.
  8. J. R. Andrews, Appl. Phys. Lett. 48, 1331 (1986).
  9. J. Feinberg, Opt. Lett. 8, 569 (1983).

1988 (1)

1987 (2)

1986 (1)

J. R. Andrews, Appl. Phys. Lett. 48, 1331 (1986).

1985 (1)

R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).

1983 (1)

1976 (1)

V. Ramaswamy, R. D. Standley, Bell Syst. Tech. J. 55, 767 (1976).

Alferness, R. C.

Andrews, J. R.

J. R. Andrews, Appl. Phys. Lett. 48, 1331 (1986).

Buhl, L. L.

Feinberg, J.

Harrison, J.

Jenkins, F. A.

F. A. Jenkins, H. E. White, Fundamentals of Optics, 4th ed. (McGraw-Hill, New York, 1957), Chap. 25.4.

Leger, J. R.

Moulton, P. F.

Napasab, V.

V. Napasab, T. Okoshi, in Digest of Conference on Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1988), paper TUC3.

Okoshi, T.

V. Napasab, T. Okoshi, in Digest of Conference on Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1988), paper TUC3.

Ramaswamy, V.

V. Ramaswamy, R. D. Standley, Bell Syst. Tech. J. 55, 767 (1976).

Rediker, R. H.

R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).

Rines, G. A.

Schloss, R. P.

R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).

Standley, R. D.

V. Ramaswamy, R. D. Standley, Bell Syst. Tech. J. 55, 767 (1976).

Swanson, G. J.

Van Ruyven, L. J.

R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).

Veldkamp, W. B.

White, H. E.

F. A. Jenkins, H. E. White, Fundamentals of Optics, 4th ed. (McGraw-Hill, New York, 1957), Chap. 25.4.

Appl. Opt. (1)

Appl. Phys. Lett. (2)

R. H. Rediker, R. P. Schloss, L. J. Van Ruyven, Appl. Phys. Lett. 46, 133 (1985).

J. R. Andrews, Appl. Phys. Lett. 48, 1331 (1986).

Bell Syst. Tech. J. (1)

V. Ramaswamy, R. D. Standley, Bell Syst. Tech. J. 55, 767 (1976).

Opt. Lett. (3)

Other (2)

F. A. Jenkins, H. E. White, Fundamentals of Optics, 4th ed. (McGraw-Hill, New York, 1957), Chap. 25.4.

V. Napasab, T. Okoshi, in Digest of Conference on Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1988), paper TUC3.

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Figures (4)

Fig. 1
Fig. 1

Basic recombining element and the mutually coherent incident and exiting optical fields.

Fig. 2
Fig. 2

Interferometric power amplifier configurations. (a) The modified Mach–Zehnder interferometer, one of the basic interferometer amplifier building blocks. (b) The modified Michelson interferometer, another basic building block. (c) The nested Mach–Zehnder interferometric amplifier, which provides preamplifier and power amplifier stages for efficient power scale-up. (d) The multistage Michelson amplifier, another of the many possible configurations. MO, master oscillator; BS, beam splitter; G, gain element; M, mirror; P, phase shifter.

Fig. 3
Fig. 3

Intensity of the two beams exiting the Mach–Zehnder interferometric amplifier (A and B) and the total intensity (A + B) in the two beams as a function of the relative phase shift in the two arms of the interferometer.

Fig. 4
Fig. 4

Beam combining in the interferometric amplifier in free space from a pair of broad-area AlGaAs amplifiers. The coherent sum (curve a) and difference (curve b) are shown with the individual beams exiting the combiner in one direction (curves c and d).

Equations (7)

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I p = | i E i [ r , Φ i ( t ) ] | 2 ,
I P 1 = A 1 2 r 2 + A 2 2 ( 1 r 2 ) + 2 A 1 A 2 r × ( 1 r 2 ) 1 / 2 cos ( Δ Φ ) ,
I P 2 = A 2 2 r 2 + A 1 2 ( 1 r 2 ) + 2 A 1 A 2 r × ( 1 r 2 ) 1 / 2 cos ( Δ Φ + π ) ,
Δ Φ = 0 ,
I 1 I 2 = R T ,
I P 2 = 0
I P 1 = I 1 + I 2 .

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