Abstract

We use a mutually pumped phase conjugator to guide the output beam of a single-mode laser diode into the active region of a high-power laser-diode array. This injected beam locks the frequency of the array, causing it to emit a single, 1.45 times diffraction-limited, continuous-wave output beam containing 85% of the array’s total output power. Phase-conjugate injection dramatically improves the coupling into the laser array, so that less than a milliwatt of injected power is sufficient to lock all the array’s 450-mW output to the frequency of the master laser.

© 1994 Optical Society of America

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  1. L. Goldberg, J. F. Weller, Appl. Phys. Lett. 46, 236 (1985).
    [CrossRef]
  2. M. K. Chun, L. Goldberg, J. F. Weller, Opt. Lett. 14, 272 (1989).
    [CrossRef] [PubMed]
  3. B. Fischer, S. Sternklar, Appl. Phys. Lett. 51, 74 (1987).
    [CrossRef]
  4. M. D. Ewbank, Opt. Lett. 13, 47 (1988).
    [CrossRef] [PubMed]
  5. G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.
  6. S. MacCormack, J. Feinberg, Opt. Lett. 18, 211 (1993).
    [CrossRef] [PubMed]
  7. M. Cronin-Golomb, Tufts University, Medford, Mass. 02155 (personal communication, 1991).
  8. H. Adachihara, O. Hess, R. Indik, J. V. Moloney, J. Opt. Soc. Am. B 10, 496 (1993).
    [CrossRef]
  9. M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
    [CrossRef]
  10. S. C. De La Cruz, S. MacCormack, J. Feinberg, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS54.
  11. G. L. Abbas, S. Yang, V. W. S. Chan, J. G. Fujimoto, Opt. Lett. 12, 605 (1987).
    [CrossRef] [PubMed]
  12. L. Goldberg, J. F. Weller, Appl. Phys. Lett. 53, 1900 (1988).
    [CrossRef]
  13. L. Goldberg, J. F. Weller, Electron. Lett. 22, 858 (1986).
    [CrossRef]
  14. G. W. Ross, R. W. Eason, Opt. Lett. 18, 571 (1993).
    [CrossRef] [PubMed]

1993 (3)

1989 (1)

1988 (2)

M. D. Ewbank, Opt. Lett. 13, 47 (1988).
[CrossRef] [PubMed]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 53, 1900 (1988).
[CrossRef]

1987 (3)

B. Fischer, S. Sternklar, Appl. Phys. Lett. 51, 74 (1987).
[CrossRef]

M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
[CrossRef]

G. L. Abbas, S. Yang, V. W. S. Chan, J. G. Fujimoto, Opt. Lett. 12, 605 (1987).
[CrossRef] [PubMed]

1986 (1)

L. Goldberg, J. F. Weller, Electron. Lett. 22, 858 (1986).
[CrossRef]

1985 (1)

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 46, 236 (1985).
[CrossRef]

Abbas, G. L.

Adachihara, H.

Chan, V. W. S.

Chun, M. K.

Cronin-Golomb, M.

M. Cronin-Golomb, Tufts University, Medford, Mass. 02155 (personal communication, 1991).

De La Cruz, S. C.

S. C. De La Cruz, S. MacCormack, J. Feinberg, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS54.

Eason, R. W.

G. W. Ross, R. W. Eason, Opt. Lett. 18, 571 (1993).
[CrossRef] [PubMed]

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

Ewbank, M. D.

Feinberg, J.

S. MacCormack, J. Feinberg, Opt. Lett. 18, 211 (1993).
[CrossRef] [PubMed]

S. C. De La Cruz, S. MacCormack, J. Feinberg, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS54.

Fischer, B.

B. Fischer, S. Sternklar, Appl. Phys. Lett. 51, 74 (1987).
[CrossRef]

M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
[CrossRef]

Fujimoto, J. G.

Garrett, M. H.

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

Goldberg, L.

M. K. Chun, L. Goldberg, J. F. Weller, Opt. Lett. 14, 272 (1989).
[CrossRef] [PubMed]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 53, 1900 (1988).
[CrossRef]

L. Goldberg, J. F. Weller, Electron. Lett. 22, 858 (1986).
[CrossRef]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 46, 236 (1985).
[CrossRef]

Hess, O.

Hribek, P.

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

Indik, R.

MacCormack, S.

S. MacCormack, J. Feinberg, Opt. Lett. 18, 211 (1993).
[CrossRef] [PubMed]

S. C. De La Cruz, S. MacCormack, J. Feinberg, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS54.

Moloney, J. V.

Ross, G. W.

G. W. Ross, R. W. Eason, Opt. Lett. 18, 571 (1993).
[CrossRef] [PubMed]

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

Rytz, D.

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

Segev, M.

M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
[CrossRef]

Sternklar, S.

B. Fischer, S. Sternklar, Appl. Phys. Lett. 51, 74 (1987).
[CrossRef]

Weiss, S.

M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
[CrossRef]

Weller, J. F.

M. K. Chun, L. Goldberg, J. F. Weller, Opt. Lett. 14, 272 (1989).
[CrossRef] [PubMed]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 53, 1900 (1988).
[CrossRef]

L. Goldberg, J. F. Weller, Electron. Lett. 22, 858 (1986).
[CrossRef]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 46, 236 (1985).
[CrossRef]

Yang, S.

Appl. Phys. Lett. (4)

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 46, 236 (1985).
[CrossRef]

B. Fischer, S. Sternklar, Appl. Phys. Lett. 51, 74 (1987).
[CrossRef]

M. Segev, S. Weiss, B. Fischer, Appl. Phys. Lett. 50, 1397 (1987).
[CrossRef]

L. Goldberg, J. F. Weller, Appl. Phys. Lett. 53, 1900 (1988).
[CrossRef]

Electron. Lett. (1)

L. Goldberg, J. F. Weller, Electron. Lett. 22, 858 (1986).
[CrossRef]

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

Opt. Lett. (5)

Other (3)

G. W. Ross, P. Hribek, R. W. Eason, M. H. Garrett, D. Rytz, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CFC4.

M. Cronin-Golomb, Tufts University, Medford, Mass. 02155 (personal communication, 1991).

S. C. De La Cruz, S. MacCormack, J. Feinberg, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS54.

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Figures (3)

Fig. 1
Fig. 1

Experimental setup. The combination of a Faraday polarizer and a λ/2 plate isolates the single-mode master laser. The slit selects one lobe of the array slave laser. Both the master and slave laser beams enter the BaTiO3 crystal and fan toward its top face. (The crystal’s +c axis faces up, normal to the plane of this figure.) The inset shows a side view of the BaTiO3 crystal and the bird-wing pattern made by the laser beams.

Fig. 2
Fig. 2

Far-field spatial pattern of the diode array (a) when free running and (b) when injection locked. The FWHM of the main lobe in (b) is 0.38°, which is 1.45 times the diffraction limit (a Strehl ratio of 0.37). The total output power for each case is 450 mW.

Fig. 3
Fig. 3

Diode-array spectra measured with a 1.4-m spectrometer when (a) free running and (b) locked. Once the array is locked, (c) and (d) show the high-resolution spectra of the slave and master laser output beams, respectively; their frequency bandwidth is narrower than the 750-MHz resolution of our spectrum analyzer.

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