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Optics Letters

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  • Vol. 13, Iss. 6 — Jun. 1, 1988
  • pp: 455–457

Modal coupling in tilted-mirror waveguide lasers and amplifiers

Joseph Salzman, Raymond J. Hawkins, and T. P. Lee  »View Author Affiliations


Optics Letters, Vol. 13, Issue 6, pp. 455-457 (1988)
http://dx.doi.org/10.1364/OL.13.000455


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Abstract

Tilted-mirror facets have been introduced as a design alternative to antireflection coating for waveguide structures that require low facet reflectivity. We show that tilted-mirror facets with finite reflectivity can induce significant intermode coupling in semiconductor lasers and optical amplifiers. We describe the effect of tilt-induced intermode coupling on the cavity modes using a simple model and discuss the implications of our results on the design of tilted-mirror integrated-optical lasers and amplifiers.

© 1988 Optical Society of America

History
Original Manuscript: September 22, 1987
Manuscript Accepted: March 3, 1988
Published: June 1, 1988

Citation
Joseph Salzman, Raymond J. Hawkins, and T. P. Lee, "Modal coupling in tilted-mirror waveguide lasers and amplifiers," Opt. Lett. 13, 455-457 (1988)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-13-6-455


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References

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  15. In writing Eq. (1) it is assumed that the waveguide is sufficiently long that leaky and radiation modes are strongly attenuated and can be ignored. The transverse y dependence of the field can be eliminated by an effective-index approximation.
  16. Equation (5) is a generalization to finite angles of incidence and intermode coupling of an earlier result due to J. McKenna, cited in F. K. Reinhart, I. Hayashi, M. B. Panish, J. Appl. Phys. 42, 4466 (1971). [CrossRef]
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  18. The values of Kij depend on the modal profiles. For example, a cosh2(x) distribution may result in smaller values of Kij because their spectra of plane waves are narrower than the ones computed here. However, the ratios |Kij/K00| are expected to increase with tilt parameter in a way similar to that of the ratios computed from Eqs. (7a)–(7c).

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