Effect of injection current on the dielectric constant of an inbuilt waveguide in twin-transverse-junction stripe lasers

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Effect of injection current on the dielectric constant of an inbuilt waveguide in twin-transverse-junction stripe lasers

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© The Institution of Electrical Engineers
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An investigation has been made of the role of injected carriers in reducing the effective dielectric constant of the inbuilt waveguide of a (GaAl)As double-heterostructure twin-transverse-junction (t.t.j.) stripe laser fabricated by deep Zn diffusion. The technique employed in this study is the measurement of the spectral shift of each Fabry-Perot mode as a function of drive current. The results show that the injected carriers contribute (Δε)c=−5.92=10−2 to the effective dielectric constant of the waveguide at threshold.

Inspec keywords: optical waveguides; permittivity; semiconductor junction lasers

Other keywords: double heterostructure twin transverse junction stripe lasers; optical; injection current; dielectric constant; inbuilt waveguide; Fabry Perot mode; semiconductor; spectral shift; drive current

Subjects: Lasing action in semiconductors; Semiconductor lasers; Optical waveguides; Optical waveguides and couplers; Design of specific laser systems

References

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      • P.R. Selway , G.H.B. Thompson , G.D. Henshall , J.E.A. Whiteaway . Measurement of the effect of injected carriers on the p-n refractive index step in single heterostructure diode lasers. Electron. Lett. , 453 - 455
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      • G.H.B. Thompson , D.F. Lovelace , S.E.H. Turley . Kinks in the light/current characteristics and near-field shifts in (GaAl)As heterostructure stripe lasers and their explanation by the effect of self-focusing on a built-in optical waveguide. IEE J. Solid-State & Electron Devices , 1 , 12 - 30
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      • T. L. Paoli . A new technique for measuring the thermal impedance of junction lasers. IEEE J. Quantum Electron. , 498 - 503
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      • G.H.B. Thompson , D.F. Lovelace , S.E.H. Turley . Twin-transverse-junction stripe laser with linear light-current characteristic and low threshold. Electron. Lett. , 133 - 134
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