Integrated Optics Techniques Applied To GaAs Lasers

R. D. Burnham; D. R. Scifres; W. Streifer

doi:10.1117/12.957224

26 July 1979 Integrated Optics Techniques Applied To GaAs Lasers

R. D. Burnham, D. R. Scifres, W. Streifer

Proceedings Volume 0176, Guided Wave Optical Systems and Devices II; (1979) https://doi.org/10.1117/12.957224
Event: Technical Symposium East, 1979, Washington, D.C., United States

Abstract

In this paper we discuss three integrated devices using GaAs/GaAlAs DH injection lasers. The first of these achieves angular scanning by adjusting the current levels between two closely spaced stripe contacts, thereby creating an asymmetric gain/refractive index through which the laser beam propagates. A deflection of the peak laser beam intensity of ±14' along the p-n junction is observed. Another structure involves operation of a branching waveguide stripe-geometry laser. This structure produces interference fringes in the far field which are spatially scanned by electrically varying the optical phase in each leg of the branching waveguide in a manner analogous to microwave phased array radar. The last structure consisted of 10 conducting 3 om stripe contacts on centers separated by D and coupled by curved waveguide sections. This device produces a high-power, phase-locked beam of small angular divergence parallel to the p-n junction Data from four stripe geometries with D ranging from 10 Um to 27.4 im are compared and overall optimal characteristics are shown to occur for D = 101.1. In that case, threshold current densities are comparable to those of solid area laser, differential quantum efficiency is approximately 60%, and maximum observed pulsed power per facet is on the order of 1 watt.

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R. D. Burnham, D. R. Scifres, and W. Streifer "Integrated Optics Techniques Applied To GaAs Lasers", Proc. SPIE 0176, Guided Wave Optical Systems and Devices II, (26 July 1979); https://doi.org/10.1117/12.957224

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KEYWORDS

Waveguides

Refractive index

Integrated optics

Phase shifts

Gallium arsenide

Pulsed laser operation

Phased array optics

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