Novel fabrication-tolerant twin-guide laser structure with an external passive waveguide

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Novel fabrication-tolerant twin-guide laser structure with an external passive waveguide

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The authors propose a novel quasi-symmetrical twin-guide GaAs/AlGaAs laser structure (QSTGL) with a low-loss external passive waveguide. The device is tolerant to fabrication misalignment and therefore well suited for monolithic integration. Threshold current densities of less than 1.1 kA/cm2 and a coupling efficiency between 70 and 80% into the low-loss passive waveguide are achieved.

Inspec keywords: optical couplers; semiconductor lasers; optical waveguides; aluminium compounds; III-V semiconductors; integrated optoelectronics; gallium arsenide

Other keywords: threshold current densities; external passive waveguide; quasi-symmetrical twin-guide GaAs/AlGaAs laser; coupling efficiency; GaAs-AlGaAs; 70 to 80 percent; monolithic integration; fabrication-tolerant twin-guide laser structure

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

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