Title :
Superluminescent diodes with bent waveguide
Author :
Lin, Ching-Fuh ; Juang, Chaw-Shiuann
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
Superluminescent diodes are fabricated with a bent waveguide to prevent optical feedback. The bent ridge waveguide is formed with one end normal to the cleaved facet and the other angled at 7/spl deg/ from the facet normal. The spectral ripple of these devices is around 10% at 6 mW output power. The farfield pattern emitted from the angled facet is crescent-shaped. As the device is set up in an external-cavity configuration, lasing operation is observed regardless of the additional 10.8 dB bending loss introduced by the bent waveguide.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; gradient index optics; laser cavity resonators; optical fabrication; optical losses; optical waveguides; quantum well lasers; ridge waveguides; superluminescent diodes; vapour phase epitaxial growth; waveguide lasers; 10.8 dB; 6 mW; GaAs-AlGaAs; angled facet; bending loss; bent ridge waveguide; bent waveguide; cleaved facet; crescent-shaped pattern; external-cavity configuration; fabrication; facet normal; farfield pattern; lasing operation; optical feedback; output power; spectral ripple; superluminescent diodes; Chemical lasers; Coatings; Metallization; Optical device fabrication; Optical waveguides; Power generation; Power measurement; Superluminescent diodes; Waveguide components; Wet etching;
Journal_Title :
Photonics Technology Letters, IEEE
