Abstract

ARROW-type diode lasers have demonstrated high single-mode powers (0.5 W)¹ in stable beams due to strong intermodal discrimination coupled with a large index-step (~0.05) and a relatively large spot size (4–6 μm). In order to obtain even higher single-mode powers we propose a three-core ARROW device for which high-order-mode suppression is obtained primarily via high interelement loss. Intermodal discrimination values as high as 18 cm⁻¹ are obtained while the fundamental-mode loss increases by only 2–3 cm⁻¹. Furthermore, when employed as the MO for flared antiguided power amplifiers,² the MOPA near-field intensity profile is uniformized.

© 1994 IEEE