Effect of the [ital Y]-junction output coupler on the lasing threshold of semiconductor ring lasers

Journal Article · Mon Sep 06 04:00:00 EDT 1993 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.109719· OSTI ID:6291024

Hohimer, J P; Craft, D C; Vawter, G A ^[1]

---

1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

We report the first measurements of the effect of a [ital Y]-junction output coupler on the continuous-wave (cw) lasing threshold of rib-waveguide semiconductor ring lasers. We show that the [ital Y]-junction induced loss in this type of ring diode laser depends on the ring radius ([ital r]), and increases the lasing threshold current density substantially for devices with [ital r][lt]200 [mu]m. For our devices with radii of 50--100 [mu]m, the [ital Y]-junction loss term is shown to be the dominant factor affecting the cw lasing threshold. We also report the first measurements of the dependence of the cw lasing threshold on the width ([ital w]) of the [ital Y]-junction output coupler, and show that the threshold current density increases linearly for 0[le][ital w][le]9 [mu]m.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6291024
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:10; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
COUPLING
CURRENTS
ELECTRIC CURRENTS
ENERGY LOSSES
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
HETEROJUNCTIONS
JUNCTIONS
LASERS
LOSSES
PNICTIDES
POWER LOSSES
RING LASERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR JUNCTIONS
SEMICONDUCTOR LASERS
SOLID STATE LASERS
THRESHOLD CURRENT