Lowest-order axial and ring mode lasing in confocal quasi-stadium laser diodes

Takehiro Fukushima; Satoshi Sunada; Takahisa Harayama; Koichiro Sakaguchi; Yasunori Tokuda

doi:10.1364/AO.51.002515

Lowest-order axial and ring mode lasing in confocal quasi-stadium laser diodes

Takehiro Fukushima, Satoshi Sunada, Takahisa Harayama, Koichiro Sakaguchi, Yasunori Tokuda

School of Advanced Science and Engineering

Research output: Contribution to journal › Article

11 Citations (Scopus)

Abstract

We investigated the lasing modes of quasi-stadium laser diodes that have confocal cavity geometries, with stripe electrode contacts formed either along the cavity axis or a diamond-shaped trajectory. It was clearly demonstrated thatbyusing narrow electrode contact patternsof 2 μm width, the lowest-order axial and ring modes were excited selectively. On the other hand, the second-lowest-order axial and ring modes were excited by using broad electrode patterns of 14 μm width. Experimentally obtained far-field patterns for lasers with broad and narrow electrode contact patterns agree very well with the simulation results obtained using an extended Fox-Li mode calculation method.

Original language	English
Pages (from-to)	2515-2520
Number of pages	6
Journal	Applied Optics
Volume	51
Issue number	14
DOIs	https://doi.org/10.1364/AO.51.002515
Publication status	Published - 2012 May 10

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ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

Cite this

Fukushima, T., Sunada, S., Harayama, T., Sakaguchi, K., & Tokuda, Y. (2012). Lowest-order axial and ring mode lasing in confocal quasi-stadium laser diodes. Applied Optics, 51(14), 2515-2520. https://doi.org/10.1364/AO.51.002515

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10.1364/AO.51.002515