title: Quasi-stadium laser diodes with an unstable resonator condition.
abstract: We have observed lasing in a complicated eigenmode of a quasi-stadium laser diode with an unstable resonator consisting of two curved end mirrors obeying an unstable resonator condition and two straight sidewall mirrors. The laser was fabricated by application of a reactive-ion-etching technique to a molecular beam epitaxy-grown graded-index separate-confinement heterostructure single-quantum-well GaAs/AlGaAs structure. The far-field pattern shows that the lasing mode corresponds to the complicated lowest-loss mode obtained numerically by an extended Fox-Li method.
authors.affiliation: Department of Communication Engineering, Faculty of Computer Science and System Engineering, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan. fuku@c.oka-pu.ac.jp
authors.forename: Takehiro
authors.initials: T
authors.lastname: Fukushima
authors.forename: Takahisa
authors.initials: T
authors.lastname: Harayama
authors.forename: Peter
authors.initials: P
authors.lastname: Davis
authors.forename: Pablo O
authors.initials: PO
authors.lastname: Vaccaro
authors.forename: Takehiro
authors.initials: T
authors.lastname: Nishimura
authors.forename: Tahito
authors.initials: T
authors.lastname: Aida