Quasi-stadium laser diodes with an unstable resonator condition |
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Authors: | Fukushima Takehiro Harayama Takahisa Davis Peter Vaccaro Pablo O Nishimura Takehiro Aida Tahito |
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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 |
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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. |
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