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Liu, Haoling; Smowton, Peter; Summers, Huw; Edwards, Gareth; Drexler, Wolfgang (2009)
Publisher: American Institute of Physics
Languages: English
Types: Article
Subjects: QC, RE
Identifiers:doi:10.1063/1.3227654
We examine self-pulsing, edge emitting, quantum dot laser diodes as continuous broad spectrum light sources emitting at ∼ 1050 nm. Devices are configured with split contacts. When operated without a saturable absorber, the laser emits a number of discrete narrow modes, which merge to form a broad continuous lasing spectrum on application of the saturable absorber. The broadened spectra are consistent with the modulated carrier density expected under Q-switched operation. This provides a simple technique for generating emission suitable for biomedical applications. The spectral width achieved is ∼ 10 nm, and the average output power is 7.5 mW.
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