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- W2077807354 abstract "We have designed and fabricated a quantum dot (QD) gain medium which consists of InAs QDs in an InGaAsP matrixon an InP substrate. By using these InAs/InP QD layers, we have generated femtosecond (fs) pulses with pulse durationof 295 fs from a single-section monolithic Fabry-Perot (F-P) cavity at the repetition rate of 50 GHz around 1560 nmwavelength range without any external pulse compression. The average output power is 40.1 mW at the injection currentof 200 mA. Optical signal-to-noise ratio (OSNR) of the proposed QD mode-locked laser (QD-MLL) is up to 50 dB. Thelasing threshold current and the external differential quantum efficiency are 23 mA and 30 %, respectively. And themode beating linewidth was measured to be less than 20 KHz. We have interpreted that several nonlinear optical effectsrelated to interaction of QD excitons with intracavity laser fields could create nonlinear dispersion to compensateintracavity linear dispersion. So total dispersion is minimized and four-wave mixing (FWM) is dramatically enhancedwithin QD F-P cavity. If spectral bandwidth is broad enough, tens or hundreds of longitudinal modes would lase andtheir phases would be locked together through FWM process. Eventually a train of fs pulses with a repetition ratecorresponding to cavity round-trip time is generated." @default.
- W2077807354 created "2016-06-24" @default.
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- W2077807354 date "2009-02-12" @default.
- W2077807354 modified "2023-09-27" @default.
- W2077807354 title "A passive mode-locked InAs/InP quantum dot laser with pulse duration of less than 300 fs" @default.
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- W2077807354 doi "https://doi.org/10.1117/12.809525" @default.
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