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We report on our most recent results on quantum dot (QD) laser devices around 1550 nm based on InAs/InP QD gain materials. These devices include monolithic QD multi-wavelength lasers (MWLs), mode-locked lasers (MLLs) and distributed feedback (DFB) lasers. The performance and potential applications of fiber communications will be discussed.
Single-mode InAs/InP quantum dot DFB lasers with side-mode suppression ratio greater than 62 dB are demonstrated, operating CW up to 80°C. Relative intensity noise was less than -153 dB/Hz from 1 MHz to 10 GHz.
We demonstrate 437 GHz optical pulse train generation based on grating coupled external cavities using InAs/InP quantum dots as the gain material. It is the highest repetition rate ever produced by QD lasers.
Ultrastructural studies have shown that the formation of pigment glands in Gossypium hirsutum L. leaves is a lysigenous process, originating from a cluster of cells in the ground meristem. Various techniques were used here to investigate whether programmed cell death (PCD) plays a critical role in this developmental process. Nuclei of internal cells in the pigment gland‐forming tissue were TUNEL‐positive...
Due to small dimensions and low fluid velocity, mixing in microfluidic systems is usually poor. In this study, we report a method of enhancing microfluidic mixing using acoustically induced gas bubbles. The effect of applied frequency on mixing was investigated over the range 0.5–10 kHz. Under either low frequency 0.5 kHz or high frequency 10 kHz, no noticeable improvement in the present mixer was...
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