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The ideality factor of a 2 μm InGaSb/AlGaAsSb quantum well laser is investigated. The total ideality factor comes mainly from the central p-n junction and two metal-semiconductor junctions. It decreases from 4.0 to 3.3 when the temperature is increased from 20 to 80 oC.
This paper describes several approaches for the calibration of translational and rotational alignment errors between a camera and a set of laser illuminators for a position determination system. Detailed algorithms are derived and covariance of calibration residuals in both error state and target position determination accuracy are obtained. An example with system design parameters is given to demonstrate...
We report efficient high-average-power, high-energy passively Q-switched operation of an Er3+-doped fluoride fiber laser at room temperature with wavelength-tunable resonator configuration utilizing a plane ruled grating for wavelength selection. The fiber laser produced stable Q-switched pulses with a maximum average output power of 5.16 W at 2811.7 nm and a maximum pulse energy of $27.7~\mu \text{J}$ ...
913 nm tapered diode lasers with 23th order laterally coupled grating is fabricated. Power of over 560 mW/facet and lateral divergence angle of 2.1° are achieved. Measured side mode suppression ratio is about 27 dB.
Temperature (20–100 °C) and excitation power (10–700 mW)-dependent photoluminescence (PL) measurements have been carried out on the 1.3 μm GaAs-based InAs quantum dot (QD) laser structures. Rate equation was used to interpret the PL behavior of the QD. The exciton behavior of the carriers in InAs QD has been verified. The excitonic modal gain has been calculated (under exciton picture) and compared...
Currents circulating in the plasma column of filaments in air are detected with a fast current monitor. The currents can be amplified with circularly polarized light.
Spontaneous currents inside the plasma column of filaments of N2 and Argon circulate in opposite directions. A competition between the laser Lorentz force and a Coulomb wake force explains the difference.
We present a compact and energy-scalable crossed polarized wave generation setup with waveguide filtering. A 1.4 mJ, 14.5 fs FTL, 10−4 contrast ratio enhanced XPW pulse is produced with 11 mJ, 40 fs input pulse.
Large-signal performance of five-stack 1.3 mum InAs/GaAs quantum-dot (QD) lasers has been investigated. Open eye pattern up to 10 Gb/s under direct modulation is demonstrated at 15degC.
An erythrocyte size and deformability measurement method using flow cytometric technique is described in this paper. The instrument employed is a slit scanning based laser flow cytometer. The measurement is made of laser absorption. Native erythrocytes, rigid cells with different extent fixation, and calibration particles are studied. It has been found that the scanning pulse width has a good linear...
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