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We demonstrate spectral control of a 1.055 mum fiber-coupled microlensed microchip VECSEL by using a coupled-cavity effect. The coupled-cavity created between the fiber and the microchip output coupler facilitates single-mode operation with fiber-coupled power above 18 mW.
Integration of optically-pumped VECSELs with pump lasers is demonstrated using an innovative contacting scheme. Devices for medium-power green conversion (lambda~1060 nm) are fabricated with threshold currents as low as 160 mA and cw output powers exceeding 100 mW.
A pulse is shortened by repeated transits of a quantum well absorber in which the band-edge is detuned to higher energy. The calculated effect is consistent with the experimentally observed formation of 448-fs transform-limited pulses.
The authors report the first passively mode-locked 830- nm vertical-external-cavity surface-emitting laser. A semiconductor saturable absorber mirror with carrier recovery time governed by surface recombination was used to demonstrate pulses of 15.3 ps duration.
We present a visible VCSEL with integrated beam splitter. By focusing one beam onto a moving target and monitoring the power variation in the second beam, these devices can be used as Doppler-based velocity sensors.
We report fabrication of GaN-based two-dimensional surface emitting photonic-crystal lasers and successful demonstration of lasing action at room temperature with the emission wavelength at 424.3 nm and a low threshold pumping energy density of 3.5 mJ/cm2.
The rms timing jitter of 500-fs optical pulses from a passively mode-locked, actively stabilised vertical-external-cavity surface-emitting laser was determined by the Von der Linde method to be 350 fs over 500 Hz - 500 KHz.
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