RESUMO
Amplitude noise spectra from the nonclassical output of an injection-locked low-temperature quantum-well laser analyzed along orthogonal polarization axes reveals correlated polarization-dependent noise. Using polarization-preserving balanced homodyne detection to suppress these effects, we demonstrate photon-number fluctuations 4.5 dB below the semiclassical shot-noise limit (within 95% of the expected squeezing based on the device efficiency). Polarization mixing through birefringent components and, more significantly, correlated fluctuations originating in the laser gain medium are shown to account for the observations.
RESUMO
We demonstrate the conversion of a time-varying (50-400-MHz) electrical current into an optical power with fidelity 0.8 dB (1.35 dB after correction for detection efficiency) beyond the standard quantum limit by drive-current modulation of an injection-locked quantum-well laser.
RESUMO
High-impedance pump noise suppression was used to generate amplitude squeezing in an index-guided quantumwell laser. Light exhibiting photon-number noise 1.4 dB below the shot-noise limit was observed, and the corresponding polarization properties were examined. an unsaturated detector revealed 2.9 dB of squeezing.
RESUMO
The output of seven laser-diode arrays, combined by a bundle of seven optical fibers, was used to end pump a Nd:YAG solid-state laser. Under a rated operation of 1 A/diode, maximum TEM(00) single-mode output power of 660 mW was obtained with 4.4% total electrical-to-optical conversion efficiency.
RESUMO
Continuous-wave output power levels of 12.5 W from one facet and power-conversion efficiencies as high as 42% have been obtained from a 1-cm monolithic AlGaAs laser array. The array consists of twenty 10-stripe lasers.
RESUMO
The power available from transistor-sized semiconductor diode lasers has increased rapidly in recent years, more than doubling every year. Continuous outputs of several watts and pulsed powers in the kilowatt range with 50 percent overall efficiency are now possible with these compact devices. These developments may signal the start of a technological advancement in optics comparable to the solid-state revolution in electronics 20 years ago.
RESUMO
Separate-confinement heterostructure lasers with thin active regions are analyzed. For four different interiorcladding-region refractive-index spatial variations, i.e., step, triangular, parabolic, and inverted parabolic, waveguidemodes are calculated and thresholds are compared. Based on optical considerations alone, the step-indexprofile has the lowest threshold; however, for optimum cladding thicknesses the differences are not great.