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A device that uses the principle of amplification of electromagnetic waves by stimulated emission of radiation, and operates in the infrared, visible,...
Recent advances in laser science and technology include the development of high-power diode lasers, the use of copper vapor lasers in a wide variety...
Observing the evolution of an event in time requires a device that is faster than the event. To examine how a balloon pops, for example, we can take...
Laser applications (in 'Adaptive optics' article)
Adaptive optics is used to improve the quality of beams generated in laser cavities, and also to compensate for thermal effects and turbulence in the
Laser beacons (in 'Adaptive optics' article)
The only method of obtaining good sky coverage at shorter wavelengths is the use of laser beacons, which may be created in the upper atmosphere either
Lasers and masers (in 'Coherence' article)
Because they are highly coherent sources, lasers and masers provide very large intensities per unit frequency, and double-photon absorption experiment
Lasers and distributed feedback (in 'Integrated optics' article)
The diode laser is already an integrated optics device in a sense since the lasing medium is a waveguide laser interposed between two cladding layers.
Stabilized lasers (in 'Light' article)
Before the advent of the laser, the most spectrally pure light came from the emission of radiation by atoms in electric discharges. The spectral puri
Laser transmitter (in 'Optical communications' article)
The laser (light amplification by stimulated emission of radiation) used in optical communications is a semiconductor device. When a voltage is applie
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= Encyclopedia Article; = Research Update
Figure 1.Basic components of a diode laser chip.
From update 'Laser research'
Figure 1.Typical setup of an intensity autocorrelator. The inset shows two possible plots of pulse intensity versus time that yield the same autocorrelation traces.
Figure 2.FROG technique. (a) Experimental FROG traces. (b) Corresponding retrieved intensity and phase profiles of laser pulses.
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