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Using diode lasers for atomic physics

What is the use of laser in atomic physics?
Atom lasers are critical for atom holography.
Similar to conventional holography, atom holography uses the diffraction of atoms.
The De Broglie wavelength of the atoms is much smaller than the wavelength of light, so atom lasers can create much higher resolution holographic images.
What are the applications of laser diode in physics?
Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber optic communications, barcode readers, laser pointers, CD/DVD/Blu-ray disc reading/recording, laser printing, laser scanning and light beam illumination.
Does diode laser emit radiation?
Diode lasers are a class of lasers that generate laser radiation through a semiconductor.
In general, single emitter laser diodes offer up to roughly 12 watts of optical output power.
To get higher power levels, two packaging approaches are used to combine multiple single emitter beams into one single high power output beam.

What is the use of laser in atomic physics?