Q-switched laser


Also found in: Medical.

Q-switched laser

[′kyü ‚swicht ′lā·zər]
(optics)
A laser whose Q factor is kept at a low value while an ion population inversion is built up, and then is suddenly switched to a high value just before instability occurs, resulting in a very high rate of stimulated emission. Also known as giant pulse laser.
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SAN DIEGO -- Picosecond lasers have surpassed Q-switched lasers as the treatment of choice for tattoo removal, delivering high energies in trillionths of a second.
"Q-Plus Series is based on a Q-Switched laser technology that ensures a great versatility in clinical applications such as tattoo removal and benign pigmented lesions removal," clarified a spokesperson.
The Q-switched laser takes so many treatments, she said, and costs add up, discouraging many.
"Now that we have the face so well treated, we're looking at the hands, neck and decollete." Sadick uses the Fraxel laser to remove diffuse wrinkling or discolouration; Thermage for skin tightening; sclerotherapy, which involves injecting a solution directly into the vein to treat varicose veins; the Q-switched laser, which fires very rapid pulses and blasts away pigment spots, and injections of fat to plump up the hands.
The Empower is a Q-switched laser made to deliver up to >30 watts at adjustable pulse repetition rates between 1 kHz and 10 kHz with Pulse energies as high as >20 millijoules.
Cobolt, a part of Hubner Photonics, has introduced the Cobolt Tor XS, a Q-switched laser at 1,064nm and 532nm, with 100 millijoules per pulse and 50 millijoules per pulse.
With further increasing the pump power beyond 18.8 W, the pulse train of the passively Q-switched laser became unstable and then disappeared.
The Q-switched laser heats particles to more than 1,000[degrees]C within nanoseconds, or billionths of a second.
M2 PHARMA-September 28, 2017-Fotona passes US FDA approval for StarWalker MaQX Q-Switched laser system for treating tattoos, vascular lesions & permanent hair reduction
M2 EQUITYBITES-September 28, 2017-Fotona passes US FDA approval for StarWalker MaQX Q-Switched laser system for treating tattoos, vascular lesions & permanent hair reduction
Caption: After not responding to several Q-switched laser treatments, this patient's tattoo responded to treatment with the PicoSure laser.
The Empower is a Q-switched laser delivering up to >30 watts at adjustable pulse repetition rates between 1 and 10 kHz.