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Lasers: Red Diode vs. Green IR pumped diode

Lasers: Red Diode vs. Green IR pumped diode. Laser diodes are the active element in solid state lasers Light producing region the size of a bacterium, 10,000 times smaller than LED Mirrors and the diode’s optical resonant cavity reflect and amplify the output light

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Lasers: Red Diode vs. Green IR pumped diode

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  1. Lasers: Red Diode vs. Green IR pumped diode • Laser diodes are the active element in solid state lasers • Light producing region the size of a bacterium, 10,000 times smaller than LED • Mirrors and the diode’s optical resonant cavity reflect and amplify the output light • Collimating lens makes divergent laser beam parallel • Green laser pointers have a much sharper spectral line • Consequence of Diode Pumped Solid State Frequency Doubled (DPSSFD) laser technology httpsafeco2.home.att.netlaser.htm

  2. DPSSFD laser technology • Common alternative since green laser diodes not feasible • 800-900 nm (ours 889) laser diode pumps Nd:YAGcrystal to produce 1064 nm laser • 1064 nm freq. doubled in KTP crystal to produce 532 nm green laser • KTP multiplies frequency by 2, 3, etc. • 359 nm peak is the tripled frequency • Filters reduce all but 532 nm laser • Nd:YAG produces narrow output. httprepairfaq.ece.drexel.edusamlsrptr1.gif 532 Doubled YAG 359 Tripled YAG 889 Pump Laser httpwww.kellerstudio.derepairfaqsaml54-101.gif 1064 YAG

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