( ( All ( of ( these lasers ) ) ) ( ( produce ( ( coherent light ) ( in ( visible wavelengths ) ) ) ) . ) )
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (DT these) (NNS lasers)))) (VP (VBP produce) (NP (NP (JJ coherent) (NN light)) (PP (IN in) (NP (JJ visible) (NNS wavelengths))))) (. .)))
All of these lasers produce coherent light in visible wavelengths.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN device)) (SBAR (WHNP (WDT that)) (S (VP (VBZ produces) (NP (NP (DT a) (ADJP (RB very) (VBN focused)) (NN beam)) (PP (IN of) (NP (NP (JJ visible) (NN light)) (PP (IN of) (NP (NP (RB just) (CD one) (NN wavelength)) (CC and) (JJ color) (NP (DT a) (NN laser)))))))))))) (. .)))