COHR shares plunged 12.2% in premarket trade Wednesday to a three-year-low after the company’s fiscal third quarter profit fell far short of expectations. The company also provided a gloomy outlook, as revenues suddenly slowed. The company’s net loss for the three months ending March 31, was $33.5 million or 24 cents per share. This is a dramatic change from the net income of 31.9 million or 28 cents per share in the previous period. The adjusted earnings per share, excluding nonrecurring items, fell from 95 cents to 58 cents. This is well below FactSet’s consensus of 82cents. Revenue increased by 49.8%, to $1.24…