Patent ID: 6678292
Filing Date: 2004-01-13
Classification: H01L,H01S

Abstract:
A top emitting vertical cavity surface emitting laser (VCSEL) and a photo-detecting optical output monitoring chip pair assembly, comprising(a) a header and a cover on the header, the header having at least three isolated connections and at least one non-isolated, connection a top portion of said cover having a partially transparent window and a partially reflecting surface; (b) a photo-detecting optical output monitoring chip mounted on said header, said monitoring chip having a bottom electrical contact connected with said non-isolated connection of said header and a top contact connected with one of said isolated connections and an upwardly facing photo-detecting surface, a VCSEL attached to said photo-detecting surface such that at least a portion of said photo-detecting surface is uncovered and positioned so that a portion of light emitted from said VCSEL is reflected by said partially reflecting surface on said window to said uncovered portion of said photo-detecting surface, said VCSEL having electrical contacts on said top emitting surface and connected to separate ones of said isolated connections, a back surface of said VCSEL being secured to said photo-detecting surface with an electrically isolating adhesive, whereby said back surface of said VCSEL and the photo-detecting surface on which said VCSEL is secured are metal free, thereby limiting parasitic capacitance, said electrical contacts on the top of said VCSEL for use in activating said VCSEL and said respective contacts on said monitoring chip for deriving an optical output from said monitoring chip.