Patent ID: 6587421
Filing Date: 2003-07-01
Classification: G02B,G11B,H04B

Abstract:
A system for propagating a light signal between a laser source and an information storage location comprising:an optical element disposed between the laser source and the information storage location for transmitting the light signal; a refractive index matching means coupled to the optical element for compensating the light signal for the effects of at least one spurious reflection; and a controller coupled to the laser source for modulating the laser source at a particular frequency in order to reduce interference between the light signal and the at least one spurious reflection; wherein the index matching means comprises a gradient index (GRIN) lens disposed between the laser source and a launch end of the optical element, the GRIN lens being coupled to the optical element so as to leave a gap between an inside surface of the GRIN lens and the launch end, and an index matching material disposed in the gap, the index matching material having a refractive index approximately equal to a refractive index of the optical element.