Patent ID: 6253005
Filing Date: 2001-06-26
Classification: G02B

Abstract:
An optical package capable of compensating for a shift in optical alignment of optical components of the optical package, comprising:a dual fiber termination including a first optical fiber end portion for emitting a first optical signal axially therefrom, and a second optical fiber end portion disposed predeterminately adjacent to said first optical fiber end portion for receiving a second optical signal;a collimating lens having an optical axis and disposed in spaced relation to said dual fiber termination for collimating and transmitting the first optical signal from the first optical fiber end portion and for converging the second optical signal at a point of convergence on the second optical fiber end portion;a mirror spaced from said collimating lens and including a reflective layer configured and oriented for receiving the first optical signal from the collimating lens and for reflecting at least a portion of the received first optical signal toward said collimating lens along a propagation path to thereby define the second optical signal; anda compensation lens disposed between said collimating lens and said reflective layer of said mirror, said compensation lens being configured for receiving and deflecting the first optical signal from said collimating lens, having a focal length longer than a focal length of the collimating lens, and being selectively movable in an adjustment direction transverse to the optical axis to thereby adjust, by way of said selective movement, the propagation path of the reflected optical signal to align the second optical signal with the second optical fiber end portion wherein a resulting movement d.sub.poc of the point of convergence and said selective movement d.sub.comp of the compensating lens has a relationship d.sub.poc =.alpha..multidot.d.sub.comp, where a magnitude of .alpha. is a value less than one and greater than zero, so that said second optical fiber end portion receives the second optical signal without significant alignment-related optical loss.