Abstract
The present invention is related to an optical signal interleaver having at least one adjustable offset optical crystal. The optical signal interleaver utilizes a rectangular body as a package mechanism in which a groove is defined for receiving a plurality of optical crystals, such as birefringent elements. The offset optical crystal is deposited on an adjusting mechanism that is placed into the groove and among these birefringent elements through an opening defined at the bottom or sidewall of the body. When the adjusting mechanism is rotated or moved vertically in relation to the groove, the position and the angle of the offset optical crystal is accordingly changed. Thus, when a light signal passes through the plurality of the crystal elements, the offset optical crystal properly enhances the performance of light-splitting.