Abstract: A fiber tail assembly (FTA) with a micro-lens formed in the fiber tip is used to couple the laser light out of the package and along the fiber. The FTA is soldered at two points where metallized bands are deposited on the fiber pigtail, one at a fiber mount near the diode where it can be soldered into alignment with the laser diode, and two at the snout which forms a feed through the housing and seal for the package. Typically, the FTA is metallized along its entire length within the package. In this invention the two-metallized bands are separated by a region that is unmetallized.

Abstract: An optical connection module attaches an active or passive optical component to a substrate and aligns the optical component with a first laser. The optical connection module includes a fiber submount that is attached to the substrate and that includes a thermally insulating material having a thickness greater than 20 micrometers. The optical component is soldered to the fiber submount using heat from a second laser. A laser submount is attached to the substrate. The first laser is attached to the laser submount. A fiber bonding pad is located between the thermally insulating material and the optical component. The thermally insulating material and the fiber bonding pad promote lateral heat transfer and limit vertical heat transfer to the substrate during soldering. The thermally insulating material can be integrally formed in the substrate by flame hydrolysis or by anodic bonding.

Abstract: The invention provides a laser package having a single-mode laser diode for emitting light; a single-mode optical fiber comprising an uncoated microlens formed on an input end of said single-mode optical fiber, the microlens optically coupled to the laser diode for receiving the light, the microlens being constructed so as to reduce a level of back reflection into the laser diode so as not to disturb an operation of the laser diode, wherein a center axis of the single-mode optical fiber is co-planar with an optical axis of the laser diode; and a grating formed in the single-mode optical fiber for providing feedback to the laser diode to stabilize the emitted light from the laser diode. The single-mode optical fiber can include a length of polarization maintaining fiber between the grating and the single-mode laser diode.

Abstract: Methods for aligning an optical fiber with an optical device mounted on a base include: establishing a first position of support near the optical component so as to achieve a substantially optimum alignment, then establishing a second position of support farther way from the optical component so as to refine the alignment; passing the optical fiber through an opening of a support member mounted on the base, moving the optical fiber within the extend of the opening to achieve a substantially optimum alignment, and then fixing the optical fiber to the support; and moving the optical fiber to achieve a substantially optimum alignment with the optical component, then fixing the optical fiber to a support in such a manner that any shift in position that occurs during the fixing is substantially along the optical axis of the optical fiber.