Introduction

Optical packages are assemblies combining optical components, such as lenses, prisms, apertures, and filters, with electronic components such as laser diodes, photo diodes, amplifiers, and controllers.

Major applications include communications, where optical signals are transformed into electrical signals, and vice versa.

Satisfactory performance requires the highest precision alignments of the optical to the electronic parts. More challenging, thermo-electric coolers (TEC) that actively control the packages must also be integrated into the assembly.

This tutorial shows a multi-step process to mount a lens in a Transmitter Optical Sub-Assembly (TOSA). The complete operation requires that three bonding technologies (adhesive, soldering, thermocompression) all be carried out sequentially on one machine:

• A lens on a silicon sub-mount is mounted into a V groove at a defined distance from the outlet facet of a semiconductor laser.
• The silicon sub-mount is seated on a TEC, and the TEC is integrated into the TOSA.
• A flex contact is bonded onto the TOSA insert, for connection with peripheral devices.

Klaus Ohlsen
Finetech Germany

tutorial117 PDF (1,742 k)

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480-893-1630

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