Abstract: A fiber waveguide optical subassembly uses the multi-mode fiber to increase the alignment tolerance between the active optical element and the waveguide. The filter is thinner to lower the dispersion due to the optical coupling gap. The subassembly further combines the optical bench to achieve passive positioning. Therefore it reduces the cost and enhances the transmission rate.

Abstract: A dynamic pressure sensing structure used in a condenser microphone includes an upper electrode plate, a lower electrode plate, a spacer and a substrate, wherein the upper and lower electrode plates are separated by the spacer and form a resonance cavity with the substrate. The upper electrode plate comprises a flat vibration area and a surrounding flexible area connected thereto. The lower electrode plate comprises a sensible electrode and an actuation electrode surrounding the sensible electrode. The plate is in connection with the flexible area so that a capacitor is formed between the sense area and the flat vibration area. The actuation electrode provides a polarization voltage to generate an electrostatic force, thereby attract the flexible vibration area to curve downwards so that the flat vibration area moves in a flat state and a distance between the flat vibration area and the sensible electrode is varied correspondingly.

Abstract: A parallel optical subassembly module structure comprises an opto-electronic device array, a base with a reflecting slope, and a micro-lens array plate with an inclined plane provided with a specific angle. The optical signal emitted from the opto-electronic device array reflects by the reflecting slope and is incident into the inclined plane of the micro-lens array plate with the specific angle. The inclined plane rectifies the optical signal to output in horizontal direction. Then the optical signal couples with the external fibers through each micro lens of the micro-lens array. The pathway of receiving the optical signal is the same as described above, but in reverse direction.