MULTICHANNEL RECEIVER OPTICAL SUBASSEMBLY WITH IMPROVED SENSITIVITY

摘要

A multi-channel receiver optical subassembly (ROSA) such as an arrayed waveguide grating (AWG), with outputs directly optically coupled to respective photodetectors such as photodiodes. In one embodiment, the photodetectors are mounted on a photodetector mounting bar that includes a multiple conductive photodetector pads (PD pads). Each of the PD pads may be configured to receive a photodetector, and the PD pads are electrically isolated from ground such that the photodetectors are floating. The photodetector bar further includes multiple conductive transimpedance amplifier pads (TIA pads). Each of the TIA pads may be configured to receive a TIA, associated with one of the photodetectors, and to be electrically coupled to one or more ground ports of the TIA. The TIA pads are electrically connected to a common ground shared be each of said TIAs.

主权项

1. A photodetector mounting bar comprising:
a plurality of conductive photodetector pads (PD pads), each of said PD pads configured to receive a photodetector, wherein said PD pads are electrically isolated from ground such that said photodetectors are at a floating ground; and a plurality of conductive transimpedance amplifier pads (TIA pads), each of said TIA pads configured to receive a TIA, associated with one of said photodetectors, and electrically coupled to one or more ground ports of said TIA, wherein said TIA pads are electrically connected to a common ground shared by each of said TIAs.