US 10379301B2

Here's a concise summary of US Patent 10379301B2:

US Patent 10379301B2

• Title: Multi-channel parallel optical receiving device
• Assignee: Applied Optoelectronics Inc
• Inventors: Jian-Hong Luo, Dong-Biao JIANG, Peng Nie, Xiao-Liang DING
• Filing Date: 2017-02-14
• Issue Date: 2019-08-13
• Abstract: The patent describes a multi-channel parallel optical receiving device comprising a carrier, a light receiving chip, and a plurality of optoelectronic diodes arranged on a top surface of one end of the carrier, electrically connected to the chip. An optical fiber connector is located at another end of the carrier. An arrayed waveguide grating (AWG) is also on the carrier's top surface, with its input end connected to the optical fiber connector to receive an optical signal. The AWG divides the optical signal into multi-channel optical signals in parallel based on their wavelengths. A key feature is that the top surface of the AWG's output end is set at a predetermined angle (between 41 and 46 degrees, or specifically 42 degrees) to reflect these multi-channel optical signals to the photosensitive surfaces of the arrayed optoelectronic diodes.

Plain-Language Overview of Independent Claims:

• Independent Claim 1: This claim describes a multi-channel parallel optical receiving device. It includes a base (carrier) with a light-receiving chip and several light-detecting components (optoelectronic diodes) mounted directly on one end of its top surface, connected by wires. An optical fiber connector is at the other end of the carrier. An arrayed waveguide grating (AWG) is also on the carrier's top surface, positioned so the carrier is underneath its middle. The AWG takes an optical signal from the fiber connector and splits it into multiple optical signals based on their colors (wavelengths). A distinguishing feature is that the output end of the AWG has a top surface angled between 41 and 46 degrees. This angled surface acts as a mirror, reflecting the split optical signals downwards onto the light-detecting components.

• Independent Claim 7: This claim is very similar to Claim 1, also describing a multi-channel parallel optical receiving device with a carrier, a light-receiving chip, and optoelectronic diodes directly mounted and wire-bonded on the carrier's top surface. It also includes an optical fiber connector and an arrayed waveguide grating (AWG) on the carrier, where the carrier's midpoint underlies the middle of the AWG. The AWG receives and splits optical signals by wavelength. The key difference in this claim is that the top surface of the AWG's output end is specified to be at a precise predetermined angle of 42 degrees, which reflects the multi-channel optical signals to the photosensitive surfaces of the optoelectronic diodes.

Litigation Information (as of April 26, 2026):

No cases involving US10379301B2 were found in the CAFC dockets based on the current search. However, the patent document itself indicates several active or pending legal actions:

• Multiple US district court cases filed in the California Northern District Court (e.g., 5:24-cv-01010, 4:23-cv-04787, 4:24-cv-09041, 3:24-cv-01010, 3:24-cv-09041).
• Two PTAB cases: IPR2025-01567 (Pending - Instituted) and IPR2025-00434 (Not Instituted - Merits).
• The patent family has also had "First worldwide family litigation filed".