{
  "patent_number": "US 11355900",
  "country": "US",
  "title": "How to Build a Compact Optical Transmitter for Data Networks",
  "original_title": "Small form factor transmitting device",
  "summary": "This patent describes a tiny, self-contained package for an optical transmitter that includes a laser, a cooling system, and lenses, all precisely aligned to send light signals into an optical fiber.",
  "what_it_does": "This patent details a compact, packaged optical transmitter device. It uses a base member with a flat part that holds a thermoelectric cooler module, a transmitter module, and an optical coupling lens, along with an assembling part on its side (Claim 1). A circuit board is bent so one end connects to the cooler and transmitter on the flat part, while the other end, raised higher, has an electrical port for outside connections (Claim 1). A cover sits over the main components. Crucially, a cylindrical part attaches to the assembling part, holding an isolator and a second lens, which are precisely aligned to guide the light signal from the transmitter into an external optical fiber (Claim 1). For example, this design allows a tiny laser diode (Claim 3) to be kept at a stable temperature by the cooler (Claim 2) and its light accurately directed into a hair-thin fiber.",
  "what_it_does_not_cover": [
    "Does not cover optical transmitters that do not use a thermoelectric cooler for temperature regulation.",
    "Does not cover devices where the circuit board is not bent or where its electrical port is not raised to a higher level.",
    "Does not cover optical coupling systems that lack both an isolator and a second lens for connecting to an optical fiber.",
    "Does not cover packaging where the optical components cannot be precisely aligned using specific plane and distance adjusting mechanisms.",
    "Does not cover the individual components like laser diodes or isolators when they are not part of this specific integrated package."
  ],
  "filed": "2020-12-08",
  "granted": "2022-06-07",
  "expires": "2040-12-08",
  "status": "active",
  "holder": "Marvell Asia Pte",
  "holder_url": "https://patentbrief.org/company/marvell-asia-pte",
  "inventors": [
    {
      "name": "Pi-Cheng Law",
      "url": "https://patentbrief.org/inventor/pi-cheng-law"
    },
    {
      "name": "Radhakrishnan L. Nagarajan",
      "url": "https://patentbrief.org/inventor/radhakrishnan-l-nagarajan"
    },
    {
      "name": "Peng-Chih Li",
      "url": "https://patentbrief.org/inventor/peng-chih-li"
    }
  ],
  "times_cited": 1,
  "tags": [
    "telecommunications",
    "semiconductors",
    "consumer_electronics"
  ],
  "abstract": "A packaged transmitter device includes a base member comprising a planar part mounted with a thermoelectric cooler, a transmitter, and a coupling lens assembly, and an assembling part connected to one side of the planar part. The device further includes a circuit board bended to have a first end region and a second end region being raised to a higher level. The first end region disposed on a top surface of the planar part includes multiple electrical connection patches respectively connected to the thermoelectric and the transmitter. The second end region includes an electrical port for external connection. Additionally, the device includes a cover member disposed over the planar part. Furthermore, the device includes a cylindrical member installed to the assembling part for enclosing an isolator aligned to the coupling lens assembly along its axis and connected to a fiber to couple optical signal from the transmitter to the fiber.",
  "url": "https://patentbrief.org/patent/us/11355900/small-form-factor-transmitting-device",
  "markdown_url": "https://patentbrief.org/patent/us/11355900/small-form-factor-transmitting-device/md",
  "google_patents_url": "https://patents.google.com/patent/US11355900",
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}