Process for cutting an optical fiber

{
  "publication_number": "US6246026B1",
  "country": "US",
  "kind": "B1",
  "title": "Process for cutting an optical fiber",
  "abstract": "A process for cutting or splitting at least one optical fiber at a predetermined angle, wherein the fiber is introduced into a holding and positioning device and is cut by a pulsed laser beam.",
  "claims": [
    "1. A process for cutting at least one optical glass fiber at a predetermined angle, the process comprising the steps of: introducing the glass fiber into a holding and positioning device; actuating a laser device to deliver a pulsing beam having sufficient energy to ablate glass; and effecting the relative movement of the beam across the fiber at a predetermined angle to ablate the glass and produce an end face.",
    "2. The process according to claim 1 wherein a plurality of fibers are introduced into the holding and positioning device parallel to one another and moving the beam across the plurality so that the fibers are cut in succession.",
    "3. The process according to claim 1 wherein the fiber is a ribbon fiber having multiple fibers therein.",
    "4. The process according to claim 1 wherein the laser is a CO 2 laser.",
    "5. The process according to claim 4, wherein the laser device delivers pulses with peak power between 0.1 and 1000 watts and the pulse length is greater than 50 fs.",
    "6. The process according to claim 4, wherein the laser device delivers pulses at a wavelength of 10 0.6 μm having a peak power of 600 watts and a pulse length of 35 μs.",
    "7. The process according to claim 1, wherein the end face is not normal to the axis of the fiber.",
    "8. The process according to claim 7, wherein the holding and positioning device has an x,y, and z-axis and the fiber is held such that the y-axis is parallel to the axis of the fiber, and wherein the beam is moved across the fiber at the predetermined angle from the z-axis.",
    "9. The process according to claim 7, wherein the holding and positioning device has an x,y, and z-axis and the fiber is held such that the y-axis is parallel to the axis of the fiber, and wherein the beam is moved across the fiber at the predetermined angle from the y-axis.",
    "10. The process according to claim 1, wherein the predetermined angle is achieved by orienting the holding and position device at the predetermined angle relative to the beam."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThe invention relates to a process for cutting at least one optical fiber at a predetermined angle, wherein the fiber is introduced into a holding and positioning device.\n\n2. Description of the Prior Art\n\nOptical fibers made of glass are often used in optical transmission systems and other optical systems. The machining of the end face of these fibers plays a crucial role during the use of these monomode or multimode fibers. It is important that the end faces have a particularly uniform surface so that the transition from one fiber end to another or to an active element can be carried out with damping values which are as low as possible. It is also important that the end faces of the fibers can be produced at predetermined angles and that these angles are reliable and reproducible.\n\nVarious mechanical processes are currently known for severing optical fibers. With all processes, the fiber is essentially fixed in a holding device consisting of two holders which are then mutually offset, for example, so that the correct angle is ensured during the cutting operation. Diamond cutters, for example, are used. It is also known to twist the fiber or begin to cut and then break the fibers which are to be cut. All these processes are expensive. In addition, they are also applicable to the parallel fibers of a ribbon cable only under certain conditions.",
  "cpc": [
    "G02B 6/25",
    "B23K 26/0624"
  ],
  "ipc": [
    "B23K 26/06",
    "G02B 6/25"
  ],
  "assignees": [
    "Whitaker LLC"
  ],
  "inventors": [
    "Henricus Jozef Vergeest"
  ],
  "filing_date": "1999-09-14",
  "publication_date": "2001-06-12",
  "grant_date": "2001-06-12",
  "priority_date": "1998-09-18",
  "application_number": "US-39535299-A",
  "family_id": "8232655",
  "cited_by_count": 109,
  "citations": [
    "US4158555A",
    "JPS5430590A",
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    "JPS56122691A",
    "JPS5870767A",
    "GB2110358A",
    "JPS58145387A",
    "FR2538916A1",
    "JPS63188485A",
    "EP0387583A2",
    "EP0442202A2",
    "EP0531225B1",
    "US5226101A",
    "US5983676A"
  ]
}