Patents by Inventor Joachim PIPREK

Joachim PIPREK has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Two-cavity surface-emitting laser
    Patent number: 8824518
    Abstract: A the vertical-cavity surface-emitting laser includes a stripe-shaped active medium (10) having an emission maximum at a first wavelength (?1), wherein a first reflector (18) is arranged below the stripe-shaped active medium (10) and a second reflector (20) is arranged above the stripe-shaped active medium (10), with the first reflector (18) facing the second reflector (20), wherein the first reflector (18) and a second reflector (20) have a reflectivity maximum in the region of the first wavelength (?1), wherein a third reflector (12) and a fourth reflector (13) are each arranged on a side above or next to the stripe-shaped active medium (10), wherein the third reflector (12) faces the fourth reflector (13), and wherein the third reflector (12) and the fourth reflector (13) have a reflectivity maximum in the region of a second wavelength (?2), wherein the first wavelength (?1) is greater than the second wavelength (?2).
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 2, 2014
    Assignee: Forschungsverbund Berlin e.V.
    Inventors: Günther Tränkle, Joachim Piprek, Hans Wenzel, Götz Erbert, Markus Weyers, Andrea Knigge
  • TWO-CAVITY SURFACE-EMITTING LASER
    Publication number: 20110228805
    Abstract: A the vertical-cavity surface-emitting laser includes a stripe-shaped active medium (10) having an emission maximum at a first wavelength (?1), wherein a first reflector (18) is arranged below the stripe-shaped active medium (10) and a second reflector (20) is arranged above the stripe-shaped active medium (10), with the first reflector (18) facing the second reflector (20), wherein the first reflector (18) and a second reflector (20) have a reflectivity maximum in the region of the first wavelength (?1), wherein a third reflector (12) and a fourth reflector (13) are each arranged on a side above or next to the stripe-shaped active medium (10), wherein the third reflector (12) faces the fourth reflector (13), and wherein the third reflector (12) and the fourth reflector (13) have a reflectivity maximum in the region of a second wavelength (?2), wherein the first wavelength (?1)) is greater than the second wavelength (?2).
    Type: Application
    Filed: December 15, 2010
    Publication date: September 22, 2011
    Applicant: FORSCHUNGSVERBUND BERLIN E.V.
    Inventors: Günther TRÄNKLE, Joachim PIPREK, Hans WENZEL, Götz ERBERT, Markus WEYERS, Andrea KNIGGE