The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2005
Filed:
Jan. 07, 2002
David A. Ackerman, Hopewell, NJ (US);
John E. Johnson, New Providence, NJ (US);
David V. Lang, Madison, NJ (US);
C. Lewis Reynolds, Jr., Sinking Spring, PA (US);
David A. Ackerman, Hopewell, NJ (US);
John E. Johnson, New Providence, NJ (US);
David V. Lang, Madison, NJ (US);
C. Lewis Reynolds, Jr., Sinking Spring, PA (US);
Triquint Technology Holding Co., Hillsboro, OR (US);
Abstract
A method of increasing the monomolecular recombination and the immunity to noise of a continuously tunable laser is disclosed. A concentration of recombination centers in the range of about 1×10cmto about 1×10cmin the tuning region of the laser device is achieved by doping the waveguide layer with impurity atoms, by irradiating the waveguide layer with high energy particles or by varying the growth conditions of the waveguide layer to introduce native point defects due to lattice mismatch. This way, the monomolecular recombination is increased and the radiative recombination over low current ranges is reduced. By increasing the monomolecular recombination, the immunity to noise is improved but the tuning efficiency is reduced. Nevertheless, only a minimal effect on the tuning efficiency is noted over high current ranges and, therefore, the overall tuning range is only insignificantly changed.