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:
Aug. 19, 2003
Filed:
Aug. 07, 2001
Yuliya Anatolyevna Akulova, Goleta, CA (US);
Mindaugas Fernand Dautartas, Blacksburg, VA (US);
Marlin Wilbert Focht, Williams Township Northhampton County, PA (US);
Kenneth Gerard Glogovsky, Kempton, PA (US);
Abdallah Ougazzaden, Emmaus, PA (US);
Justin Larry Peticolas, Wescosville, PA (US);
Agere Systems Optoelectronics Guardian Corp., Orlando, FL (US);
Abstract
A beam expander for providing coupling between a semiconductor optical device and an optical fiber comprises a double layer structure that may be integrated with the optical device. The first, underlying layer of the expander comprises a relatively high refractive index material (e.g., 3.34), thus providing improved coupling efficiency between the optical device and the fiber. The second, covering layer of the expander comprises a relatively low refractive index material (e.g., 3.28), for providing the large mode size desired at the fiber input. The parameters of each layer can be adjusted independently, allowing for the two criteria (coupling efficiency and mode size) to be separately optimized.