公开(公告)号：CA2368255A1

公开(公告)日：2000-11-02

申请号：CA2368255

申请日：2000-04-07

Applicant: CORNING INC

Inventor： SUMMA MARK A ,  WILLIAMS GREGORY E ,  SCHMITT WILLIAM E ,  MARRO MARLENE A

IPC: G01M11/02 ,  G01M11/00

Abstract: An apparatus for measuring polarization dependent loss is disclosed featurin g several fiber optic couplers combined in tandem and oriented such that the P DL noise of the measurement system is reduced to a negligible level. By matchin g the PDLs of the couplers and vectorally subtracting opposite phases of polarization, the PDL of the measurement system is virtually eliminated. Thu s, the PDL noise floor is lowered to near zero and the PDL of the optical devic e- under-test (DUT) can be accurately measured. The system is relatively inexpensive to implement and offers needed versatility because it measures t he PDL of optical devices that operate in a reflection mode or in a forward transmission mode. Thus, it provides one PDL measurement solution for both types of devices.

公开(公告)号：AU7079400A

公开(公告)日：2001-04-24

申请号：AU7079400

申请日：2000-08-25

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  COLLIER ADAM K ,  DONG LIANG ,  MARRO MARLENE A ,  QI GANG

IPC: G02B6/02 ,  C03C13/04 ,  G02B5/18 ,  G02B6/036 ,  G02B6/10 ,  G02B6/16

公开(公告)号：AU5439200A

公开(公告)日：2000-11-10

申请号：AU5439200

申请日：2000-04-07

Applicant: CORNING INC

Inventor： MARRO MARLENE A ,  SCHMITT WILLIAM E ,  SUMMA MARK A ,  WILLIAMS GREGORY E

IPC: G01M11/02 ,  G01M11/00

Abstract: An apparatus for measuring polarization dependent loss is disclosed featuring several fiber optic couplers combined in tandem and oriented such that the PDL noise of the measurement system is reduced to a negligible level. By matching the PDLs of the couplers and vectorally subtracting opposite phases of polarization, the PDL of the measurement system is virtually eliminated. Thus, the PDL noise floor is lowered to near zero and the PDL of the optical device-under-test (DUT) can be accurately measured. The system is relatively inexpensive to implement and offers needed versatility because it measures the PDL of optical devices that operate in a reflection mode or in a forward transmission mode. Thus, it provides one PDL measurement solution for both types of devices.

公开(公告)号：MXPA01010869A

公开(公告)日：2002-05-14

申请号：MXPA01010869

申请日：2000-04-07

Applicant: CORNING INC

Inventor： MARRO MARLENE A

IPC: G01M11/02 ,  G01M11/00

Abstract: Se describe un aparato para medir la perdida dependiente de polarizacion caracterizando varios acopiadores de fibras opticas combinados en tandem y orientados de tal manera que el ruido de la PDL del sistema de medicion se reduce a un nivel negligible; al hacer coincidir las PDL de los acopiadores y sustraer vectorialmente las fases opuestas de polarizacion, la PDL del sistema de medicion se elimina virtualmente; por lo tanto, el piso del ruido de la PDL se disminuye a casi cero y la PDL del dispositivo optico bajo prueba (DUT) puede medirse adecuadamente; el sistema es relativamente barato para implementar y ofrece necesariamente versatilidad debido a que este mide la PDL de dispositivos opticos que operan en un modo de reflexion o en un modo de transmision en retroceso; por lo tanto, este provee una solucion de medicion de la PDL para ambos tipos de dispositivos.

公开(公告)号：CA2383416A1

公开(公告)日：2001-03-29

申请号：CA2383416

申请日：2000-08-25

Applicant: CORNING INC

Inventor： QI GANG ,  BHATIA VIKRAM ,  DONG LIANG ,  COLLIER ADAM K ,  MARRO MARLENE A

IPC: G02B6/02 ,  C03C13/04 ,  G02B5/18 ,  G02B6/036 ,  G02B6/10 ,  G02B6/16

Abstract: An optical waveguiding fiber has a photosensitive core and a cladding that includes a photosensitive inner cladding region adjacent the core and an out er cladding region. The inner cladding region and the outer cladding region hav e substantially equal indices of refraction. The photosensitivity of the inner cladding region is sufficient to cause a modulation of the index of refracti on of the inner cladding when exposed to ultraviolet light. In another aspect o f the invention, the optical fiber includes a grating in the core, which exten ds radially into the inner cladding region. The core and the inner cladding region of the optical fiber are doped with concentrations of Ge and B sufficient to impart photosensitivity to the inner cladding region, and to result in an index of refraction in the inner cladding region substantially equal to the index of refraction of the outer cladding region.