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：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.