Patent ID: 6301045
Filing Date: 2001-10-09
Classification: G02B,G02F,Y10S

Abstract:
A circulator comprising:a first collimator, a second collimator, and first, second and third ports, said first collimator defining the second port, said second collimator defining the first port and the third port, and a non-reciprocal section positioned between said first collimator and said second collimator;said non-reciprocal section including:a first isolator section and a complementary second isolator section commonly defining a forward path and a backward path thereof, whereby a forward light beam may enter the circulator from the first port of the second collimator, through the forward path and leave from the second port; in opposite, a backward light beam may enter the circulator from the second port, through the backward path and leave from the third port, wherein the forward path and the backward path are different from each other; wherein a non-birefringent deflecting device is provided between the first isolator section and the second isolator section.