Optical systems with antireciprocal polarization r

专利名称：Optical systems with antireciprocal

polarization rotators

发明人：John Hegarty,Raymond Wolfe申请号：US06/771016申请日：19850830公开号：US04762384A公开日：19880809

摘要：An optical system, e.g., an optical fiber communication system or an opticalmass storage device, which includes a linearly birefringent polarization rotator useful inan optical isolator or optical circulator, is disclosed. The rotator, which compensates forthe effects of linear birefringence and is substantially antireciprocal, includes two ormore material regions which are capable of subjecting incident light to ellipticbirefringences. However, the sign and/or magnitude of the linear, or the sign and/ormagnitude of the circular, components of the elliptic birefringences differ from region toregion. Moreover, the length of each region, except the first or last region, is

substantially equal to one- half the birefringent period of the region. The length of thefirst or last region, by contrast, is substantially equal to one-quarter the birefringentperiod of the region.

申请人：AMERICAN TELEPHONE AND TELEGRAPH COMPANY, AT&T BELLLABORATORIES

代理人：Bernard Tiegerman

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