发明名称 |
Optical devices comprising series of birefringent waverplates |
摘要 |
Bidirectional isolating devices including non-reciprocal rotators (i.e. Faraday rotators) and wavelength selective reciprocal polarization rotators are disclosed. Each wavelength selective rotator behaves like a half-wave retarder in a first frequency range and behaves like a full-wave retarder in a second frequency range, according to a substantially periodic transfer function. The rotation has a predetermined number of birefringent elements (e.g. waveplates), the thickness and the orientation of which are chosen so as to obtain a transition between the half-wave retarder behavior and the full-wave retarder behavior in a frequency range lower than or equal to 40% of the period of the transfer function. In order to satisfy such a requirement, a relatively high number of birefringent elements is required, i.e. at least the five birefringent elements. Advantageously, the isolating device may comply with any allocation scheme for the opposite propagating signals.
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申请公布号 |
US2005259325(A1) |
申请公布日期 |
2005.11.24 |
申请号 |
US20040518473 |
申请日期 |
2004.12.20 |
申请人 |
GHIDINI SILVIA;SOCCI LUCIANO;ROMAGNOLI MARCO;FRANCO PIERLUIGI |
发明人 |
GHIDINI SILVIA;SOCCI LUCIANO;ROMAGNOLI MARCO;FRANCO PIERLUIGI |
分类号 |
G02F1/09;(IPC1-7):G02B5/30;G02B27/28 |
主分类号 |
G02F1/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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