Title:
COMPACT EXTERNAL GRATING PBS/PBC COUPLER
Document Type and Number:
WIPO Patent Application WO/2015/165404
Kind Code:
A1
Abstract:
Approaches to Compact External Grating PBS/PBC Coupling are described according to embodiments. In one embodiment, a YVO4 crystal (103) is used to split a beam or combine multiple beams into a single beam. A lens (102) is used to convert a mode of the light to match a mode of a grating port (105). A glass wedge (104) is designed to bend the light from horizontal to a nearly vertical orientation to match an exit angle of a grating port (105). When a source (101) or a receiver utilizes an optical fiber (1007), a fiber holder (1006) may be used to bond the fiber (1007) to the source (101) or receiver. The PBS/PBC described has much less insertion loss compared to existing 2D grating coupler techniques, and has a wider spectral bandwidth due to flexibility in mode matching compared to existing 2D grating couplers. The PBS/PBC described herein also has a better polarization-extinction ratio than the existing 2D grating couplers, and the horizontal coupling configuration enables a design that is thinner and more compact compared to the near vertical coupling in 2D grating coupling.
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Inventors:
MIAO RONGSHENG (US)
BAI YUSHENG (US)
BAI YUSHENG (US)
Application Number:
PCT/CN2015/077814
Publication Date:
November 05, 2015
Filing Date:
April 29, 2015
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G02B6/34; G02B6/32
Domestic Patent References:
| WO2004104664A1 | 2004-12-02 | |||
| WO2013089755A1 | 2013-06-20 |
Foreign References:
| US20140099057A1 | 2014-04-10 | |||
| CN102741721A | 2012-10-17 | |||
| US20100006784A1 | 2010-01-14 |
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