Lithium niobate optical TE-TM mode splitter
US5436992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Oct 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/126
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
We disclose a new optical TE-TM mode splitter on lithium niobate. The splitter is fabricated by using an asymmetric Y-junction structure which is composed of a straight waveguide, and two branch waveguides. The straight waveguide is the input one that can guide randomly-polarized light (i.e. both TE and TM modes). The two branch waveguides are the output ones, and one of them can guide only the TE mode, the other can guide only the TM mode. Because the output waveguides can individually guide the TE and TM modes, the input modes are then split by the branch waveguides. The input waveguide is fabricated by diffusing titanium into lithium niobate. The two output waveguides are made by nickel indiffusion and magnesium-oxide induced lithium outdiffusion or proton exchanged techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.