Kok-Wai Chang
55Patents
17h-index
41Co-inventors
84Inventor score
Filing activity: Mar 18, 1986 → Nov 13, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5699462A | Total internal reflection optical switches employing thermal activation | Physics | 136 | Expired |
| US5436925A | Colliding pulse mode-locked fiber ring laser using a semiconductor saturable absorber | Electricity | 86 | Expired |
| US5960131A | Switching element having an expanding waveguide core | Physics | 64 | Expired |
| US6118910A | Method of aligning optical fibers to a multi-port optical assembly | Physics | 50 | Expired |
| US5734763A | Compact two-by-n optical components based on bierfringent walk-off crystals | Physics | 46 | Expired |
| US6301046A | Interleaver/deinterleavers causing little or no dispersion of optical signals | Physics | 44 | Expired |
| US5446578A | Polarization preserving optical isolator | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5448579A | Polarization independent picosecond fiber laser | Electricity | 42 | Expired |
| US4974944A | Optical nonreciprocal device | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6014244A | Multi-port optical circulator utilizing imaging lens and correction optical element | Physics | 34 | Expired |
| US5724373A | Microphotonic acousto-optic tunable laser | Electricity | 31 | Expired |
| US5611004A | Microphotonic polarization independent acousto optical tunable filter and receiver | Physics | 27 | Expired |
| US6823093B2 | Tunable micro-optic architecture for combining light beam outputs of dual capillary polarization-maintaining optical fibers | Physics | 19 | Expired |
| US5930418A | Optical assembly and method based on TEC fibres | Physics | 19 | Expired |
| US5808793A | Low-cost compact optical isolators | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6078716A | Thermally expanded multiple core fiber | Physics | 18 | Expired |
| US5974205A | Compact two-by-n optical components based on birefringent walk-off crystals | Physics | 18 | Expired |
| US6149278A | Wavelength independent variable optical attenuator | Physics | 15 | Expired |
| US8125704B2 | Systems and methods for controlling a pulsed laser by combining laser signals | Electricity | 14 | Active |
| US6026202A | Compact, low crosstalk, three-port optical circulator | Physics | 11 | Expired |
| US6097869A | Multiple port reflection based circulator | Physics | 11 | Expired |
| US5528724A | Apparatus and method for aligning optical fibers with respect to one another | Physics | 10 | Expired |
| US6075642A | Multi-port optical isolator | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6374009B1 | TEMC fiber based optical switch | Physics | 10 | Expired |
| US7081996B2 | Isolated polarization beam splitter and combiner | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.